title: L4-L5-S1 human dermatomes: a clinical, electromyographical, imaging and surgical findings.
abstract: There is substantial controversy in literature about human dermatomes. We studied L4, L5, and S1 inferior limb dermatomes by comparing clinical signs and symptoms with conduction studies, electromyographical data, neurosurgical findings, and imaging data from computerized tomography (CT) or magnetic resonance imaging (MRI). After analyzing 60 patients, we concluded that L4 is probably located in the medial aspect of the leg, L5 in the lateral aspect of the leg and foot dorsus, and S1 in the posterior aspect of the backside, tight, leg and plantar foot skin. This is the first time that these human dermatomes have been evaluated by combined analysis of clinical, electromyographical, neurosurgical, and imaging data.
authors: Department of Neurology, Psycology and Psychiatry, Botucatu Medical School, São Paulo State University, Botucatu, SP, Brazil.
authors: Antonio Tadeu de Souza
authors: AT
authors: Faleiros
authors: Luiz Antonio de Lima
authors: LA
authors: Resende
authors: Marco Antonio
authors: MA
authors: Zanini
authors: Heloisa Amélia de Lima
authors: HA
authors: Castro
authors: Roberto Colichio
authors: RC
authors: Gabarra
mesh_terms: D002081:Buttocks / Q000294:innervation; D004576:Electromyography; D006801:Humans; D007866:Leg / Q000294:innervation*; D008279:Magnetic Resonance Imaging; D010525:Peripheral Nerves / Q000503:physiopathology*; D011843:Radiculopathy / Q000503:physiopathology / Q000601:surgery; D014057:Tomography, X-Ray Computed