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Distal lesion of the lateral femoral cutaneous nerve
Author(s) -
Kushnir Mark,
Klein Colin,
Kimiagar Yitzhak,
Pollak Lea,
Rabey Jose M.
Publication year - 2008
Publication title -
muscle and nerve
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.025
H-Index - 145
eISSN - 1097-4598
pISSN - 0148-639X
DOI - 10.1002/mus.20876
Subject(s) - medicine , anterior superior iliac spine , cutaneous nerve , lesion , femoral nerve , thigh , anatomy , somatosensory evoked potential , magnetic resonance neurography , median nerve , sensory nerve , somatosensory system , electromyography , nerve conduction velocity , sensory system , surgery , radiology , magnetic resonance imaging , anesthesia , neuroscience , psychology , physical medicine and rehabilitation , psychiatry
We report three patients with a typical clinical picture of unilateral meralgia paresthetica in whom routine nerve conduction studies were normal. However, cortical somatosensory evoked potentials were absent after lateral femoral cutaneous nerve (LFCN) stimulation on the affected side. After stimulation of the LFCN in the anterosuperior iliac spine (ASIS) region and recording the responses distal to conventional sites (20 cm from the ASIS), sensory nerve action potentials (SNAPs) were absent in the symptomatic leg, but present in the normal leg. We suggest that thigh paresthesias may be caused by a distal LFCN lesion. Eliciting this requires recording SNAPs distal to conventional sites. Muscle Nerve, 2007