Posterior femoral cutaneous nerve conduction

Area of Science:

• Neuroscience
• Peripheral Nervous System Anatomy
• Electrophysiology

Background:

• The posterior femoral cutaneous nerve is a sensory nerve originating from sacral segments.
• It innervates the posterior thigh and calf.
• Assessing this nerve's function is crucial for diagnosing certain neuropathies.

Purpose of the Study:

• To describe a novel electrophysiologic technique for evaluating the posterior femoral cutaneous nerve.
• To establish normative electrophysiologic values for this nerve.
• To explore the clinical utility of this technique in evaluating lower extremity conditions.

Main Methods:

• An electrophysiologic technique was developed to assess peripheral axons of the posterior femoral cutaneous nerve.
• Specific electrode placements for recording and stimulation were defined.
• The technique was applied to 40 healthy individuals (mean age 34 years).

Main Results:

• The mean peak latency of the nerve response was 2.8 msec (range: 2.3-3.4 msec).
• The mean amplitude of the response was 6.5 microV (range: 4.1-12.0 microV).
• These results provide normative data for the described electrophysiologic technique.

Conclusions:

• The described electrophysiologic technique is a viable method for assessing the posterior femoral cutaneous nerve.
• This technique can aid in the proximal evaluation of lower extremity peripheral neuropathies.
• It may also be useful for assessing the peripheral nervous system in individuals with lower extremity amputations.