AMPHETAMINE-INDUCED CHANGES IN BEHAVIOR AND CAUDATE EXTRACELLULAR ACETYLCHOLINE

被引:27
作者
FLORIN, SM [1 ]
KUCZENSKI, R [1 ]
SEGAL, DS [1 ]
机构
[1] UNIV CALIF SAN DIEGO, DEPT PSYCHIAT 0603, LA JOLLA, CA 92093 USA
关键词
ACETYLCHOLINE; DOPAMINE; AMPHETAMINE; MICRODIALYSIS; CAUDATE; STEREOTYPY;
D O I
10.1016/0006-8993(92)90343-8
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
In vivo microdialysis was used to study the effects of amphetamine on caudate extracellular acetylcholine and to compare these effects to the drug-induced behavioral response profile. Consistent with an inhibitory dopamine/acetylcholine interaction, the dopamine receptor agonist, apomorphine, decreased acetylcholine concentrations, while the dopamine receptor antagonist, haloperidol, increased acetylcholine. In contrast, an intermediate dose of amphetamine (1.75 mg/kg), did not significantly alter acetylcholine levels. Furthermore, a higher dose of amphetamine (5.0 mg/kg) promoted a two-fold increase in acetylcholine levels, and the increase paralleled the appearance of oral stereotypies in these animals. These results suggest that the effects of amphetamine on caudate acetylcholine, which may be implicated in the appearance of stereotyped behaviors, are not strictly dependent on caudate dopamine receptor activation.
引用
收藏
页码:53 / 58
页数:6
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