Hippocampal and body temperature changes in rats during delayed matching-to-sample performance in a cold environment.
Physiol Behav
; 50(5): 1013-8, 1991 Nov.
Article
en En
| MEDLINE
| ID: mdl-1805262
ABSTRACT
In order to study the effects of temperature changes induced by cold stress on working memory, telemetry thermistor probes were implanted into the hippocampal region of the brain and into the peritoneal cavity of rats. Temperatures in these regions were monitored while rats performed on a delayed matching-to-sample (DMTS) task at ambient temperatures of 23 degrees C and 2 degrees C. Matching accuracy was significantly decreased during exposure to 2 degrees C, indicating a marked impairment of short-term or working memory. Temperature in the hippocampus increased 2 degrees C during exposure to 23 degrees C, but only 1 degrees C when the environmental temperature was 2 degrees C. Body temperature showed a similar but less pronounced pattern in that cold exposure attenuated the increase in temperature observed when animals performed the DMTS task. These results suggest that cold-induced impairment of working memory may be associated with subtle temperature changes in the brain.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Nivel de Alerta
/
Recuerdo Mental
/
Atención
/
Percepción Visual
/
Regulación de la Temperatura Corporal
/
Aprendizaje Discriminativo
/
Hipocampo
Límite:
Animals
Idioma:
En
Revista:
Physiol Behav
Año:
1991
Tipo del documento:
Article