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Somatosensory, Motor, and Association Cortex01:24

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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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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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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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The cerebral cortex, a critical structure of the brain, is intricately divided into two hemispheres, each consisting of four distinct lobes: occipital, temporal, frontal, and parietal. These lobes function cooperatively to regulate various cognitive and sensory functions, forming the basis of our complex neural capabilities.
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The brain is an integral component of the nervous system and serves as the center for processing sensory inputs, making decisions, and directing bodily actions. This complex organ is organized into three primary sections: the hindbrain, midbrain, and forebrain, each responsible for a range of vital functions.
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Related Experiment Video

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Cross-Modal Multivariate Pattern Analysis
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A Domain-General Cognitive Core Defined in Multimodally Parcellated Human Cortex.

Moataz Assem1, Matthew F Glasser2,3,4, David C Van Essen2

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PubMed
Summary
This summary is machine-generated.

The multiple-demand (MD) system, crucial for cognitive control, has been precisely mapped in the brain. This study reveals its core anatomy, functional connections, and engagement across various tasks.

Keywords:
cognitive controldomain-generalfronto-parietalmultimodal cortical parcellationmultiple-demand

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Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Brain Imaging

Background:

  • Multiple-demand (MD) activation is consistently observed across diverse cognitive tasks, suggesting a role in cognitive control.
  • Previous brain imaging studies lacked the spatial resolution to precisely define the MD system's anatomy and connectivity.
  • Understanding the MD system's precise localization is key to elucidating its function in complex cognition.

Purpose of the Study:

  • To precisely delineate the anatomical regions comprising the multiple-demand (MD) system using high-resolution neuroimaging data.
  • To investigate the functional differentiation and connectivity patterns within the MD system.
  • To map the MD system's engagement with canonical brain networks during cognitive tasks.

Main Methods:

  • Utilized data from 449 subjects from the Human Connectome Project.
  • Parcellated individual cortical anatomy using neurobiologically grounded multimodal MRI features.
  • Conducted conjunction analyses of three cognitive contrasts to identify core and surrounding MD regions.

Main Results:

  • Identified a core of 10 bilateral MD parcels, highly activated and interconnected, surrounded by 17 additional areas.
  • MD activation was prominent in the caudate and cerebellum, beyond the cerebral cortex.
  • MD regions are concentrated in the fronto-parietal network but also involve three other resting-state networks.
  • MD activations exhibited modest task preferences alongside strong co-recruitment across tasks.

Conclusions:

  • The precisely delineated MD system exhibits a distributed anatomical organization and interconnectedness.
  • Mosaic functional preferences within the MD system support its role in integrating diverse cognitive operations.
  • This refined mapping provides a foundation for future research into the functional mechanisms of cognitive control.