Pedo amygdala

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I did a poor job asking pubmed for the paper Razib mentioned earlier, but this surely does look interesting:

Brain pathology in pedophilic offenders: evidence of volume reduction in the right amygdala and related diencephalic structures.
Kolja Schiltz, Joachim Witzel, Georg Northoff, Kathrin Zierhut, Udo Gubka, Hermann Fellmann, Jörn Kaufmann, Claus Tempelmann, Christine Wiebking, Bernhard Bogerts

CONTEXT: Pedophilic crime causes considerable public concern, but no causative factor of pedophilia has yet been pinpointed. In the past, etiological theories postulated a major impact of the environment, but recent studies increasingly emphasize the role of neurobiological factors, as well. However, the role of alterations in brain structures that are crucial in the development of sexual behavior has not yet been systematically studied in pedophilic subjects. OBJECTIVE: To examine whether pedophilic perpetrators show structural neuronal deficits in brain regions that are critical for sexual behavior and how these deficits relate to criminological characteristics. DESIGN: Amygdalar volume and gray matter of related structures that are critical for sexual development were compared in 15 nonviolent male pedophilic perpetrators (forensic inpatients) and 15 controls using complementary morphometric analyses (voxel-based morphometry and volumetry). Psychosocial adjustment and sexual offenses were also assessed. RESULTS: Pedophilic perpetrators showed a significant decrease of right amygdalar volume, compared with healthy controls (P = .001). We observed reduced gray matter in the right amygdala, hypothalamus (bilaterally), septal regions, substantia innominata, and bed nucleus of the striae terminalis. In 8 of the 15 perpetrators, enlargement of the anterior temporal horn of the right lateral ventricle that adjoins the amygdala could be recognized by routine qualitative clinical assessment. Smaller right amygdalar volumes were correlated with the propensity to commit uniform pedophilic sexual offenses exclusively (P = .006) but not with age (P = .89). CONCLUSIONS: Pedophilic perpetrators show structural impairments of brain regions critical for sexual development. These impairments are not related to age, and their extent predicts how focused the scope of sexual offenses is on uniform pedophilic activity. Subtle defects of the right amygdala and closely related structures might be implicated in the pathogenesis of pedophilia and might possibly reflect developmental disturbances or environmental insults at critical periods

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23 Comments

  1. Subtle defects of the right amygdala and closely related structures might be implicated in the pathogenesis of pedophilia and might possibly reflect developmental disturbances or environmental insults at critical periods. 
     
    That conclusion is a pretty safe one. When someone is exclusively attracted to sex partners that can never produce offspring a heritable gene seems an unlikely candidate. In the case of pedophiles they are universally reviled. There aren’t sizable pressure groups powerful enough to steer science in the wrong direction.

  2. Awhile ago I reviewed some suggestive evidence that pedophilia could partly reflect early brain damage, perhaps an infection of the brain: 
    http://www.gnxp.com/blog/2007/02/left-handedness-and-pedophilia-brain.php

  3. There is increasing evidence that the amygdala is lateralized. Three authors come to mind: Gerendai, Cooke, and Cahill’s more recent fMRI work.  
     
    There is also evidence that focal lesions can be associated with pedophilia, such as in multiple sclerosis, but I cannot find that paper in my library. More later…

  4. When someone is exclusively attracted to sex partners that can never produce offspring a heritable gene seems an unlikely candidate. 
     
    This definition also applies to ordinary gay people. 
    Does your conclusion extend to this population?

  5. Most Pedos are usually white males. If this is a heritable gene, can we assume that the white population has not fully evolved yet?

  6. Lance, 
     
    What statistics do you have that pedos are usually white males?

  7. http://transcripts.cnn.com/TRANSCRIPTS/0203/04/lkl.00.html 
     
    WALSH: Absolutely.  
     
    KING: Are pedophiles mostly white?  
     
    WALSH: Mostly white, mostly white, absolutely.  
     
    KING: Any reason for that?  
     
    WALSH: I don’t know. There are black and Asian pedophiles. There are people of all races.  
     
    KING: Less percentage wise?  
     
    WALSH: Less percentage wise. Most the guys I track on “America’s Most Wanted” are white.  
     
    http://www.topix.net/forum/city/los-angeles-ca/TKO0KKRV910MFUUT9 
    That White female who molested her young student in Florida got off with no jail time. Research the female teachers who have molested children and they are numerous and almost without exception White women pedophiles. And the male White sexual molesters are all over the map and do horrendous acts upon their victims.

  8. Looc: When someone is exclusively attracted to sex partners that can never produce offspring…. 
     
    How do you — or the researchers — define pedophilia? If you’re talking about men who are attracted to boys/young men or pre-pubescent children, then you’re right — those sex partners are obviously not going to produce offspring. But, some pedophiles are interested in girls aged 9, 10, 11, 12 … many of them are able to conceive or are on the verge of being able to do so. (Also, some societies consider men who are interested in 15 or 16 year-old girls to be pedophiles — obviously that is far out.)

  9. If this is a heritable gene, can we assume that the white population has not fully evolved yet? 
     
    only tards say shit like ‘fully evolved.’

  10. I was watching Chris Hansen”s to catch a predator. 
     
    The Mexican said “Im going to marry her if she likes” 
     
    I was like, weird, he thinks that this is Mexico, where reputation is a priority among women. If he marries the girl,  
    he gets to have a very young sex partner. 
     
    I would guess its a cultural thing? That there are more white pedophiles because they are afraid of child bearing women?  
    Free sex, no child support?

  11. BR 
     
    This definition also applies to ordinary gay people. Does your conclusion extend to this population? 
     
