Proprioceptive components of cranial nerves. The spinal accessory nerve

✍ Scribed by Kendall B. Corbin; Frank Harrison

• Publisher: John Wiley and Sons
• Year: 1938
• Tongue: English
• Weight: 684 KB
• Volume: 69
• Category: Article
• ISSN: 0021-9967
• DOI: 10.1002/cne.900690209

✦ Synopsis

The spinal accessory nerve in mammals is usually considered to be predominantly eff erent in character. Recently, Straus and Howell ('36) reviewed the literature bearing on the phylogeny of this nerve arid its musculature and concluded that : "A41though originally a mixed nerve, with ganglion cells primarily associated with those of X, it exhibits a strong phylogenetic inclination to lose its sensory cells, by their migration onto the dorsal roots of adjacent cervical nerves. ' ' Interest in the origin of a possible sensory component in the spinal accessory nerve was renewed by the work of Windle ('31 a ) . He obtained chromatolysis in C1 dorsal root ganglion, after sectioning the spinal accessory nerve "just proximal to its entrance into the sternomastoid muscle" in the cat. Confirming the findings of earlier workers he reported the presence of intracranial and extracranial cell clusters along the acccssory nerve. T17indle, therefore, concluded that the spinal accessory in the monkey and cat coii- tained sensory fibers arising from C1 dorsal root ganglion as well as from ganglion cells in its own sheath. Later Windle and DeLozier ( '32) concluded from stimulation ex-' Aided by a grunt from the Rockefeller Foundation.