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Operant Sensation Seeking in the Mouse
Published on: November 10, 2010
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El comportamiento espontáneo está estructurado por refuerzo sin recompensa explícita
Jeffrey E Markowitz1,2, Winthrop F Gillis1, Maya Jay1
1Department of Neurobiology, Harvard Medical School, Boston, MA, USA.
Nature
|January 18, 2023
Resumen
Fluctuaciones de la dopamina en el cerebro
Área de la Ciencia:
- La neurociencia
- El comportamiento de los animales
Sus antecedentes:
- El comportamiento animal espontáneo está compuesto de módulos de acción secuenciados por el cerebro.
- Los mecanismos neuronales que controlan el comportamiento naturalista y auto-motivado siguen sin estar claros.
Objetivo del estudio:
- Investigar el papel de la dopamina en el estriado dorsolateral (DLS) durante el comportamiento espontáneo.
- Comprender cómo las fluctuaciones de la dopamina dan forma a las secuencias de comportamiento y la expresión del módulo.
Principales métodos:
- Utilizó registros fotométricos y manipulaciones optogenéticas en ratones durante la exploración en campo abierto.
- Optogenética de circuito cerrado calibrada para controlar con precisión los niveles de dopamina.
Principales resultados:
- Las fluctuaciones de dopamina en el DLS se correlacionan con la secuenciación del módulo de comportamiento espontáneo.
- La dopamina DLS influye en la variación de la secuencia, el refuerzo del módulo con el tiempo y el vigor del comportamiento.
- Los efectos de la manipulación optogenética de la dopamina variaron entre los módulos y los individuos, predichos por las relaciones endógenas de la dopamina.
Conclusiones:
- La dopamina en el DLS puede actuar como una señal de enseñanza, guiando a los ratones a maximizar la dopamina durante la generación de secuencias.
- Sugiere que los circuitos involucrados en tareas estructuradas también dan forma a comportamientos no restringidos y espontáneos.
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