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May 1, 1937

Current Comment

JAMA. 1937;108(18):1545-1546. doi:10.1001/jama.1937.02780180069018

SCIATIC PAIN AND ITS RELIEF  Freiberg1 has recently reported several important observations on the anatomic relations of the sciatic nerve. The piriformis muscle, he states, is constantly found to have a part of its origin from the capsule of the sacro-iliac joint, and it is the only muscle which bridges that joint. This muscle is in extremely close relationship with the sciatic nerve. The nerve, in fact, is found to penetrate the substance of the muscle in 10 per cent or more of cadavers. Experiments on cadavers show that by the Lasègue maneuver the piriformis is put on the stretch after only a few degrees of straight leg raising through the medium of the biceps femoris muscle and its connection with the great sciatic ligament, from which the piriformis derives a part of its origin. The piriformis may therefore be expected to react by spasm as the result of

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