- 05-03-2007, 03:20 PM
Clinical vampirism: blending myth and reality.
* Jaffe PD,
* DiCataldo F.
University of Geneva, Switzerland.
Vampires arouse strong popular interest and attract large print and film audiences. Their influence is also notable in clinical vampirism, a rare condition described in the forensic literature covering some of humanity's most shocking behaviors. Definitions of vampirism involve aspects of necrophilia, sadism, cannibalism, and a fascination with blood. Its relationships with established diagnostic categories, particularly schizophrenia and psychopathy, are also examined and illustrated by the presentation of a "modern" vampire. As myth and reality are disentangled, clinical vampirism reveals the complex mother-child dyad's blood ties running amok.
PMID: 7718926 [PubMed - indexed for MEDLINE]
Digital imaging of the dissection and sexual abuse of a corpse - An exceptional case of necrophilia.
* Bauer M,
* Tatschner T,
* Patzelt D.
Institute of Legal Medicine, University of Wuerzburg, Germany.
Regular necrophilia refers to the sexually motivated abuse of corpses and is not considered as severe crime in many western countries. However, the risk of "switching" to necrophilic homicides, i.e., committing a homicide to obtain a dead body, has to be assessed by forensic experts. We present a case of semi-professional dissection, preservation and sexual abuse of the body and body parts of a 14-year-old girl. Every step was documented by the offender on thousands of digital images thus allowing an exact reconstruction of necrophilic acts and fantasies. Three months after the disappearance of the body the remains could be recovered and linked to the deceased by pathological examination and DNA analysis. The offender had excessively used the internet for downloading files with sadistic and necrophilic contents including autopsy instructions. The psychiatric examination of the socially integrated and married patient revealed a severe personality disorder. Two other, previously unsolved cases could be attributed to him showing a clear progression of fantasies and acts.
PMID: 17157546 [PubMed - in process]MOTIV8 II Challenge
-=The Big Squirrel Nut Swingers=-
- 05-03-2007, 03:25 PM
Can physique and gluteal size predict penile length in adult Nigerian men?
* Orakwe JC,
* Ogbuagu BO,
* Ebuh GU.
Department of Surgery, Nnamdi Azikiwe University, Nnewi Campus, Nnewi. [email protected]
BACKGROUND: In Nigeria, especially among the Igbo tribe, there is a well-held belief that a man's penile size can be predicted from his physique and the size of his buttocks, with people of small physique and flat buttocks likely to have long penile lengths. STUDY DESIGN: A prospective study to test the scientific veracity of this traditional and apparently mythical belief. Stretched penile length was measured in 115 men between the ages of 30-65 years and its correlation with the body-mass index and the circumference of the hip as measured around the most prominent points on their buttocks, was statistically determined. RESULT: The mean age of the subjects was 42.30 years (SD = 9.67), with a median of 40 years and a range of 30-65 years. The mean penile length was 13.37 cm with a median of 13 cm and a range of 7.5-19.5 cm. The mean circumference of the body around the buttocks was 96.46 cm (SD = 10.91), median 98 cm, and range 73-122 cm. The body-mass index ranged 17.34-44.44, with the mean at 26.87 (SD = 5.86), and the median 25.53. Linear regression statistics showed no statistically significant correlation between stretched penile length and body-mass index, thus physique. There was a significant direct correlation between penile length and gluteal size. CONCLUSION: The supposed relationship between penile length and gluteal size may have a scientific basis, but contrary to belief, large buttocks is more predictive of longer penile length than small buttocks. Penile length has no relationship to physique.
PMID: 17191423 [PubMed - indexed for MEDLINE]MOTIV8 II Challenge
-=The Big Squirrel Nut Swingers=-
05-03-2007, 03:30 PM
Sword swallowing and its side effects
Brian Witcombe, consultant radiologist1 and Dan Meyer, executive director2
1Department of Radiology, Gloucestershire Royal NHS Foundation Trust, Gloucester GL1 3NN
2Sword Swallowers' Association International, 3729 Belle Oaks Drive, Antioch, Tennessee 37013, USA
Correspondence to: B Witcombe Email: [email protected]
Accepted October 28, 2006.
References AbstractObjective To evaluate information on the practice and associated ill effects of sword swallowing.
Design Letters sent to sword swallowers requesting information on technique and complications.
Setting Membership lists of the Sword Swallowers' Association International.
Participants 110 sword swallowers from 16 countries.
