Gustatory and Thermal Responses in the Glossopharyngeal Nerve of the Rabbit and Cat

Yamada, Keiko

doi:10.2170/jjphysiol.17.94

Cited by 21 publications

(18 citation statements)

References 5 publications

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“…3; all responses in each animal were normalized to the 4 M-NaCl response, since this stimulus routinely evoked the largest nerve discharge. This latter finding, together with the small responses to sucrose, agree with other studies in the cat (Cohen, Hagiwara &r Zotterman, 1955;Pfaffmann, 1955;Yamada, 1967 (Daly & Scott, 1962). In contrast, stimulation of carotid sinus baroreceptors nearly always elicits a decrease in mean arterial blood pressure (Heymans & Bouckaert, 1930;Schmidt, 1932).…”

Section: Fidone In Preparation)supporting

confidence: 90%

“…There is a clear increase in tidal volume and respiratory frequency when substances known to excite circumvallate taste buds in the cat (Cohen et al 1955;Pfaffmann, 60 1955;Yamada, 1967;Oakley, 1975) are applied to the lingual epithelium of cross-anastomosed animals. The nerve response profiles with different gustatory stimuli (Fig.…”

Section: The Source Of Taste Bud Innervationmentioning

confidence: 99%

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Gustatory trophic action of arterial chemosensory neurones in the cat.

Dinger¹,

Fidone²,

Stensaas³

1984

The Journal of Physiology

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SUMMARY1. The proximal stump of the carotid sinus nerve (c.s.n.) branch ofthe IXth cranial nerve was surgically cross-anastomosed to the distal stump of the lingual nerve (l.n.) branch of the same cranial nerve to test the ability of regenerating c.s.n. axons to reinnervate and induce taste buds on cat circumvallate papillae. The l.n. branch of the IXth nerve, which normally innervates ciicumvallate papillae, was directed away from the tongue by suturing it to the distal stump of the c.s.n. Animals with normal and re-anastomosed (cut, then resutured) l.n. served as control preparations.2. 2-19 months following cross-anastomosis, circumvallate papillae contained 59-8 ± 9-1 % (mean+ s.E. of mean) of the normal incidence of taste buds, indicating that axons possessing specific gustatory trophic properties had reinnervated the epithelium. Further experimentation was concerned with confirming the identity of the putative foreign axons which reinnervated the taste buds.3. Radiolabelled axoplasmic transport and autoradiography showed that 89 + 4-4 % of the taste buds in cross-anastomosed, and 97 + 2-1 % in normal preparations were innervated by axons from the principal sensory ganglion (petrosal) of the IXth nerve (P > 005). 4. Whole-nerve recordings in cross-anastomosed preparations demonstrated gustatory activity in the transposed c.s.n., which was similar to responses present in normal and re-anastomosed l.n. preparations. The largest response was evoked by 4 M-NaCl, followed by 1 M-NH4Cl and 002 M-quinine HC1. Sucrose (05 M) elicited insignificant nerve activity.5. In normal animals, gustatory or mechanical stimulation did not alter cardiopulmonary function, but in bilaterally cross-anastomosed preparations, gustatory stimuli produced respiratory excitation while mechanical stimulation resulted in reductions in blood pressure and respiratory inhibition. These data suggest that following cross-anastomosis, arterial chemosensory axons innervate taste buds and barosensory axons innervate tongue mechanoreceptors (which normally evoke cardiopulmonary reflexes from the carotid body and carotid sinus, respectively).6. We conclude that arterial chemosensory neurones share with gustatory chemosensory neurones a trophic function essential for the development and maintenance of taste buds.

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Section: Fidone In Preparation)supporting

confidence: 90%

Section: The Source Of Taste Bud Innervationmentioning

confidence: 99%

Gustatory trophic action of arterial chemosensory neurones in the cat.

