Abstract:
:The intermediate and medial hyperstriatum ventrale (IMHV) of the chick forebrain is a site of recognition memory for the learning process of imprinting. The results reported here demonstrate that neural cell adhesion molecules (NCAMs) play a time-dependent role in this recognition memory. Dark-reared chicks were trained, tested, and assigned a preference score as a measure of learning. Chicks with high preference scores were designated good learners and those with lower preference scores, poor learners. Controls were untrained. Tissue was removed, 9.5 hr or 24 hr after training, from the left and right IMHV, hyperstriatum accessorium, and posterior neostriatum. Three major NCAM isoforms (180, 140, and 120 kDa) were assayed. At 24 hr only, there was in left IMHV significantly more NCAM (for each isoform) in good learners than in the other 2 groups, and also a significant correlation between the amounts of NCAM and preference scores for all isoforms; the amount predicted by each regression line at preference score 50 (no learning) did not differ significantly from the mean value for untrained controls. There were no learning-related effects in either the hyperstriatum accessorium or the posterior neostriatum.
journal_name
Behav Neuroscijournal_title
Behavioral neuroscienceauthors
Solomonia RO,McCabe BJ,Horn Gdoi
10.1037//0735-7044.112.3.646subject
Has Abstractpub_date
1998-06-01 00:00:00pages
646-55issue
3eissn
0735-7044issn
1939-0084journal_volume
112pub_type
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