Piriformis nerve

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Piriformis nerve
Diagram of sacral plexus and pudendal plexus. (Label "to piriformis" is at center left.)
Posterior Hip Muscles 1.PNG
The piriformis and nearby muscles
From sacral plexus (S1–S2)
Innervates piriformis muscle
Latin Nervus musculi piriformis
TA A14.2.07.029
FMA 16509
Anatomical terms of neuroanatomy

The nerve to piriformis is the peripheral nerve that innervates the piriformis muscle.


The nerve to piriformis originates in the sacral plexus. It arises from the posterior division of the ventral rami of the first and second sacral nerves, and enters the anterior surface of the piriformis muscle. This nerve may be double. This nerve is not to be confused with the inferior gluteal nerve, which also arises from posterior divisions of the first and second sacral ventral rami (S1, S2).

See also[edit]


This article incorporates text in the public domain from page 957 of the 20th edition of Gray's Anatomy (1918)