The somatosensory representation of the human clitoris: an fMRI study.

Details

Serval ID
serval:BIB_1AAA775CF021
Type
Article: article from journal or magazin.
Collection
Publications
Title
The somatosensory representation of the human clitoris: an fMRI study.
Journal
Neuroimage
Author(s)
Michels L., Mehnert U., Boy S., Schurch B., Kollias S.
ISSN
1095-9572 (Electronic)
ISSN-L
1053-8119
Publication state
Published
Issued date
2010
Volume
49
Number
1
Pages
177-184
Language
english
Notes
Publication types: Journal ArticlePublication Status: ppublish
Abstract
We studied the central representation of pudendal afferents arising from the clitoral nerves in 15 healthy adult female subjects using electrical dorsal clitoral nerve stimulation and fMRI. As a control body region, we electrically stimulated the right hallux in eight subjects. In a block design experiment, we applied bilateral clitoral stimulation and unilateral (right) hallux stimulation. Activation maps were calculated for the contrasts 'electrical dorsal clitoral nerve stimulation versus rest' and 'electrical hallux stimulation versus rest'. A random-effect group analysis for the clitoral stimulation showed significant activations bilateral in the superior and inferior frontal gyri, insulae and putamen and in the postcentral, precentral and inferior parietal gyri (including the primary and secondary somatosensory cortices). No activation was found on the mesial surface of the postcentral gyrus. For the hallux, activations occurred in a similar neuronal network but the activation in the primary somatosensory cortex was localized in the inter-hemispheric fissure. The results of this study demonstrate that the central representation of pudendal afferents arising from the clitoral nerves and sensory inputs from the hallux can be studied and distinguished from each other by fMRI. From the somatotopic order described in the somatosensory homunculus one would expect for electrical clitoral nerve stimulation activation of the mesial wall of the postcentral gyrus. In contrast, we found activations on the lateral surface of the postcentral gyrus.
Keywords
Adult, Clitoris/innervation, Clitoris/physiology, Electric Stimulation, Female, Humans, Image Processing, Computer-Assisted, Magnetic Resonance Imaging, Sexual Behavior/physiology, Somatosensory Cortex/physiology, Young Adult
Pubmed
Web of science
Create date
05/11/2014 12:12
Last modification date
20/08/2019 12:51
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