Results We had information from 46 sword swallowers. Major complications are more likely when the swallower is distracted or swallows multiple or unusual swords or when previous injury is present. Perforations mainly involve the oesophagus and usually have a good prognosis. Sore throats are common, particularly while the skill is being learnt or when performances are too frequent. Major gastrointestinal bleeding sometimes occurs, and occasional chest pains tend to be treated without medical advice. Sword swallowers without healthcare coverage expose themselves to financial as well as physical risk.
Conclusions Sword swallowers run a higher risk of injury when they are distracted or adding embellishments to their performance, but injured performers have a better prognosis than patients who suffer iatrogenic perforation.
Top IntroductionSword swallowers know their occupation is dangerous. The Sword Swallowers' Association International (SSAI, Sword Swallowers Association International) recognises those who can swallow a non-retractable, solid steel blade at least two centimetres wide and 38 centimetres long. As we found only two English language case reports of injury resulting from sword swallowing,1 2 we explored the technique and side effects of this unusual practice.
References MethodsWe sent a letter to members and contacts of the association asking if they were willing for data held in its archives to be published and asking how they learnt the technique and how many swords they had swallowed in the previous three months. We did not send out a medical questionnaire but invited swallowers to describe any medical problems associated with sword swallowing. One medical adviser was approached after one swallower, injured during the course of the study, gave her consent, and a few close associates of one of the authors (DM) answered direct medical questions. We obtained written consent from everyone whose history is mentioned. We excluded cases in which injury was related to swallowing items other than swords, such as glass, neon tubes, spear guns, or jack hammers.
References ResultsWe sent letters to 110 members or contacts of the association in 16 countries; 48 responded and 46 (41.8%) consented to information being published (40 were men). The average age was 31 (range 16-64). Most were self taught and described how they learnt the technique. The average age when they learnt sword swallowing was 25 (range 13-46); nine learnt as teenagers. The average height was 176 cm (range 58-191 cm), average weight 79 kg (range 46-127 kg), and the longest sword swallowed was on average 60 cm (range 43-79 cm). There was no apparent correlation between the length of the longest sword each person could swallow and their height (correlation coefficient 0.20) or weight (−0.08). Twenty five had swallowed more than one sword at a time, five had swallowed more than 10 at a time, and one had swallowed 16 swords together (fig 1). Over the previous three months, the average number of swords swallowed was 43 (range of 0-300).
Thirteen respondents did not volunteer any medical information, but 19 described sore throats, usually when they were learning to swallow, after performing too frequently, or when they were swallowing multiple or odd shaped swords. Lower chest pain, often lasting days, followed some performances and was usually treated by abstaining from practice. They rarely sought medical advice. Six suffered perforation of the pharynx or oesophagus. Three of these had surgery to the neck, one having a 1.5 cm laceration at the level of D2 and a pneumothorax, one a pinhole laceration at C6 and surgical emphysema, and the other having a pharyngeal tear. The perforations were treated conservatively in three patients, one of whom had a second perforation with aspiration of a neck abscess after further injury. Three others also had probable perforations, one of whom was told that a sword had “brushed” the heart, and one had pleurisy and another pericarditis after injury, suggesting extraoesophageal trauma. No one underwent thoracotomy, although one had a breadknife removed transabdominally. Sixteen mentioned intestinal bleeding, varying in quantity from melaena or finding some blood on a withdrawn sword to large haematemases necessitating transfusion. No members of the association had died from sword swallowing, but the cost of medical care was a concern with three members receiving medical bills around $23000-$70000 (£12000-£37000, €18000-€55000).
References DiscussionOur study relied on the memory of some of the 50 sword swallowers active in the English speaking world as well as some retired performers. Respondents could have exaggerated side effects, but it is more likely that details were overlooked. We did know of some incidents that involved non-respondents, and most serious events probably would have come to the attention of the association.
