The brain stem localization of vagal preganglionic neurones in the ferret, Mustela putorius furo.

Horseradish peroxidase-wheatgerm agglutinin was injected into the cervical vagus nerve of adult ferrets. Efferent fibres coursing in the vagus nerve were shown to originate in the dorsal vagal motor nucleus (DmnX), the nucleus ambiguus (nA), a region ventral to the nucleus ambiguus (VnA) and the reticular formation between DmnX and nA. The distribution of vagal preganglionic neurones in the ferret is compared with data already obtained in similar studies conducted in other mammals.