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Related Concept Videos

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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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 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 indirect motor or extrapyramidal pathways originate in the brainstem, the lower portion of the brain that connects it to the spinal cord. They consist of several distinct tracts, each with specialized functions. The four main tracts of the indirect motor pathways are the vestibulospinal tract, the reticulospinal tract, the tectospinal tract, and the rubrospinal tract.
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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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In mechanics, when one observes a rigid body in rotational motion with constant angular acceleration, it is possible to establish equations for its rotational kinematics. This process resembles how linear kinematics are dealt with in simpler motion studies.
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In Vivo Wireless Optogenetic Control of Skilled Motor Behavior
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Acting together: Cortex and striatum specify movement kinematics.

Michelle Sánchez Rivera1, Ian Duguid2

  • 1Centre for Discovery Brain Sciences, Edinburgh Medical School: Biomedical Sciences, University of Edinburgh, Edinburgh EH8 9XD, UK.

Neuron
|February 20, 2025
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Summary

Striatal activity is crucial for defining movement patterns in mice. Researchers found that the motor cortex and striatum work together to shape flexible, goal-directed actions.

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Area of Science:

  • Neuroscience
  • Motor Control
  • Systems Neuroscience

Background:

  • Understanding the neural circuits underlying motor control is essential for treating movement disorders.
  • The striatum's role in action selection and execution is well-established, but its specific contribution to movement kinematics remains less clear.

Purpose of the Study:

  • To investigate the necessity of striatal activity for specifying movement kinematics.
  • To elucidate the roles of the motor cortex and striatum in shaping flexible, goal-directed actions.

Main Methods:

  • Development of a novel reach-to-pull behavioral task in mice.
  • Simultaneous electrophysiological recordings from the motor cortex and striatum.
  • In vivo manipulation of neural activity in these regions during task performance.

Main Results:

  • Striatal activity was found to be necessary for the precise specification of movement kinematics, including speed and trajectory.
  • The motor cortex and striatum exhibit coordinated activity patterns that predict movement parameters.
  • Disrupting striatal function impaired the ability to generate appropriate movement kinematics for the task.

Conclusions:

  • The striatum plays a critical role in specifying the detailed parameters of movement, not just in action selection.
  • Motor cortex and striatal circuits interact to enable the flexible control of goal-directed movements.
  • These findings offer new insights into the neural basis of motor learning and adaptation.