Penile electrodiagnosis: penile peripheral innervation.

Area of Science:

• Urology
• Neuroscience
• Physiology

Background:

• Electrophysiologic tests are valuable for diagnosing sexual dysfunction.
• Limited understanding of penile innervation has hindered test interpretation.
• Peripheral somatic innervation of the penis requires further elucidation.

Purpose of the Study:

• To accurately assess the peripheral somatic innervation of the penis.
• To investigate penile innervation patterns in patients with impotence.
• To establish the role of the dorsal nerve of the penis in sexual function.

Main Methods:

• Electrophysiologic studies were conducted on 18 patients (3 psychogenic impotence, 15 organic impotence).
• Detailed assessment of penile innervation, specifically the glans penis.
• Nerve conduction velocity measurements of the dorsal nerve of the penis.

Main Results:

• The glans penis is primarily innervated by the dorsal nerve of the penis.
• Dual innervation (dorsal and perineal nerves) was observed in some patients at the ventral glans.
• The dorsal nerve of the penis plays a predominant role in glans innervation.

Conclusions:

• The dorsal nerve of the penis is critical for sexual arousal and erectile function.
• Measuring nerve conduction velocity of the dorsal nerve of the penis is justified for diagnosing sexual dysfunction.
• Understanding penile innervation enhances the diagnostic utility of electrophysiologic tests.