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Glans penis

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({{GraphicWarning}}In male human anatomy, the '''glans penis'''(or simply glans, /ɡlænz/)[1] is the sensitive bulbous structure at the distal end of the [[penis]]. The following text glans is quoted from anatomically homologous to the English [http://en[clitoral glans]] of the human female.wikipediaTypically, the glans is completely or partially covered by the [[foreskin]], except in men who have been [[circumcised]], though the [[foreskin]] can generally be retracted over and past the glans.org/wiki/Glans_penis Wikipedia]:'')
<blockquote>In male human anatomy, the '''glans penis''' (or simply glans, /ɡlænz/)[1] is the sensitive bulbous structure at the distal end of the [[Image:Glans side.jpg|right|thumb|Human penis]]. The glans is anatomically homologous with its foreskin retracted to expose the clitoral glans of the human female. Typically, the glans is completely or partially covered by the [[foreskin]], except in men who have been circumcised, though the [[foreskin]] can generally be retracted over and past the glans.</blockquote>
The glans penis, or simply the glans, refers to the ''head of the penis''. The glans is normally covered by a hood of folded [[skin]] called the [[foreskin]]. The foreskin moisturizes the glans penis by [[transudation]]. The surface of the glans is mucosal tissue that, under normal conditions, is moist and supple. If left uncovered for long periods of time, the surface of the glans becomes desiccated. In the [[circumcised]] penis, the glans is permanently exposed; the surface of the glans dries out and develops layers of [[keratinization|keratin]] and loses sensation.
----The glans penis receives much of its blood supply through the [[frenular artery]].
==First retraction of the foreskin==
{{FromIntactWiki|URL=http://intactwikiFunctions of the [[foreskin]] include protecting the glans penis from abrasion and moistening it with body oils and moisture to keep it moist and sensitive.org/wiki/Glans_Penis|Title<ref name=Glans Penis}}"fleiss-hodges-vanhowe1998">{{Construction SiteFleissP HodgesF VanHoweRS 1998}}</ref>
[[Image:Glans side.jpg|right|thumb|Human It is normal for the glans penis (head of the penis with its ) to be very sensitive to touch when the foreskin is retracted for the first time since birth. There is no particular reason to expose touch the head so, if it is sensitive to touch, then one may simply avoid touching it. Keeping the foreskin forward in its protective position over the glanspenis also prevents pain.]]
The ==Sensitivity and innervation of the glans penis, or simply ==Cepeda-Emiliani et al. (2023) reported the glans, refers to penis has dual innervation from both the head of the penisdorsal and perineal nerves. The glans is usually covered by a hood <ref name="cepeda2023">{{REFjournal |last=Cepe da-Emiliani |first= |init=A |author-link=Alfonso Cepeda-Emiliani |last2=Gándara-Cortés |first2= |init2=M |author2-link= |last3=Otero-Alén |first3= |init3=M |author3-link= |last4=García |first4= |init4=H |author4-link= |last5=Suárez-Quintanilla |first5= |init5=J |author5-link= |last6=García-Caballero |first6= |init6=T |author6-link= |last7=Gallego |first7= |init7=R |author7-link= |last8=García-Caballero |first8= |init8=R |author8-link= |etal=no |title=Immunohistological study of flesh called the [[foreskin]]. The surface density and distribution of the glans is mucosal human penile neural tissue that, under normal conditions, is moist and supple: gradient hypothesis |trans-title= |language= |journal= Int J Impot Res |location= |date=2023-05-02 |volume=35 |issue=3 |article= |page= |pages=286-305 |url=https://www. If left uncovered for long periods of time, the surface of the glans begins to dry outnature. In the [[circumcisioncom/articles/s41443-022-00561-9 |archived= |quote= |pubmedID=35501394 |circumcised]] penis, the glans is permanently exposed; the surface of the glans dries out and develops layers of [[keratinizationpubmedCID= |keratin]]DOI=10.1038/s41443-022-00561-9 |accessdate=2023-11-24}}</ref>
==Sensitivity The human glans penis has virtually no fine touch sensation and can only sense deep pressure and pain at a high threshold. This was first reported by the inventor of the aesthesiometer,<!-- <ref>{{Von (1894)}} | [[Template:Von (1894)|see more]]</p></ref> --> and enervation led Sir Henry Head to make his famous comparison with the back of the glans penis ==heel.<!-- <ref>{{Head (1920)}} | [[Template:Head (1920)|see more]]</p></ref> -->
The human glans penis has virtually no fine touch sensation [[dartos|dartos muscle sheet]] in the [[foreskin]] produces contractions that are slow, sustained, and can only sense deep pressure and pain at a high thresholdmay produce great force, such as in cold temperatures. This was first reported by the inventor of the aesthesiometer,<refname="jefferson1916">{{Von (1894)}} | Jefferson G. [[Templatehttp:Von (1894)|see more]]</p></ref> and led Sir Henry Head to make his famous comparison with www.cirp.org/library/anatomy/jefferson/ The peripenic muscle; some observations on the back anatomy of the heelphimosis].<ref>{{Head ''Surgery, Gynecology and Obstetrics'' 1916 Aug;23(19202)}} | [[Template:Head (1920)|see more]]</p>177-81.</ref>
The dartos muscle sheet in the foreskin produces contractions that are slow, sustained, and may produce great force, such as in cold temperatures.<ref>Jefferson G. The peripenic muscle; some observations on the anatomy of phimosis. Surgery, Gynecology and Obstetrics 1916 Aug;23(2):177-81.</ref>The innervation of the glans responds to pressure hence the glans are meant to be stimulated with the [[foreskin ]] as its medium.
