Facial electroneurography: results on normal humans.

Area of Science:

• Neurology
• Clinical Neurophysiology

Background:

• Facial paralysis diagnosis requires reliable electrophysiological tests.
• Electroneurography (ENoG) is a recently introduced clinical tool for evaluating facial nerve function.

Purpose of the Study:

• To assess Electroneurography (ENoG) reliability in normal subjects.
• To investigate inter-subject and intra-subject variability in ENoG measurements.
• To evaluate potential amplitude and latency changes during consecutive stimulation.

Main Methods:

• Studied 24 healthy individuals undergoing Electroneurography (ENoG).
• Measured right-left facial differences, test-retest variability.
• Analyzed compound action potentials (CAPs) after 25 consecutive stimuli.

Main Results:

• No significant inter-subject right-left facial differences were observed.
• Intra-subject amplitude variation averaged 25% between facial sides.
• Minimal test-retest variability for amplitude (3.15%) and latency (1.9%).
• No significant differences in amplitude or latency between the first and last CAPs.

Conclusions:

• Electroneurography (ENoG) demonstrates good test-retest reliability for amplitude and latency.
• ENoG is a potentially valuable tool for facial paralysis assessment.
• Further research should explore ENoG in patients with facial paralysis.