Affordable Access

Access to the full text

Modulation of an activity response with associative and nonassociative fear in the rat: A lighting differential influences the form of defensive behavior evoked after fear conditioning

Authors
  • Godsil, Bill P.1
  • Blackmore, Michelle A.1
  • Fanselow, Michael S.1
  • 1 University of California, Department of Psychology, Los Angeles, CA, 90095 , Los Angeles
Type
Published Article
Journal
Learning & Behavior
Publisher
Springer-Verlag
Publication Date
Nov 01, 2005
Volume
33
Issue
4
Pages
454–463
Identifiers
DOI: 10.3758/BF03193184
Source
Springer Nature
Keywords
License
Yellow

Abstract

Rats confronted with the onset of a light gradient display a transient increase in locomotion called theactivity response (AR) and a dark preference (Godsil & Fanselow, 2004). These experiments demonstrate that the magnitude of the AR can be blunted with Pavlovian fear-conditioning procedures via associative and nonassociative fear. Although manifested in decreased locomotion, the blunted AR effect was not due to increased freezing or immobility behaviors. Instead, rats displayed reduced rearing and an increase in a class of behaviors calledstationary activity. These results suggest that the lighting differential supplied by the cue influences the topography of defensive behavior and reduces the expression of freezing. This procedure provides a means by which to examine learned and unlearned defensive responses to the same stimulus.

Report this publication

Statistics

Seen <100 times