Sacral spinal nerve 4
The sacral spinal nerve 4 (S4) is a spinal nerve of the sacral segment.
|Sacral spinal nerve|
The plan of the lumbosacral plexus
It originates from the spinal column from below the 4th body of the sacrum
S4 supplies many muscles, either directly or through nerves originating from S4. They are not innervated with S4 as single origin, but partly by S4 and partly by other spinal nerves. The muscles are:
- Sacral spinal nerve 4
- American Medical Association Nervous System -- Groups of Nerves
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