While the human glans penis is protopathic, the prepuce contains a high concentration of touch receptors in the [[ridged band.<ref>{{Cold and McGrath (1999)}} | [[Template:Cold and McGrath (1999)|see more]]</p></ref>.
In the human [[penis]], the prepuce is known to have ten times more corpuscular sensory receptors than the glans penis.<ref>{{Halata_(1986)}} | [[Template:Halata_(1986)|see more]]</p></ref>
Most people are surprised to learn that the glans penis is one of the least sensitive parts of the entire body.<refname="halata1985">Halata Z, Munger BL. [http://www.cirp.org/library/anatomy/halata/ The Neuroanatomical basis for the protopathic sensibility of the human glans penis]. ''Brain res Res'' 1986 Apr 23;371(2):205-30.</ref>The glans is insensitive to light touch, heat, cold, and even pinpricks, as researches at the Department of Pathology in the Health Scientists centre Science Centre at the {{UNI|University of Manitoba |UManitoba}} discovered<refname="taylor1996">Taylor JR, Lockwood AP, Taylor AJ. The prepuce: specialized musocsa of the penis and its loss to circumcision. Br J Urol {{TaylorJR LockwoodAP TaylorAJ 1996 Feb;77(2): 291-5}}</ref>
The corona of the glans contains scattered free nerve endings, genital end bulbs, and pacinian corpuscles, which transmit sensations of pain and deep pressure. The glans is nearly incapable of detecting light touch.
The results of a fascinating study conducted by Dr. [[Christopher J. Cold ]] and Dr. [[Ken McGrath|Kenneth A. McGrath ]] demonstrate that the human [[foreskin in ]] is an evolutionary advancement over the foreskins of other primates. The human [[foreskin ]] is far more sophisticated and responsive, as their comparative anatomy studies prove. This is seen most clearly in the evolutionary increase in corpuscular innervation and simultaneous decrease in corpuscular receptors in the human glans relative to the innervation of the foreskin and glans of lower primates.<ref>Cold CJ, [[Ken McGrath|McGrath KA]]. [http://www.cirp. org/library/anatomy/cold-mcgrat/ Anatomy and histology of the penile and clitoral prepuce in primates: an evolutionary perspective of the specializes sensory tissue of the external genitalia]. In: Denniston GC, Hoges Hodges MF, Milos FM (eds). ''Male and female circumcision: Medical, Legal, and Ethical Considerations in Pediatric Practice''. New York: Kluwer Academic/Plenum Publishers, 1999. pp. 19-29</ref>In other words, in monkeys and apes, the glans is more sensitive then the foreskin. In humans, this is reversed, so that the foreskin is more sensitive then the glans.  An impressive study performed by objective Chinese researchers conclusively demonstrated that circumcision reduces the glans sensitivity to vibration. "The test group were 1.97 +/- 0.71, 2.64 +/- 1.38, 3.09 +/-1.46 and 2.97 +/- 1.20 respectively before and 1, 2 and 3 months after circumcision, with significant difference between pre- and post-operation (P < 0.05)."(1)<ref>Yang, D.-M., Lin, H., Zhang, B., & Guo, W. (2008). Circumcision affects glans penis vibration perception threshold. Zhonghua nan ke xue National journal of andrology, 14(4), 328-330. http://www.ncbi.nlm.nih.gov/sites/entrez?Db=pubmed&Cmd=Retrieve&list_uids=18481425&dopt=abstractplus. Retrived May 17 2011 </ref>
In other words, in monkeys and apes, the glans is more sensitive then the foreskin. In humans, this is reversed, so that the [[foreskin]] is more sensitive then the glans.
]
An impressive study performed by objective Chinese researchers conclusively demonstrated that [[adult circumcision| circumcision]] reduces the glans sensitivity to vibration. "The test group were 1.97 +/- 0.71, 2.64 +/- 1.38, 3.09 +/-1.46 and 2.97 +/- 1.20 respectively before and 1, 2 and 3 months after circumcision, with significant difference between pre- and post-operation (P < 0.05).<ref name="young2008">{{REFjournal
|last=Yang
|first=
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|last2=Lin
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|last3=Zhang
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|last4=Guo
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|title=[Circumcision affects glans penis vibration perception threshold]
|trans-title=
|language=Chinese
|journal=Zhonghua Nan Ke Xue
|date=2008-04
|volume=14
|issue=4
|pages=328-30
|quote=https://www.ncbi.nlm.nih.gov/pubmed/18481425?dopt=Abstract
|pubmedID=18481425
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}}</ref>
{{SEEALSO}}
* [[Sexual effects of circumcision]]
{{REF}}
[[Category:Genital]]
[[Category:Penile anatomy]]
[[Category:Physiology]]
[[Category:From Intactipedia]]
[[Category:From IntactWiki]]
 
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