Amygdaloid modulation of sodium chloride and water intake in the rat


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Abstract

Conducted 5 experiments with adult male albino rats. Unilateral application of acetylcholine to the amygdala in sodium-deprived ss increased nacl intake while decreasing it in thirsty and satiated ss. Water intake was not affected. Bilateral transection of stria terminalis (st) or ventral amygdalofugal (vaf) tract, decreased saline intake in sodium-deprived ss. In sated ss, damage to st did not affect sodium intake, while vaf-tract transection decreased it. Water intake increased in sated ss with st lesions. Acetylcholine in the amygdala of sodium-deprived ss with damage to either tract raised sodium intake to control levels. Transection of both pathways plus amygdaloid stimulation failed to increase saline intake. It is concluded that impulses from amygdala reaching hypothalamus through st and vaf modulate nacl intake. (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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