Hyperactivity and impulsiveness in rats fed diets supplemented with either Aroclor 1248 or PCB-contaminated St. Lawrence river fish.
Behav Brain Res
; 126(1-2): 1-11, 2001 Nov 29.
Article
en En
| MEDLINE
| ID: mdl-11704246
ABSTRACT
We examined whether exposure to polychlorinated biphenyls (PCBs) around puberty would produce hyperactivity and impulsiveness in adult Sprague-Dawley rats. Randomly assigned groups consumed food containing environmental concentrations of Aroclor 1248, PCB-contaminated St. Lawrence River carp, or corn oil (control). All received operant training to a final multiple (mult) 120-s, fixed interval (FI), 5-min extinction (EXT) schedule. Pressing rates of both exposed groups for drops of water averaged more than 1.5 times that of controls, especially toward the end of the 120-s interval. This overactivity included bursts with short (< or =0.5 s) interresponse times (IRTs), behavior characteristic of hyperactive boys and genetically hyperactive rats. The exposed groups also overreacted to the decreases in reinforcement density associated with transition to the final schedule. The results were interpreted in terms of the possible alterations in the animals' reinforcement mechanisms and the possible neurotoxic effects of PCB exposure.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Arocloros
/
Contaminantes Químicos del Agua
/
Carpas
/
Contaminación de Alimentos
/
Bifenilos Policlorados
/
Conducta Impulsiva
/
Actividad Motora
Límite:
Animals
País/Región como asunto:
America do norte
Idioma:
En
Revista:
Behav Brain Res
Año:
2001
Tipo del documento:
Article
País de afiliación:
Estados Unidos