Central Gustatory Lesions: II. Effects on Sodium Appetite, Taste Aversion Learning, and Feeding Behaviors

Intake and taste reactivity tests were used to determine the effects of bilateral lesions of the gustatory portions of the nucleus of the solitary tract (NST), the parabrachial nucleus (PBN), and the ventral posteromedial nucleus of the thalamus (VPMpc) on several complex ingestive behaviors. In the...

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Bibliographic Details
Published in:Behavioral neuroscience 1991-12, Vol.105 (6), p.944-954
Main Authors: Flynn, Francis W, Grill, Harvey J, Schulkin, Jay, Norgren, Ralph
Format: Article
Language:English
Subjects:
Afferent Pathways - physiology
Anatomical correlates of behavior
Animal
Animal behavior
Animals
Appetite - physiology
Association Learning - physiology
Aversion Conditioning
Avoidance Learning - physiology
Behavioral psychophysiology
Biological and medical sciences
Brain - physiology
Brain Mapping
Conditioning, Classical - physiology
Cranial Nerves
Drinking - physiology
Facial Nerve - physiology
Feeding Behavior - physiology
Food Intake
Fundamental and applied biological sciences. Psychology
Glossopharyngeal Nerve - physiology
Male
Pons
Pons - physiology
Psychology. Psychoanalysis. Psychiatry
Psychology. Psychophysiology
Rats
Rats, Inbred Strains
Rodents
Sodium
Sodium, Dietary - administration & dosage
Synapses - physiology
Taste
Taste - physiology
Taste Perception
Taste Threshold - physiology
Thalamic Nuclei
Thalamic Nuclei - physiology
Vagus Nerve - physiology
Water-Electrolyte Balance - physiology
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Summary:Intake and taste reactivity tests were used to determine the effects of bilateral lesions of the gustatory portions of the nucleus of the solitary tract (NST), the parabrachial nucleus (PBN), and the ventral posteromedial nucleus of the thalamus (VPMpc) on several complex ingestive behaviors. In the 1st experiment, lesions of the PBN and the NST blocked, and VPMpc lesions impaired, the behavioral expression of salt appetite. In the 2nd experiment, alanine was paired with injections of LiCl. Control rats as well as rats with NST and VPMpc lesions acquired the taste aversion, but rats with PBN lesions did not. In the 3rd experiment, all animals increased their food intake after injections of 2 U/kg insulin and 250 mg/kg 2-deoxy- D -glucose, and their food intake was suppressed after nutritive stomach loads.
ISSN:0735-7044
1939-0084
DOI:10.1037/0735-7044.105.6.944