Meralgia paresthetica is an entrapment neuropathy of the lateral femoral cutaneous nerve, clinically characterized by burning, stinging and tingling sensation of the outer side of the thigh. We have studied SNAP (sensory nerve action potential) of 6 patients (three females, three males). The ages of these patients ranged from 16 to 65 years old (averaging 36.5 years). These patients had tenderness or Tinel sign at the Inguinal Ligament. We stimulated the nerve at the proximal and distal sides

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... the Inguinal Ligament and recorded the findings. These recordings were taken at points 10-15cm from the anterior superior iliac spine. On the affected proximal side, the amplitude of SNAP were lower than the unaffected side. In conduction velosity, there was no significant difference between the two stimulation points. Recording of SNAP (especially the difference of the amplitudes) were useful in the diagnosis of Meralgia Paresthetica.