Quotation from: Manual of SurgeryWritten by: Alexander Miles and Alexis Thomson |
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#The Sciatic Nerve.#--When this nerve is compressed, as by sitting on a fence, there is tingling and powerlessness in the limb as a whole, known as "sleeping" of the limb, but these phenomena are evanescent. _Injuries to the great sciatic nerve_ are rare except in war. Partial division is more common than complete, and it is noteworthy that the fibres destined for the peroneal nerve are more often and more severely injured than those for the tibial (internal popliteal). After complete division, all the muscles of the leg are paralysed; if the section is in the upper part of the thigh, the hamstrings are also paralysed. The limb is at first quite powerless, but the patient usually recovers sufficiently to be able to walk with a little support, and although the hamstrings are paralysed the knee can be flexed by the sartorius and gracilis. The chief feature is drop-foot. There is also loss of sensation below the knee except along the course of the long saphenous nerve on the medial side of the leg and foot. Sensibility to deep touch is only lost over a comparatively small area on the dorsum of the foot.
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