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The effects of sodium deprivation for 10 d, a period sufficient to induce sodium appetite, on gustatory nerve discharges in rats were determined. Chorda tympani responses to concentration series of sodium chloride, sucrose, hydrochloric acid, and quinine hydrochloride were recorded and analyzed without the experimenter knowing the animal's deprivation condition. After deprivation, both whole nerve and single nerve fiber responses to sodium chloride were smaller; NaCl-best fibers, those more responsive to sodium chloride than to sucrose, hydrochloric acid, or quinine, were most affected. Thresholds had not changed; however, slopes of the stimulus-response functions for sodium chloride were lowered. Comparable changes in responses to the other stimuli did not occur. These results were discussed with respect to a possible relationship between changes in sodium chloride responsivity and changes in sodium intake, differences between methods of inducing sodium appetite, coding of taste quality and intensity, and mechanisms which might effect the responsivity change.
R J Contreras, and
M Frank
February 2008,
Neuroscience letters,
R J Contreras, and
M Frank
January 1987,
Comparative biochemistry and physiology. A, Comparative physiology,
R J Contreras, and
M Frank
August 1985,
Behavioral neuroscience,
R J Contreras, and
M Frank
November 2007,
Physiology & behavior,
R J Contreras, and
M Frank
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R J Contreras, and
M Frank
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R J Contreras, and
M Frank
January 1980,
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R J Contreras, and
M Frank
September 1975,
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R J Contreras, and
M Frank
February 1978,
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