title: Topography of the sciatic nerve's fibres in regard of clinical use.
abstract: 72 sciatic nerves were investigated from the level of the sciatic tuberosity to the branching off of the nerves for the posterior thigh muscles. The area of the cross section has a mean value of about 72 mm2. Almost 1/3 of it belongs to the peroneal component. The bundles for the hamstring muscles occupy about 13% of the tibial component; mostly they are situated slightly anterior to the medial margin of the nerve. The bundles for the short head of the biceps muscle of the femur occupy about 11% of the peroneal component; they are situated slightly anterior to the lateral margin of the nerve. The bundles for the hamstring muscles exchange fibres with other fascicles in more than 60% of the specimens, whereas the bundles for the short biceps head do so in less than 25%.
mesh_terms: D006801:Humans; D009132:Muscles / Q000294:innervation; D009412:Nerve Fibers / Q000033:anatomy & histology*; D012584:Sciatic Nerve / Q000033:anatomy & histology*; D013848:Thigh / Q000294:innervation*