NDLI: Ontogenetic Development of Dopaminergic Regulation of Grooming Behavior in Rats

Content Provider	Springer Nature Link
Author	Lepekhina, L. M. Tsitsurina, E. A.
Copyright Year	2009
Abstract	The effect of the developing nucleus accumbens and ventrolateral striatum on grooming behavior in rat pups (1st month of life) and adult rats (2-12 months of life) was studied during activation of D1 and D2 dopamine receptors with apomorphine. Over the 1st week of life, apomorphine treatment was followed by hypersensitivity of D1 receptors in the nucleus accumbens. It was manifested in the early appearance of scratching and washing movements during ontogeny. The effect of activation was reduced after neonatal gangliosympathectomy. D2 receptors in the nucleus accumbens are identifi ed on day 22 of life. D2 receptors in the ventrolateral striatum become functionally active during this period. Under these conditions, apomorphine increased signifi cantly the duration of licking and biting movements. The number of D2 receptors in the ventrolateral striatum increases sharply during sexual maturity (2nd month of life). These changes are accompanied by an increase in the duration of oral stereotyped behavior. The duration of grooming movements was signifi cantly reduced by the end of stereotyped behavior. The effect of apomorphine was most pronounced in 9-month-old animals. We conclude that the immature ventrolateral striatum has a reciprocal stimulatory effect on licking and biting movements during ontogeny. By contrast, the mature striatum produces a subordinate reciprocal inhibitory infl uence on various types of grooming movements.
Starting Page	363
Ending Page	365
Page Count	3
File Format	PDF
ISSN	00074888
Journal	Bulletin of Experimental Biology and Medicine
Volume Number	148
Issue Number	3
e-ISSN	15738221
Language	English
Publisher	Springer US
Publisher Date	2010-02-02
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	grooming behavior apomorphine-dopaminergic regulation neonatal gangliosympathectomy ontogeny rat Laboratory Medicine Pathology Cell Biology Internal Medicine Biomedicine general
Content Type	Text
Resource Type	Article
Subject	Medicine Biochemistry, Genetics and Molecular Biology

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