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Greater sciatic notch

Other Terms: Incisura ischiadica major, Grande incisure ischiatique

Description

This is the large, deep notch on the posterior margin of the ischium, above the ischial spine and below the junction with the posterior inferior iliac spine. This notch provides passage to the piriformis muscle, the superior and inferior gluteal vessels and nerves, the sciatic and posterior femoral cutaneous nerves, the internal pudendal vessels and pudendal nerve, and the nerves to the obturator internus and quadratus femoris muscles on their course from the pelvis to the gluteal region.

Etymology

Sciatic is a contraction of the Latin term ischiadicus from the Greek ischion meaning hip joint. A notch refers to an indented region of bone, the Latin equivalent of the term being incisure.

Latin

Incisura ischiadica major

French

Grande incisure ischiatique

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