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Related Concept Videos

Somatosensory, Motor, and Association Cortex01:23

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.
Motor Areas
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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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Major Somatic Sensory Pathways01:28

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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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The human brain, a complex organ, is functionally divided into two cerebral hemispheres—left and right. These hemispheres are interconnected by a structure of paramount importance, the corpus callosum. This substantial bundle of neural fibers is not just a bridge between the hemispheres but a crucial element for the brain's comprehensive functioning. It enables efficient communication between the two hemispheres, allowing each side of the brain to control and receive sensory and motor...
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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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In Vivo Wireless Optogenetic Control of Skilled Motor Behavior
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Systems Neuroscience: How the Cortex Contributes to Skilled Movements.

Kara G Pratt1, Jonathan F Prather1

  • 1Department of Zoology and Physiology, University of Wyoming, Laramie, WY 82071, USA.

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Summary

Acute neural circuit manipulation can overestimate function, but chronic changes reveal plasticity that restores behavior. This highlights the importance of considering manipulation duration in neuroscience research.

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Area of Science:

  • Neuroscience
  • Systems Neuroscience
  • Neural Plasticity

Background:

  • Understanding neural circuit function is crucial in neuroscience.
  • Acute and chronic manipulations can yield different insights into circuit dynamics.

Purpose of the Study:

  • To investigate the impact of acute versus chronic neural circuit manipulations on the estimation of circuit function.
  • To identify compensatory mechanisms of neural plasticity.

Main Methods:

  • Employing acute and chronic manipulation techniques in neural circuits.
  • Assessing circuit function and behavioral outcomes.

Main Results:

  • Acute manipulations led to overestimations of neural circuit function.
  • Chronic manipulations revealed compensatory plasticity, restoring behavioral function.

Conclusions:

  • The duration of neural circuit manipulation significantly influences the interpretation of circuit function.
  • Compensatory plasticity plays a key role in maintaining behavior despite neural alterations.