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Neural Circuits

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Un circuito cortical para el control de ganancia por el estado de comportamiento.

Yu Fu¹, Jason M Tucciarone², J Sebastian Espinosa¹

¹Center for Integrative Neuroscience, Department of Physiology, University of California, 675 Nelson Rising Road, San Francisco, CA 94158, USA.

|March 18, 2014

Resumen

La locomoción mejora el procesamiento visual en el cerebro al activar neuronas específicas en la corteza visual primaria (V1). Este estudio identifica un circuito neuronal que involucra a las neuronas del péptido intestinal vasoactivo (VIP) que media este importante vínculo sensorial-conductual.

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Área de la Ciencia:

La neurociencia es la neurociencia.
Procesamiento Sensorial Procesamiento Sensorial
Modulación del comportamiento.

Sus antecedentes:

El estado conductual influye significativamente en el procesamiento sensorial en el cerebro.
Se sabe que la locomoción mejora las respuestas visuales en la corteza visual primaria (V1) de los ratones, lo que representa un ejemplo clave de modulación dependiente del estado.

Objetivo del estudio:

Para identificar los circuitos neuronales específicos responsables de la transmisión de información sobre el estado del comportamiento a la corteza sensorial.
Para aclarar los mecanismos por los cuales la locomoción mejora las respuestas visuales en V1.1.

Principales métodos:

In vivo imágenes de calcio en el comportamiento de los ratones.
Manipulación optogenética de la actividad neuronal.
Daño fotolítico a poblaciones neuronales específicas.
Grabaciones electrofisiológicas para evaluar las respuestas neuronales.

Principales resultados:

La locomoción activa las neuronas positivas al péptido intestinal vasoactivo (VIP) en el ratón V1, independientemente de la entrada visual.
Las entradas nicotínicas del cerebro anterior basal son cruciales para la activación de las neuronas VIP inducida por la locomoción.
La activación optogenética de las neuronas VIP imitaba el efecto de la locomoción en las respuestas visuales V1.
La interrupción de las neuronas VIP abolió la mejora inducida por la locomoción de las respuestas V1.

Conclusiones:

Un circuito cortical específico que involucra a las neuronas VIP media la mejora de las respuestas visuales durante la locomoción.
Este circuito de neuronas VIP proporciona una vía común potencial para la modulación dependiente del estado del procesamiento sensorial.