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Los núcleos frontoparietales aprovechan representaciones probabilísticas e incertidumbre integrada para guiar la
bioRxiv : the preprint server for biology
|September 5, 2025
Resumen
El cerebro integra creencias internas y señales externas usando distintas regiones neuronales. Los núcleos frontoparietales resuelven la incertidumbre ajustando dinámicamente la conectividad cerebral, permitiendo un comportamiento flexible.
Área de la Ciencia:
- La neurociencia
- Ciencias cognitivas
- Modelado computacional
Sus antecedentes:
- El comportamiento adaptativo se basa en la integración de información de múltiples fuentes, a menudo estocásticas e inciertas.
- Los mecanismos neuronales y computacionales para integrar la información interna y externa ruidosa siguen siendo en gran medida desconocidos.
Objetivo del estudio:
- Para aclarar cómo los sistemas cerebrales integran información estocástica mantenida internamente y externamente para guiar el comportamiento.
- Introducir un marco de neuroimagen computacional para el análisis de la integración de la información.
Principales métodos:
- Recogió datos de neuroimágenes de humanos adultos sanos.
- Desarrolló un modelo computacional para estimar las creencias prueba por prueba e integrarlas en una distribución de probabilidad conjunta.
- Incertidumbre cuantificada utilizando la entropía de la distribución conjunta para rastrear creencias, errores de predicción y dinámicas de actualización.
Principales resultados:
- Las regiones cerebrales distintas codifican las creencias de estado latente (giro frontal anterior medio, tálamo mediodorsal, lóbulo parietal inferior) y las creencias perceptivas (áreas temporo-occipitales laterales, surco intraparietal, surco precentral).
- La información integrada y su entropía convergieron en los núcleos frontoparietales (giro frontal medio, sulco intraparietal).
- Entropía reconfigurada de manera adaptativa con conectividad con circuitos de error sensorial, motor, premotor y de predicción.
Conclusiones:
- Los núcleos frontoparietales integran y resuelven la incertidumbre distribuida para guiar el comportamiento flexible.
- Los hallazgos revelan cómo los sistemas frontoparietales implementan la integración cognitiva de múltiples entradas ruidosas.
- Las poblaciones neuronales distintas codifican información interna y externa, que luego se integra mediante redes frontoparietales.
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