Some respondents swallowed a sword easily, but mastery for most required daily practice over months or years. The gag reflex is desensitised, sometimes by repeatedly putting fingers down the throat, but other objects are used including spoons, paint brushes, knitting needles, and plastic tubes before the swallower commonly progresses to a bent wire coat hanger. The performer must then learn to align a sword with the upper oesophageal sphincter with the neck hyper-extended. The next step requires relaxation of the pharynx and oesophagus and particularly the horizontal fibres of cricopharyngeus, which are not usually under voluntary control.3 Devgan et al have shown that one swallower was able to reduce voluntarily the resting pressure of this sphincter by 10-20 mm Hg.3 This swallower described having to “relax the muscles of his neck,” and several swallowers mentioned not being able to perform when they could not “relax” or the throat “closing up” when sore. Huizinga4 described a swallower who “sucked in” the sword, and a lateral radiograph in Huizinga's paper shows the pharynx filled with air, but preliminary air swallowing is not invariable. Force must not be used and the clean sword is usually lubricated at least with saliva. One performer used butter, and one had to retire because of a dry mouth caused by medication.
Once the swallower has got the sword past the cricopharyngeal sphincter and relaxed the oesophagus, he or she must learn to control retching so the sword can be passed down to the cardia. The cardia lies about 40 cm from the teeth and the sword straightens the flexible and distensible oesophagus. Further progress depends not only on the swallower learning to relax the lower oesophageal sphincter and controlling retching but also on the shape of the stomach. The angle of the gastro-oesophageal junction and lesser curve vary, being obtuse in the vertically oriented stomach, particularly when it is full, and more acute in the high horizontal stomach often present in thickset individuals (fig 2). A 220 cm giant is said to hold the record for the longest swallowed sword (82.5 cm) and body build should have a bearing on what length of sword can pass. Nevertheless, we did not find any correlation between the longest sword an individual could swallow and their size, suggesting other factors are important.
Some experienced artistes add embellishments that increase danger. Some let the sword fall abruptly, a manoeuvre known as “the drop,” controlling the fall of the sword with the muscles of the pharynx, and some invite members of the audience to move the sword. One lies prone on a bed of nails; one sometimes performs on a unicycle; and another under water.
Sore throats—“sword throats”—occur when swallowers are learning, when performances are repeated frequently, or when odd shaped or multiple swords are used. Lower chest pains occur occasionally, most often after an obviously damaging swallow or when the “drop” is practised frequently. One performer described this pain after performing the drop 40 times a day in a state fair, and another described shoulder tip pain implying diaphragmatic irritation. Proprietary medicines are used for this problem, physicians are rarely consulted, and abstinence from swallowing swords is the main treatment.
Major injury is sometimes preceded by a previous painful performance, suggesting that minor injury may predispose to more serious damage. Occasionally a sword is difficult to advance or retract, presumably because of spasm or mucosal dryness related to nervousness or soreness. Overforceful efforts to move the sword may then cause trauma, and this resulted in oesophageal perforation in one performer. Several cases of perforation or severe haemorrhage occurred when swallowers used multiple or unusual swords or when a technical error was committed, often because of distraction. For example, one swallower lacerated his pharynx when trying to swallow a curved sabre, a second lacerated his oesophagus and developed pleurisy after being distracted by a misbehaving macaw on his shoulder, and a belly dancer suffered a major haemorrhage when a bystander pushed dollar bills into her belt causing three blades in her oesophagus to scissor. Of the 12 cases of probable perforation, including the two previously described in the literature, at least five involved the cervical or upper dorsal oesophagus with only one definite pharyngeal perforation. The other injuries were either lower down or the exact level of perforation was uncertain. All these patients survived, and no contacts of the association have died as a direct result of sword swallowing and no deaths have been reported in the medical literature. There is historical evidence elsewhere, however, and deaths from swallowing swords and other items such as neon tubes are described on the internet (www.swordswallow.com/halloffame.php).
Comparison with endoscopic injury
The first endoscopy by Adolph Kussmaul in 1868 used mirrors and a gasoline lamp in a sword swallower,4 but rigid instruments, with their high rate of perforation, have largely been replaced.5 Patients injured during endoluminal procedures tend to be older and have pre-existing disease, the injuries usually complicating therapeutic manoeuvres.6 7 Iatrogenic perforation is sometimes not recognised until an instrument has passed well into the mediastinum of the patient, who is usually not fully conscious, and it tends to occur either adjacent to a lesion or where the pharynx narrows down to the oesophagus at or near Kilian's dehiscence.6 Most sword injuries were lower than this level, suggesting that the failure of a straight sword to negotiate the oesophageal lumen as it curves to fit the dorsal kyphosis may contribute to injury.
As in iatrogenic perforation, penetration is the main cause of injury but lacerations and scissoring injuries occur. A sword rarely passes out into the mediastinum and, although an injured swallower may realise that the performance has not proceeded smoothly, the injury may be recognised only when surgical emphysema, pain, or other symptoms develop, and there is often a delay before medical advice is sought.
