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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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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 cerebellum, while traditionally associated with motor control, also plays a crucial role in memory, particularly in procedural memory, which involves learning motor tasks that become automatic through repetition. For example, studies have shown that when the cerebellum is damaged, individuals or animals lose the ability to learn conditioned motor responses, such as the conditioned eye-blink response in classical conditioning experiments with rabbits. This study demonstrates the...
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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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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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Shared Neural Activity But Distinct Neural Dynamics for Cognitive Control in Monkey Prefrontal and Parietal Cortex.

Rachael K Blackman1,2,3, David A Crowe2,4, Adele L DeNicola1,2

  • 1Department of Neuroscience, University of Minnesota, Minneapolis, Minnesota 55455.

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience
|March 9, 2023
PubMed
Summary
This summary is machine-generated.

Researchers studied prefrontal cortex (PFC) and parietal cortex in monkeys to understand cognitive control deficits seen in schizophrenia. Both brain areas showed similar single-neuron activity but distinct population dynamics, suggesting different roles in cognitive control.

Keywords:
AX-CPTcognitive controlmonkeyparietalprefrontalschizophrenia

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Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Primate Neurophysiology

Background:

  • Schizophrenia is associated with cognitive control deficits.
  • Prefrontal cortex (PFC) and parietal cortex are implicated in cognitive control.
  • Understanding neural mechanisms underlying cognitive control is crucial for treating related disorders.

Purpose of the Study:

  • To investigate how prefrontal and parietal cortical networks mediate cognitive control.
  • To characterize neural activity in PFC and parietal cortex during a task measuring cognitive control relevant to schizophrenia.
  • To compare the roles of PFC and parietal cortex in proactive and reactive cognitive control.

Main Methods:

  • Recorded neural activity (single-unit and local field potentials) in the PFC and parietal cortex of two male monkeys.
  • Utilized a variant of the AX continuous performance task, adapted to study cognitive control deficits.
  • Analyzed neural firing rates, population dynamics, oscillatory activity, and temporal correlations during task performance.

Main Results:

  • Parietal and PFC neurons showed similar activity patterns at the single-neuron level.
  • Distinct population dynamics were observed between PFC and parietal cortex, indicating differential contributions.
  • PFC exhibited stronger and more persistent encoding of contextual information compared to parietal cortex.
  • Cognitive control demand biased contextual information representation towards the PFC and increased neural synchrony.

Conclusions:

  • While single neurons show similar task-evoked activity, distinct population dynamics in PFC and parietal cortex suggest specialized roles in cognitive control.
  • PFC and parietal cortex contribute differentially to cognitive control, with evidence for proactive and reactive control mechanisms in both areas.
  • Findings provide insights into the neural basis of cognitive control deficits relevant to schizophrenia.