Sacral spinal nerve 4

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Sacral spinal nerve
Sobo 1909 715.png
The plan of the lumbosacral plexus
Latin Nervi spinalis
FMA 6426
Anatomical terminology

The sacral spinal nerve 4 (S4) is a spinal nerve of the sacral segment.[1]

It originates from the spinal column from below the 4th body of the sacrum

Sacrum, showing bodies in center.


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:

Additional Images[edit]


  1. ^ American Medical Association Nervous System -- Groups of Nerves