Effect of Diazepam and A β-Carboline on Open-Field and T-Maze Behaviors in 2-Day-Old Chicks
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- 作者：Marí ; n ; Raú ; l H. ; Martijena ; Irene D. ; Arce ; Augusto
- 关键词：Open-field ; T-Maze task ; Diazepam ; β ; -Carboline ; Chick behavior
- 刊名：Pharmacology Biochemistry and Behavior
- 出版年：1997
- 出版时间：December, 1997
- 年：1997
- 卷：58
- 期：4
- 页码：915-921
- 全文大小：688 K
文摘
MARd;N, R. H., I. D. MARTIJENA AND A. ARCE. Effect of diazepam and a β-carboline on open-field and T-maze behaviors in 2-day-old chicks. PHARMACOL BIOCHEM BEHAV 58(4) 915–921, 1997.—The effects of diazepam and the β-carboline FG 7142 in chicks were examined on several behavioral measures in open-field and T-maze tasks. In the open field, only the higher doses of diazepam affected behavior, suggesting a sedative-like effect, while FG 7142 influenced behavior as would a fear-inducing manipulation. After a low dose of either drug was injected, testing in a T-maze showed that diazepam improved and FG 7142 impaired the escape performance from the isolation chamber, without affecting the time spent in the T-corridor. In three groups of chicks selected on the basis of their first escape performance, only lower performance chicks were affected by an anxiolytic dose of diazepam. T-maze results suggest that: (a) T-maze is more sensitive than open-field test to behavior changes induced by anxiolytic doses of diazepam; (b) isolation chamber behavior could be an index of general emotionality in young chicks; (c) diazepam and FG 7142 do not modify the social motivation to escape the maze; (d) higher performance chicks present an escape behavior of a less anxious type than lower performance chicks. The results suggest that the GABAergic system is involved in the behavioral expression of fear and anxiety in young chicks.