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La memoria de lugares aprendidos hace mucho tiempo está intacta después de un daño en el hipocampo
1Veterans Affairs Medical Center, San Diego, California 92161, USA.
Nature
|August 24, 1999
Resumen
El hipocampo es crucial para la formación de nuevos recuerdos a largo plazo. E.P. del paciente. con daño en el hipocampo podría recordar información espacial antigua pero no ambientes recientes, desafiando al hipocampo.
Área de la Ciencia:
- La neurociencia es la neurociencia.
- Psicología Cognitiva Psicología cognitiva.
- La neurobiología es la neurobiología.
Sus antecedentes:
- El hipocampo, dentro del lóbulo temporal medial, es ampliamente considerado vital para la formación y recuperación de la memoria.
- Una teoría prominente postula que el hipocampo construye y almacena mapas espaciales, esenciales para recordar ubicaciones.
Objetivo del estudio:
- Para investigar el papel del hipocampo y las estructuras del lóbulo temporal medial en la recuperación de recuerdos espaciales muy remotos.
- Para probar la hipótesis de que estas estructuras son esenciales para formar recuerdos declarativos a largo plazo, pero no para recordar recuerdos muy antiguos.
Principales métodos:
- Evaluó las habilidades de recuerdo espacial de un paciente (E.P.) con extenso daño bilateral en el hipocampo y en el lóbulo temporal medial.
- El E.P.E. es muy fuerte. se le pidió que describiera el diseño espacial de su vecindario de la infancia, un lugar que no había habitado durante más de 50 años.
- Comparado el E.P. El estudio comparó el rendimiento del niño con controles de la misma región y probó su conocimiento de su vecindario actual y más reciente.
Principales resultados:
- El E.P.E. es muy fuerte. demostró un recuerdo intacto del diseño espacial de su remoto vecindario de la infancia, con un rendimiento comparable o mejor que los controles.
- Por el contrario, el E.P. carecía de conocimiento de su actual vecindario, al que se mudó después de su aparición de amnesia.
Conclusiones:
- El lóbulo temporal medial no es el sitio de almacenamiento permanente para los mapas espaciales.
- El hipocampo y las estructuras adyacentes del lóbulo temporal medial son críticas para la formación de recuerdos declarativos a largo plazo (espaciales y no espaciales).
- Estas estructuras no son necesarias para la recuperación de recuerdos muy remotos.
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