Many factors, including delay and the size and site of the injury, have a bearing on outcomes. Mortality from iatrogenic perforation is quoted at 10-30%,7 8 but we did not find any deaths from sword swallowing.
Our 46 respondents collectively had swallowed over 2000 swords in the three months before we contacted them but the complications relate to their professional lifetimes. Although the risk of sustaining life threatening injury is low for an experienced swallower while relaxed and concentrating on swallowing a single sword, the risk over a career is high. The prognosis for a sword swallower who does sustain upper gastrointestinal injury seems better than for patients who suffer iatrogenic perforation.
05-03-2007, 03:32 PM
Human North American river otter (Lontra canadensis) attack.
* Potter TM,
* Hanna JA,
* Freer L.
Yale School of Forestry & Environmental Studies, 205 Prospect St, New Haven, CT 06511, USA. [email protected]
As a result of the successful restoration and conservation programs deployed by state and federal agencies, populations of the North American river otter (Lontra canadensis) are increasing in many states. Recreational activities such as swimming, boating, and fishing increase the likelihood of human interactions with this charismatic, nonendangered mustelid. Otters tend to avoid areas of high human activity, occur at low population densities, and in some habitats in the United States have not recovered from population declines. Therefore, interactions with humans are rare, and aggressive encounters by otters are even less frequent. We report a recent, aggressive, and unprovoked attack that was followed by immediate medical treatment, including postexposure rabies prophylaxis, extensive suturing, and subsequent reconstructive surgery. We discuss river otter biology, the prevalence of diseases in wild populations of river otter, and otter attacks on humans and their treatment.
PMID: 17447713 [PubMed - in process]
MOTIV8 II Challenge
-=The Big Squirrel Nut Swingers=-
05-03-2007, 05:20 PM
05-03-2007, 05:47 PM
Watch out for them river otters, lemme tell ya.
MOTIV8 II Challenge
-=The Big Squirrel Nut Swingers=-
05-03-2007, 06:07 PM
05-03-2007, 06:07 PM
05-03-2007, 06:17 PM
Self-cannibalism: an unusual case of self-mutilation.
* Ahuja N,
* Lloyd AJ.
Wallsend Community Mental Health Team, Sir G.B. Hunter Memorial Hospital, Wallsend, and School of Neurology, Neurobiology and Psychiatry, University of Newcastle upon Tyne. UK.
PMID: 17464713 [PubMed - in process]
Use of buspirone and enrichment to manage aberrant behavior in an American badger (Taxidea taxus).
* Gage LJ.
Coyote Point Museum, 1651 Coyote Point Drive, San Mateo, Califoria 94401, USA.
A captive adult female American badger (Taxidea taxus) suffered periodic episodes of agitation and self-mutilation over the course of its lifetime. Initially environmental enrichment curtailed the aberrant behavior; however, intensifying clinical signs periodically required the use of diazepam for amelioration of the problem. When diazepam treatment failed to effectively manage a series of escalating behavioral problems, alternative therapy with buspirone, an azaperone anxiolytic, was initiated. The badger was treated with 10 mg buspirone p.o. b.i.d. for over 18 mo, during which time no undesirable behaviors or noticeable side effects were observed.
PMID: 17312776 [PubMed - indexed for MEDLINE]
Male genital self-amputation in the Middle East.
* Shirodkar SS,
* Hammad FT,
* Qureshi NA.
Department of Urology, Level 9 West Dubai Hospital, PO Box 7272, Dubai, United Arab Emirates.
Genital self-mutilation, whether partial or complete, is a rare condition, which usually occurs in psychotic patients and occasionally has a religious background. The initial management of complete genital self-mutilation usually involves a formation of perineal urethrostomy or a more complex procedure to form a short penile stump. Here, we present a case of complete genital self-mutilation in a psychotic male who was managed with simple urethral spatulation to form an anterior urethrostomy.
PMID: 17457454 [PubMed - in process]
MOTIV8 II Challenge
-=The Big Squirrel Nut Swingers=-
05-03-2007, 06:20 PM
Incomplete oedipism and chronic suicidality in psychotic depression with paranoid delusions related to eyes.
* Pompili M,
* Lester D,
* Tatarelli R,
* Girardi P.
McLean Hospital - Harvard Medical School, Boston, MA, USA. [email protected].