Dinger¹,

Fidone²,

Stensaas³

1984

The Journal of Physiology

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“…Such papillae also occur in a few other cats of the genus Felis (Bradley, 1971 ). Foliate papillae have been reported in the domestic cat by Yamada (1967). However, his published photomicrograph of the "Foliate papilla of a cat" bears little resemblance to typical foliate papillae, for example, as seen in the rabbit (Yamada, 1967, Figures lOb and IOd).…”

Section: Functional Anatomy Oj the Tongue And Mouth Oj Mammalsmentioning

confidence: 95%

“…Many taste buds are present in the foliate papillae (see Sonntag, 1925;Yamada, 1967;Bradley, 1971). An average of 36 taste buds per foliate fold occurs in the laboratory albino rat (Oakley, 1974), while in humans, 50~lOO taste buds per foliate papilla typically are present (Moncrieff, 1967).…”

Section: Functional Anatomy Oj the Tongue And Mouth Oj Mammalsmentioning

confidence: 99%

“…In rabbits, a combined foliate-and circumvallate-papillae multiunit electrophysiological response from the glossopharyngeal nerve was obtained by Yamada (1967) to 500 mM NaCl, KCI, and sucrose; 20 mM quinine hydrochloride; and 5 mM HC!. These responses were thought to be primarily of foliate-papillae origin because they were observed when the stimulus solutions flowed over the foliate papillae and the circumvallate papillae but did not occur when stimulus flow was restricted to the circumvallate papillae.…”

Section: Functional Anatomy Oj the Tongue And Mouth Oj Mammalsmentioning

confidence: 99%

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Functional Anatomy of the Tongue and Mouth of Mammals

Halpern

1977

Drinking Behavior

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Distribution and synaptology of glossopharyngeal afferent nerve terminals in the nucleus of the solitary tract of the hamster

Brining

Smith

1996

J. Comp. Neurol.

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The distribution and synaptology of the afferent fibers of the glossopharyngeal nerve (IXN) in the hamster were studied by using horseradish peroxidase (HRP) histochemistry visualized with light and electron microscopy. Crystals of HRP were applied to the trunk of IXN in the vicinity of the petrosal ganglion. The densest IXN afferent label was distributed within the nucleus of the solitary tract (nst), just caudal to but overlapping with the area of termination of the facial nerve. Labeled IXN fibers extended rostrally to the principal trigeminal nucleus and caudally to the cervical spinal cord. There was significant labeling within the spinal trigeminal complex; the area postrema and the medullary reticular formation contained some labeled fibers. Ultrastructurally, the synaptic arrangements of anterogradely labeled IXN fibers were examined in the nst. Quantitative measures were taken of the area, maximum diameter, perimeter, and vesicles of labeled endings and the length of their synaptic junctions with dendritic processes. These endings were compared to comparable endings in control material and to published descriptions of VIIth nerve afferent terminals in the hamster nst. The synaptic relations of IXN afferent endings were predominantly with dendritic spines and shafts. The majority (86.6%) of IXN afferent endings were with dendritic processes that were not in apparent contact with other, unlabeled processes. Only 13.4% of IXN synaptic relationships were with dendritic processes that were also contacted by unlabeled vesicle-containing processes. This is in contrast to 31.2% of facial nerve afferent endings in the nst which make synaptic contact with such processes. There were more direct synaptic contacts between facial endings and unlabeled vesicle-containing processes (26.1%) than between IXN endings and unlabeled vesicle-containing processes (1.3%). Thus, unlike the glomerular-like endings of the gustatory fibers of the VIIth nerve, less complex relations appeared to characterize IXN synapses in the nst. These differences were related to the differential physiology of gustatory fibers in the VIIth nerve and IXN.

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Gustatory and Thermal Responses in the Glossopharyngeal Nerve of the Rabbit and Cat

Cited by 21 publications

References 5 publications

Gustatory trophic action of arterial chemosensory neurones in the cat.

Gustatory trophic action of arterial chemosensory neurones in the cat.

Functional Anatomy of the Tongue and Mouth of Mammals

Distribution and synaptology of glossopharyngeal afferent nerve terminals in the nucleus of the solitary tract of the hamster

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