Four experiments using the partial agonist D-cycloserine (DCS) were conducted to investigate the role of the N-methyl D-aspartate (NMDA) receptor in consummatory successive negative contrast (cSNC), an animal model of loss-induced anxiety. In Experiment 1, pretrial 11 and 12 administration of DCS (30 mg/kg) enhanced cSNC following the reward downshift from 32%-to-4% sucrose solution. In Experiment 2, posttrial 11 administration of DCS enhanced cSNC greatest at 30 mg/kg, following 32%-to-4%, and mildly following 32%-to-6%. In Experiment 3, DCS at 15 mg/kg and 60 mg/kg prolonged cSNC mildly (32%-to-4%). Experiment 4 suggested enhancement was not the result of conditioned taste aversion (CTA) to DCS (30 mg/kg); CTA to novel 4% solution failed to develop, compared to unpaired and saline controls. Results were interpreted to mean that activation of NMDA receptors via the glycine-modulatory site enhances the aversive memory associated with unexpected reward loss. Possible applications for therapeutic settings are discussed.
| Identifer | oai:union.ndltd.org:TCU/oai:etd.tcu.edu:etd-10152009-100239 |
| Date | 15 October 2009 |
| Creators | Norris, Jacob Neal James |
| Contributors | Mauricio R Papini |
| Publisher | Texas Christian University |
| Source Sets | Texas Christian University |
| Language | English |
| Detected Language | English |
| Type | text |
| Format | application/pdf, application/msword |
| Source | http://etd.tcu.edu/etdfiles/available/etd-10152009-100239/ |
| Rights | unrestricted, I hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to TCU or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report. |
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