The spinal nucleus of the accessory nerve in human embryos at stage 13.
In 8 serially sectioned human embryos the spinal accessory nucleus was traced. It was found that the spinal nucleus of the accessory nerve extends as continuation of the medial part of the nucleus ambiguus in the cervical segments of the spinal cord to the 5th segment. The nucleus forms small group of cells lying dorsolaterally in the ventral horns. Fibers from the nucleus leave the spinal cord close to the sulcus limitans.
Skórzewska
A
A
Department of Anatomy, University Medical School, Poznań.
Bruska
M
M
Woźniak
W
W
D000055:Accessory Nerve / Q000196:embryology*; D005865:Gestational Age; D006801:Humans; D009432:Neural Crest / Q000196:embryology