Sacral spinal nerve 2
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The sacral spinal nerve 2 (S2) is a spinal nerve of the sacral segment.[1].
It originates from the spinal column from below the 2nd body of the sacrum
Muscles
S2 supplies many muscles, either directly or through nerves originating from S2. They are not innervated with S2 as single origin, but partly by S2 and partly by other spinal nerves. The muscles are:
- sphincter urethrae membranaceae
- gluteus maximus muscle
- piriformis
- obturator internus muscle
- superior gemellus
- semitendinosus
- gastrocnemius
- flexor hallucis longus
- abductor digiti minimi
- quadratus plantae
References
Nerves: spinal nerves | |
|---|---|
| Cervical (8) | C1, C2, C3, C4, C5, C6, C7, C8
anterior (Cervical plexus, Brachial plexus) - posterior (Posterior branches of cervical nerves, Suboccipital - C1, Greater occipital - C2, Third occipital - C3) |
| Thoracic (12) | T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12
anterior (Intercostal, Intercostobrachial - T2, Thoraco-abdominal nerves - T7-T11, Subcostal - T12) - posterior (Posterior branches of thoracic nerves) |
| Lumbar (5) | L1, L2, L3, L4, L5
anterior (Lumbar plexus, Lumbosacral trunk) - posterior (Posterior branches of the lumbar nerves, Superior cluneal L1-L3) |
| Sacral (5) | S1, S2, S3, S4, S5
anterior (Sacral plexus) - posterior (Posterior branches of sacral nerves, Medial cluneal nerves) |
| Coccygeal (1) | anterior (Coccygeal plexus) - posterior (Posterior branch of coccygeal nerve) |
Acknowledgement and Attribution Regarding Sources of Content
Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .
