Food intake after adrenaline and noradrenaline injections into the hypothalamic paraventricular nucleus in pigeons

HAGEMANN, L. F., COSTA, C. V., L. Z. R. ZENI, C. G. FREITAS, J. MARINO-NETO AND M. A. PASCHOALINI. Food intake after adrenaline and noradrenaline injections into the hypothalamic paraventricular nucleus in pigeons. PHYSIOL. BEHAV 64(5) 645–652, 1998.—The effects of local injections of adrenaline (Ad...

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Published in:Physiology & behavior 1998-07, Vol.64 (5), p.645-652
Main Authors: Hagemann, Luis F., Costa, Camila V., Zeni, Lucia Z.R., Freitas, Candido G., Marino-Neto, José., Paschoalini, Marta A.
Format: Article
Language:English
Subjects:
Adrenaline
Adrenergic alpha-Agonists - administration & dosage
Adrenergic alpha-Agonists - pharmacology
Adrenergic alpha-Antagonists - pharmacology
Adrenergic beta-Antagonists - pharmacology
Animals
Avian
Behavioral psychophysiology
Biological and medical sciences
Columbidae
Eating - drug effects
Epinephrine - administration & dosage
Epinephrine - pharmacology
Exploratory Behavior - drug effects
Food Intake
Fundamental and applied biological sciences. Psychology
Hypothalamus
Injections
Male
Neurotransmission and behavior
Noradrenaline
Norepinephrine - administration & dosage
Norepinephrine - pharmacology
Paraventricular Hypothalamic Nucleus - physiology
Phentolamine - pharmacology
Pigeon
Propranolol - pharmacology
Psychology. Psychoanalysis. Psychiatry
Psychology. Psychophysiology
Satiety Response - physiology
Sleep - drug effects
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Summary:HAGEMANN, L. F., COSTA, C. V., L. Z. R. ZENI, C. G. FREITAS, J. MARINO-NETO AND M. A. PASCHOALINI. Food intake after adrenaline and noradrenaline injections into the hypothalamic paraventricular nucleus in pigeons. PHYSIOL. BEHAV 64(5) 645–652, 1998.—The effects of local injections of adrenaline (Adr, 6 nmol) or noradrenaline (Nor, 16 nmol) into the paraventricular nucleus (PVN) and into other anterior hypothalamic districts on feeding behavior were examined in satiated pigeons bearing a chronically implanted cannula. When infused into the PVN, both Adr and Nor reliably elicited feeding responses during the first hour after the injection. Feeding responses to Adr injections were significantly higher than those evoked by Nor. Other behavioral measurements (sleep, exploratory, and preening) were not affected by these treatments. Local pretreatment with phentolamine (20 nmol) but not with propranolol (20 nmol) abolished the feeding response induced by both Adr and Nor into the PVN. Lateral hypothalamic sites were also shown to respond to catecholamine injections with an increase in feeding, followed also by an increased sleep-like behavior duration. Together with other evidence, the present results indicate that adrenergically mediated circuits into the avian PVN play an important role in the mechanisms of food intake control, equivalent to that observed in mammalian species.
ISSN:0031-9384
1873-507X
DOI:10.1016/S0031-9384(98)00121-8