Cambridge Questions

The sacral plexus

Forms from posterior rami

Forms from the L4-S4 nerve roots

Forms superior to piriformis

Forms the superior gluteal nerve which supplies gluteus maximus

Gives a branch to supply biceps femoris

The sacral plexus forms posterior to piriformis when the lumbrosacral trunk (L4,5) and the anterior ramus of S1 join the S2,3,4 nerve roots. It supplies both structures in the perineum and the lower limb

Its branches include:

Pudendal nerve
Nerve to obturator internus
Posterior femoral cutaneous nerve
Sciatic nerve
Inferior gluteal nerve
Nerve to quadratus femoris

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anatomy and physiology mcqs

Question #479