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Related Concept Videos

Somatosensory, Motor, and Association Cortex01:24

Somatosensory, Motor, and Association Cortex

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The somatosensory cortex in the parietal lobes is crucial for interpreting sensory data such as touch, temperature, and proprioception. The somatosensory cortex, situated in the parietal lobes, plays a vital role in interpreting sensory information like touch, temperature, and proprioception—awareness of body position. This specialized brain region features an organized structure wherein neurons at the top primarily process sensations originating from the lower body. In contrast, those at...
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Motor and Sensory Areas of the Cortex01:14

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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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Cognitive learning is based on purposive behavior, incidental learning, and insight learning.
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Association Areas of the Cortex01:21

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Association areas are regions of the cerebral cortex that do not have a specific sensory or motor function. Instead, they integrate and interpret information from various sources to enable higher cognitive processes such as memory, learning, and decision-making. Some key association areas include the following:
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Direct Motor Pathways01:11

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The direct motor pathways, also known as the pyramidal tracts, are a group of neural pathways that originate in the brain and descend through the spinal cord. They control the voluntary movement of the body. There are two major direct motor pathways: the corticospinal and the corticobulbar tracts.
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The thalamus, often called “the gateway to the cerebral cortex,” is vital in processing and directing sensory and motor signals throughout the brain. Almost all inputs destined for the cerebral cortex, except for olfactory signals, are relayed through the thalamus. The thalamus is  a sophisticated relay station, channeling information from various brain regions to the cerebral cortex, as well as a filter, prioritizing certain signals over others based on current physiological...
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Updated: Sep 6, 2025

Intracortical Inhibition Within the Primary Motor Cortex Can Be Modulated by Changing the Focus of Attention
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Cortical-subcortical interactions in goal-directed behavior.

K Guadalupe Cruz1, Yi Ning Leow1, Nhat Minh Le1

  • 1Picower Institute for Learning and Memory, Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts.

Physiological Reviews
|June 30, 2022
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Summary
This summary is machine-generated.

Flexible action selection involves cortical and subcortical brain regions. Emerging research reveals these regions form collaborative networks, challenging traditional hierarchical models for adaptive behavior.

Keywords:
attentioncortical-subcortical interactionssensorimotor transformationstriatumsuperior colliculus

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Computational Neuroscience

Background:

  • Traditional models view cortical-subcortical interactions hierarchically, with cortex exerting top-down control.
  • Subcortical regions are traditionally associated with rapid, stimulus-driven responses, while the neocortex handles adaptability and context.
  • Recent technological advancements reveal brain-wide activity representations and early choice signals in subcortical structures.

Purpose of the Study:

  • To review the evolving understanding of cooperative interactions between cortical and subcortical regions in placental mammals.
  • To challenge the strict hierarchical view of brain function and propose a network-based model.
  • To explore information prioritization and network formation within and between brain regions.

Main Methods:

  • Review of current literature on cortical and subcortical circuitry.
  • Analysis of information processing in the superior colliculus and striatum.
  • Examination of functional circuits involving the cortex, subcortical structures, and thalamus.

Main Results:

  • Behavioral functions emerge from collaborative networks, not strict hierarchies.
  • Interactions involve both top-down cortical-subcortical inputs and bottom-up thalamic interactions.
  • Specific brain regions prioritize distinct information types, contributing to specialized subnetworks.

Conclusions:

  • The classic view of localized functional modules is challenged.
  • Brain specialization arises from dynamic subnetworks formed by interconnected regions.
  • Cooperative network interactions, including thalamic pathways, are crucial for flexible action selection.