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Un área cortical selectiva para el procesamiento visual del cuerpo humano.
P E Downing1, Y Jiang, M Shuman
1School of Psychology, Centre for Cognitive Neuroscience, University of Wales, Bangor LL57 2AS, UK. p.downing@bangor.ac.uk
Science (New York, N.Y.)
|September 29, 2001
Resumen
Los investigadores descubrieron una región específica del cerebro en la corteza occipitotemporal lateral que procesa visualmente las imágenes del cuerpo humano. Este hallazgo sugiere un sistema neuronal especializado para la percepción corporal, distinto de las áreas de reconocimiento facial.
Área de la Ciencia:
- La neurociencia es la neurociencia.
- Psicología Cognitiva Psicología cognitiva.
- La percepción visual es la percepción visual.
Sus antecedentes:
- Si bien la corteza visual ha conocido regiones selectivas de rostros, la base neuronal para la percepción corporal sigue siendo menos comprendida.
- Las investigaciones anteriores se han centrado principalmente en la representación de rostros en el cerebro humano.
Objetivo del estudio:
- Investigar la existencia y ubicación de una región cortical distinta especializada en la percepción visual del cuerpo humano.
- Para comparar la respuesta neural a las imágenes del cuerpo con varios estímulos de control.
Principales métodos:
- Se realizaron estudios de imágenes de resonancia magnética funcional (IRMf) en sujetos humanos.
- Los participantes vieron imágenes del cuerpo humano junto con una gama de estímulos visuales de control.
Principales resultados:
- Una región cortical distinta en la corteza occipitotemporal lateral mostró una respuesta selectiva a las imágenes del cuerpo humano en todos los sujetos.
- La activación de esta región fue significativamente mayor para las imágenes corporales en comparación con los estímulos de control.
Conclusiones:
- Los hallazgos proporcionan evidencia sustancial de un sistema neuronal especializado en el cerebro humano dedicado a la percepción visual del cuerpo.
- Esta región identificada en la corteza occipitotemporal lateral representa un área clave para el procesamiento de la apariencia corporal.
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