ABSTRACT: Self-enucleation or oedipism is a term used to describe self-inflicted enucleation. It is a rare form of self-mutilation, found mainly in acutely psychotic patients. We propose the term incomplete oedipism to describe patients who deliberately and severely mutilate their eyes without proper enucleation.We report the case of a 32-year-old male patient with a five-year history of psychotic depression accompanied by paranoid delusions centered around his belief that his neighbors criticized him and stared at him. A central feature of his clinical picture was an eye injury that the patient had caused by pouring molten lead into his right eye during a period of deep hopelessness and suicidality when the patient could not resolve his anhedonia and social isolation. Pharmacotherapy and psychotherapy dramatically improved his disorder.
PMID: 17118200 [PubMed - in process]
Self-mutilation induced by cocaine abuse: the pleasure of bleeding.
* Karila L,
* Ferreri M,
* Coscas S,
* Cottencin O,
* Benyamina A,
* Reynaud M.
Universite Paris-Sud, U669, Le Kremlin Bicetre (94). [email protected]
INTRODUCTION: Self-mutilation is direct and deliberate harm to one's body without conscious intent to die. It is observed in both men and women with various psychiatric disorders, but most of those who self-mutilate are women diagnosed with borderline personality disorder. Cocaine addiction is a significant worldwide public health problem, associated with somatic, psychological, psychiatric, socioeconomic and legal complications. Amphetamine use, but not cocaine use, has previously been associated with severe self-injurious behavior. CASE: We report here a case of a female patient with recurring self-injurious behavior ("the pleasure of bleeding") induced by cocaine abuse. DISCUSSION: The clinical characteristics of self-mutilation are manifold and there is a lack of agreement about its etiology. The complex behavior associated with cocaine abuse may be one cause of self-mutilation. Dysfunction of the inhibitory brain circuitry caused by drug addiction could explain why this cocaine-addicted patient loses control and self-mutilates during cocaine use.
PMID: 17259032 [PubMed - indexed for MEDLINE]
MOTIV8 II Challenge
-=The Big Squirrel Nut Swingers=-
05-03-2007, 06:24 PM
Okay, these aren't too wierd, but it makes you cringe just thinking about it.
Bee sting of the cornea: a case study and review of the literature.
* Caca I,
* Ari S,
* Ulu K,
* Ayata A.
Department of Ophthalmology, Dicle University Faculty of Medicine, Diyarbakir, Turkey. [email protected]
Bee stings of the cornea are rarely reported, but have the potential for causing serious ophthalmological injuries. We present a case of corneal bee sting with retained stinger apparatus. A 35-year-old patient presented with an acute, corneal bee sting of the right eye 12 hours after he was stung. The patient suffered from pain, blurred vision, and epiphora. The right eye showed edema of the upper and lower eyelid, conjunctival hyperemia, chemosis, and striate keratitis of the paracentral cornea by biomicroscopic examination. The stinger was identified in the depth of the corneal infiltration. Visual acuity was 5/10. It was removed surgically. After 2 months, the eye only showed a minimal residual corneal opacification. Visual acuity was 10/10. We present a case of bee sting to the cornea with retained stinger apparatus and treatment of this unusual presentation.
PMID: 17200591 [PubMed - indexed for MEDLINE]
Subclinical endophthalmitis following a rooster attack.
* Lekse Kovach J,
* Maguluri S,
* Recchia FM.
Vanderbilt Eye Institute, Vanderbilt University Medical Center, Nashville, Tennessee 37232, USA.
Ocular injury resulting from rooster attacks is rarely reported in the literature. Sadly, the target of these attacks is most often children younger than 3 years old, whose naivete of the aggressive, territorial behavior of birds can place them at risk. Acute sequelae of these attacks can result in a lifetime of visual impairment. The possibility of a subacute or occult infection is an unusual occurrence that must always be considered. In an effort to prevent future attacks and ocular casualties, we present a case of a 12-month-old boy who suffered an open globe following a rooster attack. The open globe was emergently repaired. One week later, a white cataract was noticed on examination in the absence of systemic or ocular signs of inflammation. Traumatic endophthalmitis and lenticular abscess were suspected during examination under anesthesia. Vitrectomy, lensectomy, and injection of intravitreal antibiotics were performed. Culture of lenticular and vitreous aspirates grew alpha-streptococcus. Alpha-streptococcal endophthalmitis can result from ocular injuries caused by rooster pecking. The infection may present insidiously and without typical ocular or systemic symptoms or signs. Management is challenging and may require surgery.
