Sacral spinal nerve 3

The sacral spinal nerve 3 (S3) is a spinal nerve of the sacral segment.^[1]

Sacral spinal nerve
The plan of the lumbosacral plexus
Details
Identifiers
Latin	nervi spinalis
FMA	6425
Anatomical terminology [edit on Wikidata]

It originates from the spinal column from below the 3rd body of the sacrum.

Sacrum, showing bodies in center.

Muscles

S3 supplies many muscles, either directly or through nerves originating from S3. They are not innervated with S3 as single origin, but partly by S3 and partly by other spinal nerves. The muscles are:

• iliococcygeus
• puborectalis
• coccygeus
• sphincter urethrae membranaceae
• superior gemellus

Additional images

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  Sacral spinal nerve 3