Piriformis nerve | |
---|---|
![]() Diagram of
sacral plexus and
pudendal plexus. (Label "to piriformis" is at center left.) | |
The piriformis and nearby muscles | |
Details | |
From | Sacral plexus (S1–S2) |
Innervates | Piriformis muscle |
Identifiers | |
Latin | nervus musculi piriformis |
TA98 | A14.2.07.029 |
TA2 | 6545 |
FMA | 16509 |
Anatomical terms of neuroanatomy |
The piriformis nerve, also known as the nerve to piriformis, is the peripheral nerve that provides motor innervation to the piriformis muscle.
The nerve to piriformis is a branch of the sacral plexus. [1] [2] It (typically [3]) arises from the posterior divisions [4]/branches [3] of anterior rami of S1 and S2. [1] [2] [3] [5]
It enters the anterior surface of the piriformis muscle. [3] [6]
Origin
It may sometimes arise from the anterior ramus of S2 only. [3]
Number
It may be doubled. An additional branch may arise from the superior gluteal nerve. [3]
The piriformis nerve innervates the piriformis muscle. [1]
This article incorporates text in the
public domain from
page 957 of the 20th edition of
Gray's Anatomy (1918)
홍재기
Piriformis nerve | |
---|---|
![]() Diagram of
sacral plexus and
pudendal plexus. (Label "to piriformis" is at center left.) | |
The piriformis and nearby muscles | |
Details | |
From | Sacral plexus (S1–S2) |
Innervates | Piriformis muscle |
Identifiers | |
Latin | nervus musculi piriformis |
TA98 | A14.2.07.029 |
TA2 | 6545 |
FMA | 16509 |
Anatomical terms of neuroanatomy |
The piriformis nerve, also known as the nerve to piriformis, is the peripheral nerve that provides motor innervation to the piriformis muscle.
The nerve to piriformis is a branch of the sacral plexus. [1] [2] It (typically [3]) arises from the posterior divisions [4]/branches [3] of anterior rami of S1 and S2. [1] [2] [3] [5]
It enters the anterior surface of the piriformis muscle. [3] [6]
Origin
It may sometimes arise from the anterior ramus of S2 only. [3]
Number
It may be doubled. An additional branch may arise from the superior gluteal nerve. [3]
The piriformis nerve innervates the piriformis muscle. [1]
This article incorporates text in the
public domain from
page 957 of the 20th edition of
Gray's Anatomy (1918)
홍재기