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A Real-world What-Where-When Memory Test
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Memoria tipo episódica en ratas: ¿se basa en cuándo o hace cuánto tiempo?
William A Roberts1, Miranda C Feeney, Krista Macpherson
1Department of Psychology, University of Western Ontario, London, Ontario, N6A 5C2, Canada. roberts@uwo.ca
Science (New York, N.Y.)
|April 5, 2008
Resumen
Las ratas demuestran memoria para la comida, pero principalmente recuerdan hace cuánto tiempo se encontró, no la hora específica. Esto sugiere que la memoria episódica de la rata difiere de la memoria episódica humana.
Área de la Ciencia:
- La neurociencia cognitiva es la neurociencia cognitiva.
- Comportamiento animal Comportamiento animal.
Sus antecedentes:
- Las ratas exhiben una memoria episódica, recordando qué, dónde y cuándo encontraron comida.
- La capacidad de recordar "cuándo" ocurrió un evento es crucial para comprender la cognición temporal.
Objetivo del estudio:
- Para investigar si la memoria episódica de las ratas se basa en recordar el momento específico de un evento o la duración transcurrida desde el evento.
- Para diferenciar entre la memoria de "cuándo" y "hace cuánto tiempo" en ratas.
Principales métodos:
- Tres grupos de ratas fueron entrenados para recordar la ubicación de los alimentos en un laberinto radial.
- Cada grupo se limitó a señales temporales específicas: "cuándo" se encontró el alimento, "hace cuánto tiempo" se encontró, o una combinación de ambos.
- El rendimiento se evaluó en función de la capacidad de las ratas para recordar la ubicación de la comida utilizando las señales temporales proporcionadas.
Principales resultados:
- Las ratas podrían utilizar con éxito la señal de "hace cuánto tiempo" para recordar las ubicaciones de los alimentos.
- Las ratas no fueron capaces de utilizar efectivamente la señal de "cuándo" por sí solas.
- La efectividad de la señal combinada "cuándo + hace cuánto tiempo" fue limitada, lo que sugiere una dependencia del componente "hace cuánto tiempo".
Conclusiones:
- La memoria de tipo episódico de la rata parece basarse principalmente en el tiempo transcurrido desde un evento, en lugar del contexto temporal específico.
- Estos hallazgos indican que la memoria de tipo episódico en ratas puede ser cualitativamente distinta de la memoria episódica humana, particularmente en lo que respecta al recuerdo temporal.
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