POSTERIOR CUTANEOUS NERVE OF THIGH

  

ORIGIN: Lumbosacral plexus dorsal branches of ventral rami S1,2 and ventral branches from S2,3.

COURSE/DISTRIBUTION: Takes its origin from the lumboascral plexus and leaves the pelvic cavity by passing through the greater sciatic foramen below the piriformis, accompanying the sciatic nerve (at its medial aspect). It descends to the back of thigh superficial to the biceps femoris and as it reaches the popliteal fossa, it pierces the deep fascia and then accompanies the short saphenous vein to the middle of the back of the leg. It supplies the skin of gluteal region, back of thigh and leg.

BRANCHES: Cutaneous branches only.

ROOT VALUE: S1,2,3.

 

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