Inactivation of the infralimbic prefrontal cortex in rats reduces the influence of inappropriate habitual responding in a response-conflict task

Haddon, Josephine Elizabeth and Killcross, Andrew Simon 2011. Inactivation of the infralimbic prefrontal cortex in rats reduces the influence of inappropriate habitual responding in a response-conflict task. Neuroscience 199 , pp. 205-212. 10.1016/j.neuroscience.2011.09.065

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Abstract

Previous research suggests the infralimbic cortex is important in situations when there is competition between goal-directed and habitual responding. Here we used a response conflict procedure to further explore the involvement of the infralimbic cortex in this relationship. Rats received training on two instrumental biconditional discriminations, one auditory and one visual, in two distinct contexts. One discrimination was “over-trained” relative to the other, “under-trained,” discrimination in the ratio 3:1. At test, animals were presented with incongruent audiovisual stimulus compounds of the training stimuli in the under-trained context. The stimulus elements of these test compounds have previously dictated different lever press responses during training. Rats receiving control infusions into the infralimbic cortex showed a significant interference effect, producing more responses to the over-trained (habitual), but context-inappropriate, stimulus element of the incongruent compound. This interference effect was abolished by inactivation of the infralimbic cortex; animals showed a reduced tendency to produce the habitual but inappropriate response compared with animals receiving control infusions. This finding provides evidence that the infralimbic cortex is involved in attenuating the influence of goal-directed behavior, for example context-appropriate responding.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Psychology Medicine MRC Centre for Neuropsychiatric Genetics and Genomics (CNGG) Neuroscience and Mental Health Research Institute (NMHRI)
Subjects:	B Philosophy. Psychology. Religion > BF Psychology R Medicine > RC Internal medicine > RC0321 Neuroscience. Biological psychiatry. Neuropsychiatry
Uncontrolled Keywords:	context; response conflict; habit; muscimol
Publisher:	Elsevier
ISSN:	0306-4522
Last Modified:	04 Jun 2017 04:02
URI:	https://orca.cardiff.ac.uk/id/eprint/31417

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