Journal
NEUROBIOLOGY OF LEARNING AND MEMORY
Volume 81, Issue 2, Pages 155-158Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.nlm.2003.12.002
Keywords
bird; domestic chick; striatum; dopamine; avoidance training; taste aversion; avian brain; memory; learning
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The avian lobus parolfactorius, equivalent to the medial striatum (caudate-putamen) of mammals, has been shown to be of crucial importance in passive avoidance training in day-old domestic chicks, where the aversive stimulus is the bitter tasting substance methylanthranilate. Here we report that the specific D1 antagonist SCH23390, injected into the lobus parolfactorius of day-old chicks (Gallus domesticus) prior to training, impaired performance on testing 30 min post-training at low doses (0.5 and 25 nmol). Sulpiride, a D2 antagonist, had no significant effect on performance in comparable doses. The early D1 activation may signify an essential mechanism leading to storage itself or to the canalisation of the relevant association to a permanent store. (C) 2003 Elsevier Inc. All rights reserved.
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