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Differential effects of glutamate N-methyl-D-aspartate receptor antagonists on risky choice as assessed in the risky decision task.
- Source :
-
Psychopharmacology [Psychopharmacology (Berl)] 2021 Jan; Vol. 238 (1), pp. 133-148. Date of Electronic Publication: 2020 Sep 16. - Publication Year :
- 2021
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Abstract
- Rationale: Risky choice can be measured using the risky decision task (RDT). In the RDT, animals choose between a large, risky option that is paired with probabilistic foot shock and a small, safe option that is never paired with shock. To date, studies examining the neurochemical basis of decision-making in the RDT have focused primarily on the dopaminergic system but have not focused on the glutamatergic system, which has been implicated in risky decision-making.<br />Objectives: Because glutamate is known to play a critical role in decision-making, we wanted to determine the contribution of the glutamatergic system to performance in the RDT.<br />Methods: In the experiment, 32 rats (16 male; 16 female) were tested in the RDT. The probability of receiving a foot shock increased across the session (ascending schedule) for half of the rats but decreased across the session (descending schedule) for half of the rats. Following training, rats received injections of the N-methyl-D-aspartate (NMDA) receptor competitive antagonist CGS 19755 (0, 1.0, 2.5, 5.0 mg/kg; s.c.) and the GluN2B-selective antagonist Ro 63-1908 (0, 0.1, 0.3, 1.0 mg/kg; s.c.).<br />Results: CGS 19755 (2.5 and 5.0 mg/kg) increased risky choice in males and females trained on the ascending schedule. Ro 63-1908 (1.0 mg/kg) decreased risky choice, but only in male rats trained on the ascending schedule.<br />Conclusions: Although NMDA receptor antagonists differentially alter risky choice in the RDT, the current results show that NMDA receptors are an important mediator of decision-making involving probabilistic delivery of positive punishment.
- Subjects :
- Animals
Dopamine metabolism
Female
Glutamates metabolism
Male
Phenols pharmacology
Piperidines pharmacology
Probability
Punishment psychology
Rats
Rats, Long-Evans
Decision Making drug effects
Excitatory Amino Acid Antagonists pharmacology
Receptors, N-Methyl-D-Aspartate antagonists & inhibitors
Risk
Subjects
Details
- Language :
- English
- ISSN :
- 1432-2072
- Volume :
- 238
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- Psychopharmacology
- Publication Type :
- Academic Journal
- Accession number :
- 32936321
- Full Text :
- https://doi.org/10.1007/s00213-020-05664-z