PMID: 17189155 [PubMed - indexed for MEDLINE]
MOTIV8 II Challenge
-=The Big Squirrel Nut Swingers=-
05-03-2007, 06:46 PM
~ Nothing can kill the Grimace!!
05-03-2007, 07:11 PM
05-03-2007, 07:12 PM
Chen Z, Toth T, Godfrey-Bailey L, Mercedat N, Schiff I, Hauser R.
Vincent Memorial Obstetrics & Gynecology Service, Andrology Laboratory and In Vitro Fertilization Unit, Massachusetts General Hospital, Boston, Massachusetts, USA.
Although semen quality has been discussed extensively with regard to age and season in the andrology literature, the results vary and firm conclusions are still outstanding. To investigate seasonal and age-related variations in human semen parameters, we analyzed data that were collected from an andrology clinic population. We performed a retrospective review of 551 semen analysis records collected from 1989 to 2000 from the Vincent Memorial Andrology Laboratory at Massachusetts General Hospital. Semen volume, sperm concentration, total sperm count, motility, total motile sperm, and morphology significantly decreased as age increased. In addition, as age increased, the percentage of sperm with tail defects increased. Sperm concentration was significantly higher in winter (mean 157.9 million/mL) than in fall (mean 119.1 million/mL) (P <.05). The mean percentage of sperm with normal morphology was significantly higher in winter (9.2%) than in summer and spring (7.0% and 7.5%, respectively; P <.05). The mean percentage of sperm with head defects was significantly higher in fall and summer (74.0% and 72.3%, respectively) than in winter (68.6%; P <.05). Seasonal variations were found in sperm concentration and morphology, with higher sperm concentrations in winter than in fall, and a greater percentage of sperm with normal morphology in winter than in spring and summer. Sperm concentration was lowest in the fall, whereas the percentage of sperm with normal morphology was lowest in summer. Semen volume, sperm concentration, total sperm count, motility, total motile sperm, and morphology decreased as age increased.
PMID: 12634309 [PubMed - indexed for MEDLINE]
05-03-2007, 07:13 PM
Siva-Jothy MT, Stutt AD.
Evolution and Behaviour Group, Department of Animal and Plant Sciences, University of Sheffield, Sheffield S10 2TN, UK. [email protected]
Males of the bedbug, Cimex lectularius, traumatically inseminate females by inserting a needle-like intromittent organ (penis) through the female's abdominal wall after she has fed. We demonstrate that: (i) mating duration determines ejaculate size; (ii) a female's first copulation in a bout of copulations always lasts longer than subsequent copulations; (iii) the intromittent organ bears sensillae; (iv) males use their intromittent organ to 'taste' whether their current mate has recently copulated; and (v) the consequence of detecting female mating status is the reduction of copulation duration and ejaculate size. We discuss why male bedbugs might show this pattern of ejaculate-size adjustment.
PMID: 12769466 [PubMed - indexed for MEDLINE]
05-03-2007, 07:16 PM
Link to original PDF: http://zoolhonours.animals.uwa.edu.a.../Kilgallon.pdf
Summation of it from a different site:
Men who view pornographic images of two men and a woman produce better-quality sperm than men viewing pornographic images of just women, an Australian study reveals.
The finding suggests that humans may be capable of subconsciously increasing semen quality when faced with the possibility that their sperm will have to outrun those of other men in a woman’s reproductive tract.
In the study, zoologists Leigh Simmons and Sarah Kilgallon of the University of Western Australia in Perth asked 52 heterosexual men aged between 18 and 35 years to ejaculate into a container after viewing the two types of image.
The volunteers had previously abstained from sexual activity for two to six days. In samples from men who viewed the images containing the two men and a woman - the “sperm-competition” images - 52% of the sperm were motile. This compared with 49% sperm motility in the men who viewed the images of women only – a difference that was statistically significant after taking into account lifestyle factors such as cigarette smoking and alcohol consumption.
But there was also a seemingly contradictory finding. Men who viewed the sperm-competition images had fewer sperm in their ejaculate: 61 million per millilitre compared to 77 million per millilitre for the men who viewed the female-only images. More studies are needed to explain this finding.
