性的力学

人类性行为的力学（mechanics of human sexuality）或性的力学（mechanics of sex），更正式的名称为人类性行为的生物力学（biomechanics of human sexuality），是研究人类性行为有关的力学。研究主题包括阴道组织强度的生物力学研究^[1]以及男性勃起的生物力学^[2]。一些特别环境下性行为的力学，例如外太空零重力下的性行为也是研究主题之一^[3]。

研究人员曾经研究过在插入式性行为中的男性及女性生殖器官，在1992年时曾使用医学超声检查，1999年则是用核磁共振成像，描绘性行为时生殖器官的解剖构造，而且有图像描述男性及女性生殖器官配合的情形^[4]^[5]。在利用核磁共振成像的研究中，研究者让接受研究的人员在核磁共振成像机器里面性交^[5]。核磁共振成像的影像中，阴茎的形状类似回力镖，其中阴茎根的长度占三分之一，而阴道壁紧贴著阴茎^[5]^[6]。此外，性交的核磁共振成像也指出性交时阴茎和阴道的运动，会刺激阴蒂内部的组织^[7]^[8]^[9]^[10]。这些研究指出阴蒂的重要性，并且认为称为“G点”的组织可能真的存在，因为当女性感受到性刺激，进行阴道插入式性行为时，高度神经支配的阴蒂会紧密地拉到阴道的前壁^[11]。

参考资料

^ Cosson, Michel; Lambaudie, Eric; Boukerrou, Malik; Lobry, Pierre; Crépin, Gilles; Ego, Anne. A biomechanical study of the strength of vaginal tissues. Results on 16 post-menopausal patients presenting with genital prolapse. European journal of obstetrics, gynecology, and reproductive biology. 2004, 112 (2): 201–5. PMID 14746960. doi:10.1016/S0301-2115(03)00333-6.
^ Udelson, Daniel. Biomechanics of male erectile function. Journal of the Royal Society Interface. 2007, 4 (17): 1031–48. doi:10.1098/rsif.2007.0221.
^ Boyle, Alan. Outer-space sex carries complications. MSNBC. July 24, 2006 [2017-04-17]. （原始内容存档于2013-01-11）.
^ Silverberg, Cory. Anatomy of Intercourse. About.com. August 2, 2010 [2017-04-17]. （原始内容存档于2017-07-08）.
^ ^5.0 ^5.1 ^5.2 Schultz, Willibrord Weijmar; van Andel, Pek; Sabelis, Ida; Mooyaart, Eduard. Magnetic resonance imaging of male and female genitals during coitus and female sexual arousal. BMJ. 1999, 319 (7225): 1596–600. PMC 28302 . PMID 10600954. doi:10.1136/bmj.319.7225.1596.
^ Stuttaford, Thomas; Godson, Suzi. Taking the first steps. The Times. October 6, 2007.
^ O'Connell, H.E.; Hutson, J.M.; Anderson, C.R.; Plenter, R.J. Anatomical relationship between urethra and clitoris. The Journal of Urology. 1998, 159 (6): 1892–1897. PMID 9598482. doi:10.1016/s0022-5347(01)63188-4.
^ O'Connell, H.E.; DeLancey, J.O. Clitoral anatomy in nulliparous, healthy, premenopausal volunteers using unenhanced magnetic resonance imaging. The Journal of Urology. 2005, 173 (6): 2060–2063. doi:10.1097/01.ju.0000158446.21396.c0.
^ Foldes, P.; Buisson, O. The clitoral complex: a dynamic sonographic study. J. Sex Med. 2009, 6 (5): 1223–1231. PMID 19453931. doi:10.1111/j.1743-6109.2009.01231.x.
^ Buisson, O.; Foldes, P.; Jannini, E.; Mimoun, S. Coitus as revealed by ultrasound in one volunteer couple. J. Sex Med. 2010, 7 (8): 2750–2754. doi:10.1111/j.1743-6109.2010.01892.x.
^ Buisson, O.; Jannini, E.A. Pilot echographic study of the differences in clitoral involvement following clitoral or vaginal sexual stimulation. J. Sex Med. 2013, 10 (11): 2734–2740. doi:10.1111/jsm.12279.

