Abstract
Choline acetyltransferase (ChAT) activity was measured in discrete areas of rat brain after chronic, unlimited access to self-administration of cocaine. Mean activity of ChAT was reduced by approximately 30% in the nucleus accumbens, both on the last day of cocaine access and after 3 weeks cocaine withdrawal. These data suggest that chronic cocaine exposure might inhibit nucleus accumbens cholinergic neurones which could underlie some of the behavioral effects of cocaine.
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