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November 1986

Dermatomal Somatosensory Evoked Potentials in Meralgia Paresthetica

Author Affiliations

Department of Neurology West Virginia University Medical Center Morgantown, WV 26506

Arch Neurol. 1986;43(11):1101-1102. doi:10.1001/archneur.1986.00520110005003

To the Editor.  —The diagnosis of meralgia paresthetica does not require sophisticated electrophysiologic testing. However, in this increasingly complex and complicated world, physicians occasionally find it necessary to produce "objective" data to support their diagnoses. We recently identified a simple technique that can be used to support the diagnosis of meralgia paresthetica.

Report of a Case.  —A 35-year-old physician noted a ten-year history of a numb, right anterolateral thigh. Pinprick sensation was decreased over the distribution ofLateral Thigh Medial Thigh ig *mA* 0.5 μV 10 ms Skin Stimulation Record Cz-Fz 512 Repetitions Somatosensory-evoked potentials (SSEP) in patient with right meralgia paresthetica. Note absent SSEP with stimulation of right lateral thigh. the right lateral femoral cutaneous nerve. Somatosensory-evoked potentials (SSEP) were obtained stimulating the skin over the medial and lateral thigh of each leg at 5 Hz, and recording from the scalp at Cz-Fz. The results are shown in

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