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Evolution of the foreskin

226 bytes removed, 17 May
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|title=The Case Against Circumcision
|journal=Mothering: The Magazine of Natural Family Living
|season=Winter
|volume=
|issue=
|pages=36-45
|url=httphttps://www.mothersagainstcirccirp.org/fleissnews/1997/1997-12-01_Mothering.htmlphp
|quote=
|pubmedID= |pubmedCID= |DOI=
|date=1997
|accessdate=2024-12-22
}}</ref>
|year=1859
|title=The Origin of Species
|chapter=Chapter Four: Natural Selection |url=[https://www.gutenberg.org/files/1228/1228-h/1228-h.htm#chap04Chapter Four: Natural Selection] |url=
|scope=
|location=London
|pubmedID=8771059
|pubmedCID=
|DOI=10.1016/0306-9877(95)90248-1
|date=1995
|accessdate=2024-12-22
|issue=
|pages=335-374
|url=https://muse.jhu.edu/article/402394
|quote=
|pubmedID=2188210
|pubmedCID=
|DOI=10.1353/pbm.1990.0008
|date=1990
|accessdate=2024-12-22}}</ref> The human [[penis]] has retained and modified its prepuce over a an extraordinary period of extraordinarily evolution.<ref>{{REFjournal
|last=Dixson
|init=AF
|issue=1
|pages=51-60
|url=https://onlinelibrary.wiley.com/doi/10.1002/ajp.1350130107
|quote=
|pubmedID=2188210
|pubmedCID=
|DOI=10.1002/ajp.1350130107
|date=1987
|accessdate=20102024-0612-22
}}</ref> The rapid divergence in external genital anatomy between humans and ancestral apes is thought to have occurred in the last seven million years.<ref name="cold-mcgrath"/>
[[Image:Rhesus-Monkey-&-Human-Penis.gif]]
The rhesus monkey has fewer corpuscular receptors in the prepuce (foreskin) and more corpuscular receptors in the glans (head). In humans, however, the [[glans penis]] has few corpuscular receptors and predominant free nerve endings,<refname="halata1997">{{REFjournal |last=Halata, |first= |init=Z, & |author-link= |last2=Spaethe, |first2= |init2=A. (1997). |author2-link= |etal=no |title=Sensory innervation Innervation of the human penis. Plenum Press.</ref><ref nameHuman Penis |trans-title= |language= |journal=Adv Exp Med Biol |location= |date=1997 |season= |volume=424 |issue= |article= |page= |pages= |url="halta86">Halata, Z, & Munger, B. (1986). [https://d1wqtxts1xzle7cirp.cloudfront.netorg/library/anatomy/47139534halata2/0006-8993_2886_2990357-420160710-21337-1czck3b-libre.pdf?1468265379 |archived= |quote=&response-content-disposition |pubmedID=inline%3B+filename%3DThe_neuroanatomical_basis_for_the_protop.pdf&Expires9361804 |pubmedCID=1734892546&Signature |DOI=O~Vq~9NOh5xvfzPrJW4djV0J10wBmjXpWzur15ePWMk3JdOLkzQzgojJ2LCa3gic10.1007/978-AbH2aMoAXz69A917N6mz1-SEK5sHcaLXV0ErNuukCgDx4615-pGv2VIkGc2fSAF349SNap8Q~I7hejjIxeAu0jUQAfAbPye9XhNicmpCxEgsC~esFLs~pmEL9iUu5913-7hjxEk0XlANYkgZgDlqD5D3W7v4lMwDy5EWDm5Q4dNdDpmj0vlFomHt3SBXkjlkFp6e7L9_48 |accessdate=2024-AFtaenKaEgLUZ~RYC5IylmO58vdCIlUFme4-AVlK7iSPDr0NlA0hC2w8ThUEVt0BORntmbVxt-OmJA2gXGD7nDw__&Key-Pair-Id=APKAJLOHF5GGSLRBV4ZA The neuroanatomical basis for the protopathic sensibility of the human glans penis]. Brain Res, 34(506)</ref> consistent with protopathic sensibility. Protopathic simply refers to a low order of sensibility (consciousness of sensation), such as to deep pressure and pain, that is poorly localised. The human glans penis has virtually no fine touch sensation and can only sense deep pressure and pain at a high threshold.<ref>Von, F.M. (1894). Beiträge zur Physiologie des Schmerzsinns. Akad Wiss Leipzig Math.12-Naturwiss Kl Ber.22}}</ref><ref name="macaca"/> While the human [[glans penis]] is protopathic, the [[prepuce]] contains a high concentration of touch receptors in the [[Ridged band|ridged band]].<ref name="cold-mcgrath"/>
In the human [[penis]], the [[prepuce]] is known to have ten times more corpuscular sensory receptors than the [[glans penis]].<ref name="halta86halata1986">{{REFjournal |last=Halata |first= |init=Z |author-link= |last2=Munger |first2= |init2=BL |author2-link= |etal=no |title=The neuroanatomical basis for the protopathic sensibility of the human glans penis |trans-title= |language= |journal=Brain Res |date=1986-04-23 |volume=371 |issue=2 |pages=205-30 |url= |archived= |quote= |pubmedID=3697758 |pubmedCID= |DOI=10.1016/0006-8993(86)90357-4 |accessdate=2024-12-22}}</ref>
The male and female prepuce has persisted in all primates, which strongly supports the contention that the [[prepuce]] is valuable genital sensory tissue. The corpora cavernosa and the prepuce are the only two universally common characteristics of the primate penis.<ref name="cold-mcgrath"/><ref name="macaca"/> While the human [[glans penis]] is protopathic, the [[prepuce]] contains a high concentration of touch receptors in the [[Ridged band|ridged band]].<ref name="cold-mcgrath"/>
=== Further reading ===
* {{REFbook
|last=Denniston
}}
[[Image:The-Descent-of-Man-and-Selection-in-Relation-to-sex.gif|100x130px200x260px]][[Image:Primate_Origins_and_Evolution.gif‎|100x130px200x260px]][[Image:Perspectives_in_biology_and_medicine.gif‎|100x130px200x260px]][[Image:America_Journal_of_Primatology.gif‎|100x130px200x260px]][[Image:Studies_In_Neurology.gif‎|100x130px200x260px]][[Image:Why_Sex_Is_Fun.gif‎|100x130px200x260px]][[Image:Mothering.gif‎|100x130px200x260px]]
=== Videos ======= Functions of The Foreskin - Part 1 ====
<youtube>http://www.youtube.com/watch?v=r9DoCn3gATE</youtube>
==== Functions of The Foreskin - Part 2 ====
<youtube>http://www.youtube.com/watch?v=Ps1dkbcOKfA</youtube>
 
{{SEEALSO}}
* [[Foreskin sensitivity]]
* [[Penis]]
 
{{LINKS}}
* * {{REFweb |url=httphttps://www.intactaus.org/information/functionsoftheforeskinfunctions-of-the-foreskin/
|title=Functions of the Foreskin
|last=Helard
|quote=
}}
 
{{REF}}
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