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Related Experiment Videos

Corpus cavernosum electromyogram: spontaneous and evoked electrical activities

D Yarnitsky1, E Sprecher, Y Barilan

  • 1Department of Neurology, Rambam Medical Center, Haifa, Israel.

The Journal of Urology
|March 1, 1995
PubMed
Summary

Corpus cavernosum electromyography may reflect general sympathetic nervous system activity, not just unique penile responses. Electrical recordings from the corpora and limbs show distinct spontaneous and stimulated sympathetic responses.

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Area of Science:

  • Neuroscience
  • Urology
  • Physiology

Background:

  • Electromyography of the corpus cavernosum is used to assess penile smooth muscle activity.
  • Previous studies suggest sympathetic skin responses from limbs and the penis share waveform similarities with corpus cavernosum recordings.

Purpose of the Study:

  • To differentiate between systemic sympathetic responses and unique smooth muscle activity in the corpus cavernosum.
  • To investigate the origin of electrical activity recorded from the corpora cavernosa.

Main Methods:

  • Simultaneous recording of electrical activity from the corpora cavernosa and limb surfaces in 10 healthy subjects.
  • Analysis of spontaneous electrical activity and responses to sympathetic activating maneuvers.

Main Results:

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  • Spontaneous electrical activity was exclusively observed in the corpora cavernosa.
  • Electrical activity in response to sympathetic stimulation occurred simultaneously in both the corpora cavernosa and limb recordings (Fisher's exact test, p < 0.001).

Conclusions:

  • Two distinct types of electrical activity can be recorded from the corpus cavernosum.
  • Spontaneous activity likely represents specific smooth muscle function, while response activity is part of the systemic sympathetic response.