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Sincronización intersubjetivo de la actividad cortical durante la visión natural
Uri Hasson1, Yuval Nir, Ifat Levy
1Department of Neurobiology, Weizmann Institute of Science, Rehovot 76100, Israel.
Science (New York, N.Y.)
|March 16, 2004
Resumen
Los cerebros muestran una similitud notable durante la observación natural. Las imágenes cerebrales funcionales revelaron una actividad sincronizada entre los individuos, demostrando un "tiqueteo" colectivo en las cortes visuales y auditivas, incluso durante la visualización de películas complejas.
Área de la Ciencia:
- La neurociencia es la neurociencia.
- Neurociencia cognitiva y neurociencia cognitiva.
- Imágenes cerebrales de imágenes cerebrales.
Sus antecedentes:
- La comprensión de la función cerebral se basa en el estudio de la actividad neuronal.
- Las investigaciones anteriores a menudo se centran en estímulos controlados y no naturalistas.
- El grado de similitud del cerebro durante las condiciones naturalistas sigue siendo en gran parte inexplorado.
Objetivo del estudio:
- Investigar hasta qué punto los cerebros humanos exhiben patrones de actividad similares durante la estimulación naturalista visual y auditiva.
- Identificar puntos en común en la función cerebral de los individuos bajo condiciones de visión libre.
- Explorar la relación entre la sincronización neuronal y el contenido emocional en los medios.
Principales métodos:
- Se utilizó imágenes cerebrales funcionales (IRMf) para registrar la actividad cerebral en cinco sujetos.
- Los sujetos vieron libremente una película popular de 30 minutos.
- Un análisis imparcial involucró el uso de patrones de actividad espacio-temporal de un cerebro para modelar la actividad en otro (correlación funcional intersujeto).
Principales resultados:
- Se observó un alto grado de sincronización voxel por voxel entre los cerebros individuales.
- La sincronización se extendió más allá de las áreas sensoriales primarias para incluir las córtices de asociación.
- Los patrones de activación cortical generalizados se correlacionan con escenas de películas emocionalmente destacadas, junto con activaciones específicas por región.
Conclusiones:
- Los cerebros individuales exhiben una sorprendente tendencia a sincronizarse y 'tiquetear colectivamente' durante la visión natural.
- Esta actividad neuronal colectiva está influenciada tanto por la entrada visual / auditiva general como por el contenido emocional de los estímulos.
- Los hallazgos sugieren una base neuronal compartida para el procesamiento de estímulos naturalistas y complejos entre individuos.
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