    What is the adaptive value of an exclusive, lifelong, homosexual orientation? Its a gene crusher. An environmental injury is the most reasonable explanation for this phenotype.

  12. Theresa 
     
    I don’t know how they define pedophilia but being attracted to partners that can’t reproduce makes no Darwinian sense. 
     
    If a guy is attracted to 16 year old girls it could potentially be some sort of skeezy, survival strategy. 
     
    Sort of like Amway.

  13. Razib, I was asking a question following the comment on “heritability”, not making a statement.  
    Geez, youd think youre the tard police. :) 
    Then someone asked for statistics, I provided it. Why be PC?  
    Why cant you talk about something so obvious?

  14. Lance = razib 
     
    razib thinks he is very clever.

  15. This reminds me of For the Law, Neuroscience Changes Nothing and Everything. But then again, almost everything does.

  16. 1)Pedophile has brain damage caused by pathogen 
    2)Brain damage makes kids look attractive 
    3)Pedophile molests young boy 
    4)Pathogen spreads like an STD and infects boy 
    5)Boy gets brain damage 
    6)Boy grows up and becomes pedophile 
    7)Cycle repeats 
     
    Could this be some sort of freakish combination of Syphilus and Rabies? 
     
    It would certainly explain why victims of child abuse become abusers in such great numbers. The pathogen might know what it is doing.

  17. But there would have to be an advantage to spreading to children. Otherwise, the strategy makes absolutely no sense – it would be far more useful to make the victim hypersexual and/or disinhibited a la syphilus.

  18. Would some one please define the term ‘pedophile’ absolutely and independent of local cultural norms. 
     
    Reduced grey matter is also the result of various forms of headaches eg cluster headaches. 
     
    http://www.google.co.uk/search?hl=en&q=headaches+reduction+in+grey+matter&meta=

  19. Then someone asked for statistics, I provided it. 
     
    Uh, someone asked for statistics and you provided a transcript of the Larry King show or something. Seems trollish, I sense a ban in your future. 
     
    Lance = razib 
     
    The internet supply of morons is ample enough that going to the effort of creating faux morons would be a colossal waste of time. 
     
    All this aside, it’s entirely possible that pedophilia is more prevalent among one race of people than another. But (echoing jaspa) I would first want to define the term clearly, and then try to determine whether pedophilia is a distinct syndrome, a spectrum disorder (i.e. just the extreme tail end of a distribution of different preferences for youthfulness in a mate), or a particularly unfortunate fetish. It would be interesting to compare the brains of the pedophiles with those of others who had unusual (seemingly maladaptive) sexual fetishes and see whether there were similar anomalies.

  20. As for non-white pedophiles, there are certainly plenty of them in Japan. When I was there, one could easily find lolicon manga & photo shoots of underage idols in swimsuits in ordinary book stores easily enough.

  21. The internet supply of morons is ample enough that going to the effort of creating faux morons would be a colossal waste of time. 
     
    You’d think so, but you wouldn’t be razib. He and gc both have a history of pseudonymous anti-white trolling.  
     
    In this Dateline segment, strangely one of those white pedophiles is dressed like a Sikh and named Inderjeet Singh. Notice how the smug, unrepentant subcon’s expression changes once he’s handcuffed. I recall another hilarious TCAP that reeled in an attempted pedo who looked and talked like he could be razib’s brother. 
     
    Anyway, I find it incredibly unlikely (to say the least) whites are overrepresented among pedophiles. At worst, they may be represented at something approaching their proportion of the population. Blacks make up “only” something like 20% of American serial killers, so we get to hear various anti-white types constantly claim “all serial killers are white”.

  22. Lance  
    I was watching Chris Hansen”s to catch a predator. 
     
    The Mexican said “Im going to marry her if she likes”
     
     
    For actual data, like statistics etc. …. 
    From Sexuality & Culture; Summer2005, YOUNG, UNASSIMILATED HISPANIC OFFENDERS: ABSOLUTIST VS. RELATIVIST CULTURAL ASSUMPTIONS 
     
    California State Law §288(a) defines any sexual contact between a person 18 or older with someone under the age of 14 as illegal and punishable by incarceration. Data from the State Department of Justice shows that Young, Unassimilated Hispanic Offenders (YUHO) are arrested for these crimes at rates disproportionately greater than their numbers in the population. Through a review of the pertinent literature and clinical archives, we argue that YUHOs have been acculturated into a sexual morality that violates legally codified American sexual standards.

  23. What statistics do you have that pedos are usually white males? 
     
    Here’s stats which show that ‘pedos’ are usually white males, but only because the US population is 80.2% white (US Census): 
     
    http://www.ncjrs.gov/pdffiles1/ojjdp/191028.pdf 
     
    “Offenders against juveniles in State prisons differed from offenders against adults in many other ways, including race, gender, age, and marital status. The majority of offenders against juveniles were white; they accounted for 73 percent of those who had victimized children and 56 percent of those who had victimized teens. In contrast, the majority of incarcerated offenders against adults (59 percent) were nonwhite. Although the overall prison population of violent offenders was almost equally divided between white and black inmates, more white offenders (30 percent) than black offenders (13 percent) had committed crimes against juveniles (figure 3). In terms of gender, women made up only a small fraction (4 percent) of the incarcerated population for violent crimes of any sort. However, they were somewhat overrepresented (6 percent) among offenders against children age 12 or younger and underrepresented (only 1 percent) among those who had victimized teens ages 13ñ17. It is unclear whether this representation is due to the actual incidence of crimes committed by females or to the way in which the justice system deals with their crimes.”

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