延伸阅读

Bondil, P; Costa, P; Daures, JP; Louis, JF; Navratil, H. Clinical study of the longitudinal deformation of the flaccid penis and of its variations with aging. European Urology. 1992, 21 (4): 284–6. PMID 1459150.
Traxer, Olivier; Haab, François; Anidjar, Maurice; Gattegno, Bernard; Cussenot, Olivier; Thibault, Philippe. Comparaison des propriétés biomécaniques de l'ancrage vaginal dans les suspensions du col vésical selon la technique de Burch et une technique percutanée [Comparison of biomechanical properties of the vaginal fixation in bladder neck suspensions according to the Burch technique and a percutaneous technique] (PDF). Progrès en Urologie. 1999, 9 (4): 727–30 [2017-04-17]. PMID 10555228. （原始内容 (PDF)存档于2013-06-03）（法语）.

[1] Cosson, Michel; Lambaudie, Eric; Boukerrou, Malik; Lobry, Pierre; Crépin, Gilles; Ego, Anne. A biomechanical study of the strength of vaginal tissues. Results on 16 post-menopausal patients presenting with genital prolapse. European journal of obstetrics, gynecology, and reproductive biology. 2004, 112 (2): 201–5. PMID 14746960. doi:10.1016/S0301-2115(03)00333-6.

[2] Udelson, Daniel. Biomechanics of male erectile function. Journal of the Royal Society Interface. 2007, 4 (17): 1031–48. doi:10.1098/rsif.2007.0221.

[3] Boyle, Alan. Outer-space sex carries complications. MSNBC. July 24, 2006 [2017-04-17]. （原始内容存档于2013-01-11）.

[4] Silverberg, Cory. Anatomy of Intercourse. About.com. August 2, 2010 [2017-04-17]. （原始内容存档于2017-07-08）.

[MRISex99-5] 5.0 ^5.1 ^5.2 Schultz, Willibrord Weijmar; van Andel, Pek; Sabelis, Ida; Mooyaart, Eduard. Magnetic resonance imaging of male and female genitals during coitus and female sexual arousal. BMJ. 1999, 319 (7225): 1596–600. PMC 28302 . PMID 10600954. doi:10.1136/bmj.319.7225.1596.

[TimesMRI-6] Stuttaford, Thomas; Godson, Suzi. Taking the first steps. The Times. October 6, 2007.

[oconnell1998-7] O'Connell, H.E.; Hutson, J.M.; Anderson, C.R.; Plenter, R.J. Anatomical relationship between urethra and clitoris. The Journal of Urology. 1998, 159 (6): 1892–1897. PMID 9598482. doi:10.1016/s0022-5347(01)63188-4.

[oconnell2005-8] O'Connell, H.E.; DeLancey, J.O. Clitoral anatomy in nulliparous, healthy, premenopausal volunteers using unenhanced magnetic resonance imaging. The Journal of Urology. 2005, 173 (6): 2060–2063. doi:10.1097/01.ju.0000158446.21396.c0.

[foldes2009-9] Foldes, P.; Buisson, O. The clitoral complex: a dynamic sonographic study. J. Sex Med. 2009, 6 (5): 1223–1231. PMID 19453931. doi:10.1111/j.1743-6109.2009.01231.x.

[buisson2010-10] Buisson, O.; Foldes, P.; Jannini, E.; Mimoun, S. Coitus as revealed by ultrasound in one volunteer couple. J. Sex Med. 2010, 7 (8): 2750–2754. doi:10.1111/j.1743-6109.2010.01892.x.

[buisson2013-11] Buisson, O.; Jannini, E.A. Pilot echographic study of the differences in clitoral involvement following clitoral or vaginal sexual stimulation. J. Sex Med. 2013, 10 (11): 2734–2740. doi:10.1111/jsm.12279.

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