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Spinal accessory nucleus

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Brain: Spinal accessory nucleus
Gray696
The cranial nerve nuclei schematically represented; dorsal view. Motor nuclei in red; sensory in blue. (Spinal accessory nucleus is at "XI".)
[[Image:|250px|center|]]
Latin nervus spinalis nervi accessorii
Gray's subject #
Part of
Components
Artery
Vein
BrainInfo/UW ancil-999
MeSH [1]

The spinal accessory nucleus lies within the cervical spinal cord (C1-C5) in the ventral horn. The nucleus ambiguus is classically said to provide the "cranial component" of the accessory nerve. However, the very existence of this cranial component has been recently questioned and seen as contributing exclusively to the vagus nerve.

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