Nerve to the Piriformis

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Nerve: Nerve to the Piriformis
Plan of sacral plexus and pudendal plexus. (Label "to piriformis" is at center left.)
Posterior Hip Muscles 1.PNG
The piriformis and nearby muscles
Latin Nervus musculi piriformis
Gray's p.957
Innervates piriformis muscle
From sacral plexus (S1–S2)

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


The nerve to piriformis originates in the sacral plexus. It arises from the ventral division of the second sacral nerve, or the ventral divisions of the first and second sacral nerves (S1 & S2), and enters the anterior surface of the piriformis muscle; this nerve may be double. Not to get confused by the inferior gluteal nerve which is also (S1 and S2).

See also[edit]

This article incorporates text from a public domain edition of Gray's Anatomy.