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Sistemas neuronales que subyacen a la supresión de recuerdos no deseados
Michael C Anderson1, Kevin N Ochsner, Brice Kuhl
1Department of Psychology, University of Oregon, Eugene, OR 97403, USA. mcanders@darkwing.uoregon.edu
Science (New York, N.Y.)
|January 13, 2004
Resumen
Los científicos utilizaron imágenes cerebrales para estudiar cómo olvidamos activamente los recuerdos no deseados. El aumento de la actividad prefrontal y la reducción de la actividad del hipocampo se relacionaron con la supresión exitosa de los recuerdos, lo que sugiere una base biológica para el olvido motivado.
Área de la Ciencia:
- La neurociencia es la neurociencia.
- Psicología Cognitiva Psicología cognitiva.
Sus antecedentes:
- Sigmund Freud propuso que los recuerdos no deseados pueden ser excluidos activamente de la conciencia, un proceso llamado represión.
- Los mecanismos neuronales precisos que subyacen a este olvido motivado siguen siendo en gran medida desconocidos.
Objetivo del estudio:
- Para identificar los sistemas neuronales involucrados en la supresión activa de recuerdos no deseados de la conciencia.
- Para investigar el papel del cerebro en el proceso de olvido motivado.
Principales métodos:
- Se empleó imágenes de resonancia magnética funcional (IRMf) para observar la actividad cerebral durante las tareas de control de la memoria.
- Los participantes participan en tareas diseñadas para provocar y luego suprimir recuerdos no deseados.
Principales resultados:
- El control de los recuerdos no deseados se correlacionó con un aumento de la activación en la corteza prefrontal dorsolateral.
- Se observó una activación reducida en el hipocampo durante la supresión de la memoria.
- La retención deteriorada de los recuerdos reprimidos era evidente, con la magnitud del olvido predicha por la actividad prefrontal e hipocampal.
Conclusiones:
- Los hallazgos proporcionan evidencia de un proceso de olvido activo, biológicamente basado.
- Se propone un modelo neurobiológico para guiar futuras investigaciones sobre el olvido motivado y el control de la memoria.
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