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La actividad corticostriatal dinámica sesga el vínculo social en las hembras monógamas de las praderas
Elizabeth A Amadei1,2,3, Zachary V Johnson1,4,5, Yong Jun Kwon1,3,4
1Silvio O. Conte Center for Oxytocin and Social Cognition, Center for Translational Social Neuroscience, Emory University, Atlanta, Georgia 30322, USA.
Nature
|June 1, 2017
Resumen
El vínculo de pareja fortalece rápidamente las conexiones neuronales en el cerebro
Área de la Ciencia:
- La neurociencia
- Biología del comportamiento
- Ciencias sociales
Sus antecedentes:
- El vínculo de pareja de adultos implica cambios significativos en la forma en que los individuos perciben y valoran a las parejas.
- Las parejas activan el sistema de recompensa del cerebro, pero los mecanismos neuronales no se comprenden completamente.
Objetivo del estudio:
- Investigar los mecanismos neuronales que subyacen a la recompensa de la pareja y el comportamiento afiliativo durante la formación de lazos sociales.
- Para identificar los circuitos cerebrales específicos involucrados en la mejora de los comportamientos afiliación.
Principales métodos:
- Utilizó un modelo de ave de las praderas (Microtus ochrogaster) para estudiar la vinculación social.
- Se midió la conectividad funcional entre la corteza prefrontal medial y el núcleo accumbens.
- Actividad de circuito manipulada en un contexto social para evaluar su papel causal.
Principales resultados:
- Descubrió que la modulación dinámica del circuito prefrontal-núcleo accumbens mejora el comportamiento afiliativo femenino.
- Las diferencias individuales en la fuerza de conectividad del circuito predicen la velocidad de la preferencia del socio.
- La activación rítmica de este circuito acelera causalmente la preferencia de pareja, incluso sin apareamiento.
Conclusiones:
- Las interacciones sociales reclutan dinámicamente los sistemas de recompensa del cerebro para impulsar el comportamiento afiliativo durante la formación de vínculos.
- El circuito de la corteza prefrontal medial al núcleo accumbens juega un papel causal en la aceleración de la vinculación social.
- Este estudio proporciona una visión dinámica de la actividad corticostriatal durante la formación de vínculos sociales.
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