The Role of the Dorsal Hippocampus in the Contextual Control of Appetitive Responding
Item
-
Title
-
The Role of the Dorsal Hippocampus in the Contextual Control of Appetitive Responding
-
Identifier
-
d_2009_2013:dfa08dacf2ea:10981
-
identifier
-
11334
-
Creator
-
Campese, Vincent,
-
Contributor
-
Andrew R. Delamater
-
Date
-
2011
-
Language
-
English
-
Publisher
-
City University of New York.
-
Subject
-
Psychology | Psychobiology | Behavioral psychology | Appetitive | Extinction | Hippocampus | Occasion-Setting | Renewal | Summation
-
Abstract
-
Four experiments were run using rat subjects in order to assess the impact of manipulations to the dorsal hippocampus (DH) on the contextual and temporal control of extinguished appetitive learning (e.g., magazine approach). Subjects were trained to associate discrete stimuli with food in specific locations or at specific times. The subjects then had these associations extinguished by means of omitting the food reinforcers following stimulus presentations. In order to assess contextual and temporal modulation of learning the stimuli were tested within as well as outside of the contexts or times where/when they were extinguished. Control subjects showed reduced responding when stimuli were presented within their extinction contexts (physical and temporal) whereas responding recovered outside of these extinction contexts (i.e., renewal and spontaneous recovery). In order to assess DH function in these different instances of response recovery, neurotoxic lesions of the DH prior to tests or temporary muscimol-induced inactivation of the structure were used. The results of these studies indicate that while DH manipulations fail to affect conditional control of appetitive extinction learning by physical contexts, they do impair control when temporal contexts are used as a conditional cue.
-
Type
-
dissertation
-
Source
-
2009_2013.csv
-
degree
-
Ph.D.
-
Program
-
Psychology
