Facial, Vagal and Glossopharyngeal Nerves in the Cat

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Abstract
The observations contained in this report stem from a study of pain afferent nerve fibers from craniofacial and cervical regions, particularly in relation to referred-pain syndromes and atypical neuralgias. Early studies by Cajal and van Gehuchten, among others, provided much of the basic information on the organization of the visceral afferent fibers of the facial (VII), glossopharyngeal (IX), and vagal (X) nerves. Subsequent investigators*have traced these afferent fibers in various species, including man. Despite these detailed and careful reports, numerous aspects of the connections of the afferent fibers remain undetermined. In particular, the site of termination of fibers mediating pain has been inferred mainly from surgical and clinical studies, but never established anatomically; tactile connections have been suggested on rather vague grounds, and deep sensibility connections have remained entirely unknown. Material and Methods Twenty-three adult cats weighing between 4 and 9 lb. each were used; the results in 17

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