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Behavioral and neurochemical mechanisms of the action of mild stress in the enhancement of feeding

Biomedical Sciences Research Institute Computer Science Research Institute Environmental Sciences Research Institute Nanotechnology & Advanced Materials Research Institute

O'Hare, E, Shaw, David, Tierney, KJ, Kim, Eun-Mee, Levine, AS and Shephard, RA (2004) Behavioral and neurochemical mechanisms of the action of mild stress in the enhancement of feeding. BEHAVIORAL NEUROSCIENCE, 118 (1). pp. 173-177. [Journal article]

Full text not available from this repository.

DOI: 10.1037/0735-7044.118.1.173


Rats were trained to respond under a cyclic-ratio schedule of reinforcement composed of an ascending, followed by a descending, sequence of ratio values. Subjects were trained while exposed to 70 dB white noise, then tested while exposed to 70 or 90 dB white noise. Exposure to 90 dB white noise elevated the response function (p < .02). Naloxone was then administered intraperitoneally at 0.3, 1.0, and 3.0 mg/kg under 70 dB and 90 dB white noise. Naloxone administration (1.0 and 3.0 mg/kg) significantly depressed the response function obtained under 90 dB white noise (ps < .01) but did not affect the function obtained under 70 dB white noise. These findings suggest that mild stress increases food intake through a mechanism affecting palatability enhanced by the release of endogenous opioids.

Item Type:Journal article
Faculties and Schools:Faculty of Life and Health Sciences
Faculty of Life and Health Sciences > School of Psychology
Research Institutes and Groups:Psychology Research Institute
Psychology Research Institute > Behavioural Neuroscience & Behavioural Analysis
ID Code:1636
Deposited By:Mrs Fiona Harkin
Deposited On:23 Dec 2009 09:28
Last Modified:13 Mar 2012 16:34

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