FIGURE 4.4. (A) Summated whole-nerve recordings of ipsilateral glossopharyngeal nerve responses to 0.

FIGURE 4.4

(A) Summated whole-nerve recordings of ipsilateral glossopharyngeal nerve responses to 0.5 M NH4Cl, citric acid, KCl, and NaCl applied to the circumvallate papilla in a rat. During the recording of the taste response, the contralateral glossopharyngeal nerve was briefly electrically stimulated (E.S.) to evoke salivary secretion from von Ebner’s glands that drain into the clefts of the circumvallate papilla. The steady-state taste response is reduced by approximately 50% for all stimuli. Water is flowed over the tongue (arrowhead) to rinse the taste stimulus away. (B) Similar experiment as in A, after atropine had been systemically administered to the animal to block salivary secretion. The electrical stimulation has no effect on the taste responses. Calibration bar = 30 sec. (From Gurkan, S. and Bradley, R. M., Chem. Senses, 13, 655, 1988, by permission of Oxford University Press.)

From: Chapter 4, Reflex Connections

Cover of The Role of the Nucleus of the Solitary Tract in Gustatory Processing
The Role of the Nucleus of the Solitary Tract in Gustatory Processing.
Bradley RM, editor.
Boca Raton (FL): CRC Press/Taylor & Francis; 2007.
Copyright © 2007, Taylor & Francis Group, LLC.

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