The obturator nerve is the only nerve that exits the pelvis via the obturator foramen. This nerve innervates the adductor compartment of the thigh after dividing into anterior and posterior branches subsequent to leaving the pelvis. The anterior branch innervates the gracilis, pectineus, and adductor longus and brevis. The posterior branch innervates the obturator externus and adductor magnus. Obturator nerve injury would cause weakness and spasm of the adductor compartment muscles.
The obturator nerve is the only major nerve that exist the pelvis through the obturator foramen. This nerve supplies the muscles of the medial (adductor) compartment of the thigh and can be damaged during pelvic surgery, especially in procedures such as lymph node dissection.
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