Convergence of excitatory inputs from the chorda tympani, glossopharyngeal, and vagus nerves onto inferior salivatory nucleus neurons in the cat.
Inferior salivatory nucleus (ISN) neurons were identified by their antidromic spike responses to tympanic nerve stimulation, and their responses to stimulation of the ipsilateral chorda tympani, glossopharyngeal, and vagus nerves were investigated in urethane-chloralose-anesthetized cats. Of the 53 ISN neurons identified, stimulation of at least one of these nerves evoked spike responses in 35 (66%), and 25 (47%) were excited by inputs from more than two stimulated nerves. The mean latencies of the reflex responses evoked by stimulation of the chorda tympani, glossopharyngeal, and vagus nerves were 10.4, 13.7, and 18.9 ms, respectively.
Ishizuka
K
K
Department of Oral Physiology, Nippon Dental University, School of Dentistry, Niigata, Japan.
Murakami
T
T
D000200:Action Potentials; D000818:Animals; D002415:Cats / Q000502:physiology*; D004558:Electric Stimulation; D005154:Facial Nerve / Q000502:physiology*; D005930:Glossopharyngeal Nerve / Q000502:physiology*; D009474:Neurons / Q000502:physiology; D010306:Parotid Gland / Q000294:innervation* / Q000378:metabolism; D011930:Reaction Time; D012472:Salivation / Q000502:physiology*; D014630:Vagus Nerve / Q000502:physiology*