posterior cutaneous nerve of thigh
Definition: arises as a branch of the sacral plexus, conveying fibers from the ventral rami of first three sacral nerves; supplies the skin of the posterior surface of the thigh and of the popliteal region (S1 and S2 component); it gives off a perineal branch (S3 component) that passes to the lateral aspect of the scrotum or labia majora.
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