Annals of Indian Academy of Neurology
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Role of pain-Related evoked potential in the diagnosis of meralgia paresthetica

 Department of Neurological Sciences, Christian Medical College, Vellore, Tamil Nadu, India

Date of Submission11-May-2020
Date of Acceptance11-Jun-2020

Correspondence Address:
Appaswamy Thirumal Prabhakar,
Department of Neurological Sciences, Christian Medical College, Vellore - 632 004, Tamil Nadu
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/aian.AIAN_441_20



Introduction: Entrapment of the lateral femoral cutaneous nerve (LFCN) of thigh results in meralgia paresthetica (MP). Standard electrophysiological tests for MP are technically demanding and unreliable. We aimed to study the role of pain-related evoked potentials (PREP) in the diagnosis of MP. Methods: Patients with MP and normal volunteers were included. PREP was recorded by stimulating the skin over the lateral thigh 20 cm below the anterior-superior iliac spine and recording from the cortex at Cz. Results: A total of 28 subjects and 56 LFCNs were studied. 36 nerves had MP and 20 were normal. The mean PREP latency was 118 (8) ms among normal controls and 164 (10.8) ms in MP. The optimal cut-off point for the diagnosis of MP was 134 ms. Area under receiver operator characteristic curve was 0.97; sensitivity was 91.7% and specificity was 100%. Conclusion: PREP is reliable and easy to use electrophysiological test in establishing the diagnosis of MP.

Keywords: Diagnosis, evoked potential, lateral femoral cutaneous nerve of thigh, meralgia paresthetica, pain-related evoked potential

How to cite this URL:
Ahmed Shaikh AI, Das M, Roy A, Baby B, Dhar D, Abigayil J, Varghese VS, Mathew V, Aaron S, Sivadasan A, Premkumar P, Suresh T, Prabhakar AT. Role of pain-Related evoked potential in the diagnosis of meralgia paresthetica. Ann Indian Acad Neurol [Epub ahead of print] [cited 2021 May 12]. Available from:



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