| Abstract: | Reports 6 studies with male hooded Wistar rats on the effects of 2,4,5-trihydroxyphenylethylamine (6-hydroxydopamine) on 2-way escape and avoidance learning. Ss were tested on either escape or avoidance learning at 80 days of age after chemical sympathectomy at birth or 40 or 80 days of age. Neonatal and chronic sympathectomy (at 40 days), but not acute sympathectomy (at 80 days), resulted in depressed escape learning. Avoidance learning was affected by neonatal sympathectomy and partially by acute sympathectomy. Results have implications for the role of the autonomic nervous system in escape-avoidance learning. (27 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved) |
