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Correction for Hatfield et al., J. Neurosci. 16 (16) 5256-5265.
The Journal of Neuroscience, August 20, 2003, 23(20):7702-7709

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Preserved Sensitivity to Outcome Value after Lesions of the Basolateral Amygdala

Pam Blundell,¹ Geoffrey Hall,¹ and Simon Killcross²

¹Department of Psychology, University of York, Heslington, York YO10 5DD, United Kingdom, and ²School of Psychology, Cardiff University, Cardiff CF10 3YG, United Kingdom

Recent work (Blundell et al., 2001; Balleine et al., 2003) has suggested that the basolateral region of the amygdala (BLA) is important in the representation of the sensory and incentive aspects of motivationally significant events. In common with other theories of function of the BLA, this predicts that lesions of the BLA will interfere with reinforcer devaluation after appetitive Pavlovian or instrumental conditioning. However, this hypothesis also predicts that BLA lesions will be without effect on postconditioning changes in reinforcer value if initial learning is only about the sensory aspects of otherwise neutral events. This interpretation is supported by evidence for significant detrimental effects of BLA lesions on reinforcer devaluation in a Pavlovian autoshaping procedure, but no effect of postconditioning devaluation using a sensory preconditioning procedure. These results demonstrate that animals with BLA lesions can remain sensitive to post-training changes in the motivational value of outcomes.

Key words: appetitive conditioning; basolateral amygdala; reward; sensory preconditioning; Pavlovian; instrumental; devaluation

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Received Mar. 17, 2003; revised Jun. 30, 2003; accepted Jul. 2, 2003.

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