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Modern magnetic resonance imaging allows exploration of aspects of living anatomy. Anatomical relationship between urethra and clitoris. Setting University hospital in the Netherlands. In all the experiments this phenomenon occurred in this coital position and was not related to the depth of penetration.

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Details of the vaginal wall, the urethra, and the bulbs of the vestibule were unfortunately beyond the resolution of our current equipment. After that image was taken the woman restarted the stimulation to achieve an orgasm. The participants pairs of men and women were recruited by personal invitation and through a local scientific television programme. Their interpretation may have been caused by the raising of the uterus or filling of the bladder during their experiments. We used magnetic resonance imaging to study the anatomy and physiology of human sexual intercourse. Open in a separate window. Leonardo, the anatomy.

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In Riley et al published an ultrasound study on copulation. Six couples succeeded in partial, though not complete, penetration experiments 3 and We did not foresee that the men would have more problems with sexual performance maintaining their erection than the women in the scanner. It was not possible on these magnetic resonance images to distinguish between the vaginal wall, the urethra, and the clitoris.

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Description: Histological studies 11 , 12 and immunohistochemistry 13 have shown that the anterior wall of the vagina has denser innervation than the posterior wall. Vaginal sensitivity to electric stimuli, theoretical and practical implications. In his treatise Genesis and Development of a Scientific Fact he states. At the end of the experiment, the images were evaluated in the presence of the participants. The uterus was raised by 2. During female sexual arousal without intercourse the uterus was raised and the anterior vaginal wall lengthened. WWS initiated and coordinated the formulation of the study hypothesis, designed the protocol, and participated in data collection, interpretation of the findings, and writing of the paper. he is guarantor of the study. Conclusion Taking magnetic resonance images of the male and female genitals during coitus is feasible and contributes to understanding of anatomy. Contributed by Contributors. Leonardo and Dickinson clearly underestimated the size of the root of the penis.
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