“It’s a fascinating study. The effect is obviously immediate. This suggests that something [in the body] can be adjusted very, very quickly,” says Jon Evans of the University of New South Wales in Sydney, who studies sperm competition in guppy fish.
The findings might suggest ways to improve the quality of sperm during fertility treatment.
The postcoital struggle between sperm is well known in species in which females may mate with more than one partner. For example, male chickens allocate more sperm to an attractive hen with a large comb than an unattractive one, upping the chances that one of their sperm will get to the egg before those of other contenders. Bulls and boars used for artificial insemination by the farming industry produce better-quality semen if they are allowed to view other animals mating.
However, Simmons is not suggesting that humans regularly indulge in multiple matings. “We need to step away from that in 2005. The risk of sperm competition is very low nowadays, but in the lineage of primates that resulted in humans there was probably sperm competition,” he says
Previous studies have found that men who look at pornographic images depicting groups prefer the sorts of sperm-competition images used in the current study. Men may simply have evolved to find them more erotic so that they can respond appropriately to sperm competition, says Simmons.
The study, which examined the role of lifestyle factors, also suggested that carrying cellphones might be associated with lower sperm counts and a lower percentage of motile sperm. But previous studies in this area have been equivocal.
Journal reference: Biology Letters (doi:10.1098/rsbl.2005.0324)
05-03-2007, 08:47 PM
05-03-2007, 08:49 PM
05-03-2007, 09:20 PM
05-03-2007, 09:36 PM
05-03-2007, 10:54 PM
No, RoboDebbie, NO!
The news that Carnegie Mellon University now has a robotic receptionist is less impressive than the sad, dull pain behind the eyes one gets when considering the dreary inevitability of its name: "Roboceptionist." There's also some fairly horrifying information in the wire story about the backstory given the creature by four writers (and man, look how well that worked on "Viva Rock Vegas"): "Valerie... a drum-shaped contraption with a digitally animated face that appears on a computer display," wastes your time nattering on about "her boss, her psychiatrist and her dream of being a lounge star." The air of humanoid authenticity the designers were presumably going for actually breaks down right about there, because when was the last time you met a receptionist who was interested enough in you to do anything but stare vacantly at a point just off your left shoulder? I have met a few who are drum-shaped, but that's another story. Valerie seems to be intended for permanent installation at the university's computer science hall, but given the unpredictable nature of office staffing, I'd look for her to be replaced by an even more disengaged robotemp sometime this fall.
Source: BBC News
05-03-2007, 11:02 PM
I really hope my orginal post wins but I figured I'd throw down some more.
Vascular changes during penile erection in the dog.
C J Carati, K E Creed, and E J Keogh
Department of Clinical Biochemistry, Queen Elizabeth II Medical Centre, University of Western Australia.
Abstract1. The vascular effects of pelvic nerve stimulation on the penis were studied in dogs anaesthetized with sodium pentobarbitone and halothane. Changes in pressure and blood flow were measured through scalp vein needles inserted into the erectile bodies. 2. The penis contains two types of erectile body, which responded independently during erection induced by pelvic nerve stimulation. Pressure in the corpus spongiosum increased immediately upon stimulation, but only reached one-third of the more delayed pressure response of the corpora cavernosa. 3. At rest, arterial inflow resistance into the corpora cavernosa was high, whereas venous outflow resistance was low. Pelvic nerve stimulation (10-50 V, 10-16 Hz, 1 ms) caused an immediate increase in arterial flow, an increase in corpus cavernosal pressure (CCP), and a decrease in venous outflow. Saline infusion experiments showed there was active venous occlusion. Upon cessation of stimulation, these parameters returned to pre-stimulation levels. 4. The time taken to reach 50% of maximum change in arterial inflow was significantly less than for CCP, which was significantly less than for venous outflow. Occlusion of the aorta 1 min after cessation of stimulation decreased the pressure in the arterial tree supplying the corpora cavernosa, but CCP remained elevated, indicating that both inflow and outflow resistances were high. Thus, inflow resistance had returned to its pre-stimulation state before outflow resistance. 5. Direct measurements of blood flow through the corpus cavernosum were made with a hydrogen probe. There was a transient increase in blood inflow as CCP increased during pelvic nerve stimulation. There was some blood flow while CCP was elevated, indicating that the venous occlusion was not complete. 6. Sympathetic chain stimulation caused an increase in arterial resistance, and a decrease in CCP and venous resistance. 7. Infusions of acetylcholine (330 micrograms min-1) and vasoactive intestinal polypeptide (1-3.3 micrograms min-1) decreased arterial resistance and increased CCP and venous resistance. 8. This study suggests that during pelvic nerve-induced erection, arterial flow into the corpus cavernosum increases, followed by an increase in CCP and an actively controlled decrease in venous outflow.(ABSTRACT TRUNCATED AT 400 WORDS)
05-03-2007, 11:04 PM
Chinese men swapping tiger penis for Viagra
Men's Health News
Published: Monday, 10-Oct-2005
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Chinese men are selectively switching from traditional Chinese medicine (TCM) to Viagra to treat erectile dysfunction, but sticking with tradition for ailments such as arthritis, indigestion and gout, according to new research published in Environmental Conservation.
