Women's clitoris, vagina, and cervix mapped on the sensory cortex: fMRI evidence.
Women's clitoris, vagina, and cervix mapped on the sensory cortex: fMRI evidence.
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DOI：
10.1111/j.1743-6109.2011.02388.x
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发表时间：
2011-10
期刊：
影响因子：
--
通讯作者：
Brody S
中科院分区：
文献类型：
--
作者：
Komisaruk BR;Wise N;Frangos E;Liu WC;Allen K;Brody S
人类的阴道、子宫颈和乳头向感觉皮层的投射尚未见报道。绘制阴蒂、阴道、宫颈和乳头的感觉皮质区域，以阐明性反应背后的神经系统。使用功能性磁共振成像（fMRI），我们绘制了感觉皮层对阴蒂、阴道、宫颈和乳头自我刺激的反应。对于小拇指的参考点，我们也绘制了拇指和大脚趾（拇趾）刺激的反应图。被各种感觉刺激激活的大脑区域的功能磁共振成像。阴蒂、阴道和宫颈的自我刺激激活可区分的感觉皮质区域，所有这些区域都聚集在内侧皮层（内侧中央旁小叶）。乳头自我刺激激活了生殖器感觉皮层（以及胸部）的侏儒图区域。生殖器感觉皮层，在经典的彭菲尔德小丘中发现，仅基于男性大脑的电刺激，在文献中首次被女性研究证实，应用阴蒂、阴道和宫颈自我刺激，并使用功能磁共振成像观察其区域大脑反应。阴道、阴蒂和颈部的激活区域是可区分的，这与不同传入神经和不同行为相关因素的神经支配一致。通过乳头自我刺激激活生殖器感觉皮层是出乎意料的，但这表明了女性报告其性欲质量的神经学基础。
The projection of vagina, uterine cervix, and nipple to the sensory cortex in humans has not been reported. To map the sensory cortical fields of the clitoris, vagina, cervix and nipple, toward an elucidation of the neural systems underlying sexual response. Using functional Magnetic Resonance Imaging (fMRI) we mapped sensory cortical responses to clitoral, vaginal, cervical, and nipple self-stimulation. For points of reference on the homunculus, we also mapped responses to the thumb and great toe (hallux) stimulation. fMRI of brain regions activated by the various sensory stimuli. Clitoral, vaginal, and cervical self-stimulation activate differentiable sensory cortical regions, all clustered in the medial cortex (medial paracentral lobule). Nipple self-stimulation activated the genital sensory cortex (as well as the thoracic) region of the homuncular map. The genital sensory cortex, identified in the classical Penfield homunculus based on electrical stimulation of the brain only in men, was confirmed for the first time in the literature by the present study in women, applying clitoral, vaginal, and cervical self-stimulation, and observing their regional brain responses using fMRI. Vaginal, clitoral, and cervical regions of activation were differentiable, consistent with innervation by different afferent nerves and different behavioral correlates. Activation of the genital sensory cortex by nipple self-stimulation was unexpected, but suggests a neurological basis for women’s reports of its erotogenic quality.
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