The purpose of this study was to standardize an easy and convenient method of studying the deep peroneal sensory nerve for clinical purpose of differential diagnosis of ankle and foot pain. We studied the deep peroneal sensory nerve in 40 neurologically healthy adult subjects. The latency to onset of sensory action potential was 2.95±0.23 msec. The latency to peak of sensory action potential was 3.66±0.28 msec. The conduction velocity measured by onset latency was 40.89±3.36 m/sec. The amplitude was 5.75±1.89uV.

We also presented a case of partial peripheral neuropathy of left common peroneal nerve which revealed no evoked potential in deep peroneal sensory nerve.

We concluded that the electrophysiologic evaluation of the deep peroneal sensory nerve may be helpful in the diagnosis of deep peroneal neuropathies in the anterior tarsal tunnel or local deep peroneal nerve injury and also helpful in early detection of peripheral neuropathies.