From sacral plexus (S1–S2) Dorlands
/Elsevier n_05/12566208 FMA 16509 | Innervates piriformis muscle TA A14.2.07.029 | |
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Latin Nervus musculi piriformis | ||
The nerve to piriformis is the peripheral nerve that innervates the piriformis muscle.
Course
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).
References
Piriformis nerve Wikipedia(Text) CC BY-SA