The finding supports a prediction made by Australian and Alaskan researchers at the advent of Viagra's commercial release in 1998 that the new impotence drug might reduce demand for several animal species that are over-harvested to treat impotence with TCMs.
Animals such as seals, sea horses and tigers have long been hunted because practitioners of TCM use their body parts for their presumed healing and virility qualities.
The researchers surveyed 256 Chinese men, aged 50 to 76, who sought treatment at a large TCM clinic in Hong Kong. The men were questioned about their previous and current use of TCM and Western treatments for arthritis, indigestion, gout and impotence.
The study's lead authors are Dr Bill von Hippel, a psychologist from the University of New South Wales (Sydney, Australia), and his brother, Dr Frank von Hippel, a biologist from the University of Alaska, Anchorage. The von Hippels cite three key findings from the research.
"First, significantly more men had formerly used a TCM treatment for impotence than were current users," says Bill von Hippel.
"Second, they were significantly more likely to be using a Western treatment for impotence than a TCM treatment.
"Finally, among men who formerly used either Western or TCM treatments for impotence, they were more likely to switch from a TCM treatment to a Western drug than vice versa. In fact, nobody had switched from a Western drug to a TCM treatment for impotence.
"This was in contrast to their behaviour with the other three ailments - arthritis, indigestion and gout, where the men were more likely to be current users of a TCM treatment than a Western treatment.".
These findings stand in contrast to prior research suggesting a mistrust of Western medicine in Asian markets.
"When we proposed that Viagra might make inroads into TCM treatments for impotence, conservationists told us we were na? and that TCM consumers were unwilling to use a product outside their own medical tradition," says Bill von Hippel. "For example, there is still strong demand for tiger bone among TCM apothecaries who use it in the treatment of pain relief, despite the widespread availability of aspirin.
"But the failure to achieve an erection isn't comparable to having a headache or the many other ailments for which consumers still prefer TCM treatments. Furthermore, Viagra differs from many other Western drugs, in that the effects are rapid and visible to the naked eye.
"The fact is that prior to the commercial availability of Viagra in 1998, no product in any medical tradition had been proven to be an effective and non-intrusive treatment of erectile dysfunction. So despite their history of using traditional medicines and their alleged suspicions of Western medicine, the men we interviewed chose the product that works best."
These findings are consistent with previous research by the von Hippels showing evidence of a post-Viagra decline during the 1990s in the harvesting of three species used in TCM impotence treatments.
The pair attributed some of this decline to Viagra, despite scepticism among many academics and wildlife experts.
In 2002, the global market for TCM products and treatments was valued at more than $20 billion, according to the Chinese firm Shenzhen Matrix Information Consulting.
UNSW: The University of New South Wales - Sydney Australia - Home page
Last edited by kjkriston; 05-03-2007 at 11:32 PM.
05-03-2007, 11:09 PM
OK I am done post whoring for the night...sure do hope I win....
March 07, 2007
Leaving a little something extra behind after sex
Female wasp spiders are a promiscuous lot. They'll have sex with several males over the course of a breeding season.
So some of the guys sacrifice their very maleness to ensure any offspring the female has is their's. The use the tip of their own genitals as a sort of chastity belt - breaking off the member during intercourse in such a way that it plugs up the female's sexual orifice.
Giving up their genitals may help save the male's life as well. The females usually attack and kill their male partners a few seconds after sex. The detaching genitals allow for a quick get-away. Read more about this study from the Universities of Bonn and Hamburg at ScienceDaily.com.
05-03-2007, 11:37 PM
We have to post a SOURCE right? That would only make the info legit instead of some retarded made up story....just a clue for those without a source credited to their posts....? Am I right?
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