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El aprendizaje del miedo mejora las respuestas neuronales a los estímulos sensoriales predictivos de amenazas
Marley D Kass1, Michelle C Rosenthal1, Joseph Pottackal1
1Behavioral and Systems Neuroscience Section, Department of Psychology, Rutgers, The State University of New Jersey, 152 Frelinghuysen Road, Piscataway, NJ 08854.
Science (New York, N.Y.)
|December 17, 2013
Resumen
El condicionamiento del miedo mejora la salida de las neuronas sensoriales olfativas a olores predictivos de choque. Esto sugiere que las primeras representaciones sensoriales en el sistema nervioso pueden codificar información afectiva sobre el peligro.
Área de la Ciencia:
- La neurociencia es la neurociencia.
- El procesamiento sensorial es el procesamiento sensorial.
- El miedo aprende a aprender.
Sus antecedentes:
- El sistema nervioso central aprende a asociar estímulos neutros con el peligro.
- Este aprendizaje del miedo típicamente involucra regiones corticales y límbicas.
- La neuroplasticidad asociativa en las estructuras sensoriales está ganando reconocimiento.
Objetivo del estudio:
- Investigar si las neuronas sensoriales olfativas (OSN) cambian su salida sináptica después del condicionamiento del miedo.
- Para determinar si la representación neural más temprana de un estímulo puede codificar información afectiva.
Principales métodos:
- Salida sináptica observada de las RSO individuales de ratón.
- La salida de OSN medida antes y después del acondicionamiento del miedo.
- Utilizó un choque de pie como la señal de peligro inminente asociada con un olor específico.
Principales resultados:
- La salida sináptica de OSN evocada por el olor predictivo de choque se facilitó selectivamente después del condicionamiento del miedo.
- Esto indica un cambio en la respuesta de las neuronas sensoriales basado en la asociación aprendida.
Conclusiones:
- La información afectiva, como el peligro, puede codificarse en las etapas iniciales del procesamiento sensorial.
- La neuroplasticidad ocurre incluso en las neuronas sensoriales primarias del sistema olfativo.
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