Exploration in the hippocampal-ablated albino rat.

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Abstract
16 male albino Holtzman rats with bilateral neocortical and hippocampal damage (HIPP group) explored a side alley off a straight runway much less frequently than 12 neocortical-ablated (CORT group) or 12 unoperated control Ss (NORM group) under conditions of reinforced and nonreinforced straight running. Changes in side-alley location failed to distract HIPP Ss from running down the straight runway. The NORM Ss decreased exploration to the same side alley but increased exploration to a novel-located side alley. The lack of exploration increase to the novel side alley in CORT Ss suggests that neocortical and slight hippocampal damage was sufficient to cause distraction deficits. When exploratory activity in the side alley was controlled, normal Ss ran faster down the main runway than brain-damaged Ss. (19 ref.) (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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