Varied effects of conventional antiepileptics on responding maintained by negative versus positive reinforcement.
Physiol Behav
; 93(3): 612-21, 2008 Feb 27.
Article
en En
| MEDLINE
| ID: mdl-18061218
We analyzed the effects of four conventional antiepileptic drugs (AEDs) - carbamazepine (CBZ), ethosuximide (ETH), phenytoin (PHT), and valproate (VPA) - on operant behavior maintained by negative or positive reinforcement contingencies. Rats were trained to lever press on a free-operant avoidance schedule or variable-interval (VI) schedule of appetitive reinforcement. Dose-effect functions were separately established on each reinforcement contingency for CBZ (12.5-100 mg/kg), ETH (25-200 mg/kg), PHT (12.5-50 mg/kg), and VPA (50-400 mg/kg). CBZ and PHT reduced responding on free-operant avoidance and VI appetitive reinforcement tasks, with positively reinforced behavior reduced at lower drug dosages than negatively reinforced responding. ETH and VPA reduced responding on the VI appetitive reinforcement task, but did not alter behavior maintained on the free-operant avoidance schedule. Our results suggest that conventional AEDs vary in their effect on operant behavior, depending on the type of reinforcement process maintaining responding.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Refuerzo en Psicología
/
Condicionamiento Operante
/
Anticonvulsivantes
Límite:
Animals
Idioma:
En
Revista:
Physiol Behav
Año:
2008
Tipo del documento:
Article
País de afiliación:
Estados Unidos
Pais de publicación:
Estados Unidos