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Assoc. w/ CN:
Vagus n. (CN10)
Accessory n. (cranial root) (CN11)
Functional component
The dorsal nuc. of vagus is usually described as mixed nuc. representing the fused GVE and GVA columns.
According to the others, the GVA column is incorporated in the SVA column representing the nuc. of tractus solitarius.
Structure:
Motor nucleus of vagus is a long vertical column of cells extending throughout most of the length of medulla.
Location:
Its upper end lies deep to the vagal triangle in the floor of 4th vent.
When traced downwards in the closed part of medulla, it occupies a position in the lateral part of central grey matter, dorsal to the hypoglossal nuc.
Target:
CN10 ⇒ Thoracic and abdominal viscera
This nuc. is the main source of parasympathetic fibres of CN10.CN11 ⇒ Cardiac muscle (through myocardial branches of vagus)
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