Obturator Nerve
Origins:
Anterior divisions of ventral rami of L2.3.,4
Course
Exits pelvis through obturator canal joined from below and behind by obturator vessels.
Divides into anterior and posterior branches:
Anterior one emerges above obturator internus
Posterior one pierces obturator externus
Adductor brevis separates the two branches.
Branches and distribution :
Branch
Distribution
Anterior
Gracilis Adductor longus Adductor brevis Pectineus Hip Joint Femoral artery Medial aspect of lower thigh and upper leg
Posterior
Adductor magnus Obturator externus Knee joint
Anterior divisions of ventral rami of L2.3.,4