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The cerebral cortex, the brain's outermost layer, is pivotal in processing complex cognitive tasks, emotions, and various sensory inputs and executing voluntary motor activities. This intricate structure is divided into three primary functional areas: the motor areas, sensory areas, and association areas.
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Sensory impulses related to touch, pressure, vibration, and proprioception from various body parts, such as the limbs, trunk, neck, and posterior head, travel to the cerebral cortex through the posterior column-medial lemniscus pathway. The pathway’s name derives from the two white-matter tracts that convey the impulses: the spinal cord's posterior column and the brainstem's medial lemniscus. First-order sensory neurons extend their axons into the spinal cord, forming the...
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El flujo de información cortical durante las decisiones sensoriomotrices flexibles.

Markus Siegel1, Timothy J Buschman2, Earl K Miller3

  • 1Centre for Integrative Neuroscience and MEG Center, University of Tübingen, Tübingen, Germany. Picower Institute for Learning and Memory and Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. markus.siegel@uni-tuebingen.de.

Science (New York, N.Y.)
|June 20, 2015
PubMed
Resumen
Este resumen es generado por máquina.

El comportamiento flexible implica que las regiones cerebrales procesen la información sensorial, las tareas y las elecciones. Una nueva investigación revela un flujo de arriba hacia abajo de la información de la tarea y un flujo sensorial de abajo hacia arriba, lo que permite opciones sensoriomotrices a través de redes frontoparietales.

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Área de la Ciencia:

  • La neurociencia es la neurociencia.
  • Neurociencia cognitiva y neurociencia cognitiva.
  • La neurociencia de sistemas es la neurociencia de sistemas.

Sus antecedentes:

  • El comportamiento flexible se basa en la integración de diversas señales neuronales, incluida la entrada sensorial, el contexto de la tarea y las elecciones de comportamiento.
  • La evolución dinámica y la interacción de estas señales a través de diferentes regiones del cerebro siguen siendo incompletamente entendidas.

Objetivo del estudio:

  • Para investigar la dinámica temporal y el flujo de red de señales sensoriales, de tareas y de elección durante el comportamiento sensoriomotor flexible.
  • Para aclarar cómo la información se procesa e integra a través de múltiples áreas corticales para apoyar la toma de decisiones adaptativas.

Principales métodos:

  • Grabaciones neuronales simultáneas de seis regiones corticales (MT, V4, IT, LIP, PFC, FEF) en monos que realizan una tarea de reporte sensorial.
  • Análisis de patrones de actividad neuronal para rastrear el flujo y la evolución de diferentes tipos de información (sensorial, tarea, elección).

Principales resultados:

  • Se observó un barrido transitorio de abajo hacia arriba de la información sensorial, seguido de un flujo sostenido de arriba hacia abajo de la información de la tarea desde el frontoparietal hasta la corteza visual.
  • La información sensorial se propaga desde las áreas visuales a la corteza parietal y prefrontal.
  • Las señales relacionadas con la elección surgieron simultáneamente en las regiones frontoparietales y se proyectaron a los campos oculares frontales y a la corteza sensorial.

Conclusiones:

  • Las opciones sensoriomotrices flexibles surgen de una red frontoparietal que integra flujos de información con flujos direccionales opuestos.
  • Los hallazgos destacan una compleja interacción entre el procesamiento de arriba hacia abajo y el de abajo hacia arriba para apoyar la flexibilidad cognitiva y la toma de decisiones.