Sacral spinal nerve 1

The sacral spinal nerve 1 (S1) is a spinal nerve of the sacral segment.^[1]

Sacral spinal nerve
The plan of the lumbosacral plexus
Details
Identifiers
Latin	nervi spinalis
FMA	6423
Anatomical terminology [edit on Wikidata]

It originates from the spinal column from below the 1st body of the sacrum.

Sacrum, showing bodies in center.

Muscles

S1 supplies many muscles, either directly or through nerves originating from S1. They are not innervated with S1 as single origin, but partly by S1 and partly by other spinal nerves. The muscles are:

• gluteus maximus muscle
• gluteus medius muscle
• gluteus minimus muscle
• tensor fasciae latae
• piriformis
• obturator internus muscle
• inferior gemellus
• superior gemellus
• quadratus femoris
• semitendinosus
• gastrocnemius
• flexor hallucis longus
• abductor digiti minimi
• quadratus plantae

Additional images

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  Sacral spinal nerve 1
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  Sacral spinal nerve 1
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  Sacral spinal nerve 1