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Related Concept Videos

Motor and Sensory Areas of the Cortex01:14

Motor and Sensory Areas of the Cortex

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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 motor areas located in the frontal lobe are central to controlling voluntary movements. This region is further subdivided into the primary motor cortex and the premotor cortex....
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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 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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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 hierarchy of motor control refers to the different levels of organization and processing involved in controlling movement in the body. These levels range from higher cortical areas involved in planning and decision-making to lower spinal cord reflexes that respond automatically to external stimuli.
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The brainstem, located inferior to the brain and superior to the spinal cord, serves as a bridge between the cerebrum and the spinal cord. It plays a vital role in relaying information and controlling critical life functions. It comprises three primary regions: the midbrain, pons, and medulla oblongata.
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Related Experiment Video

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Study Motor Skill Learning by Single-pellet Reaching Tasks in Mice
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Motor cortex is required for learning but not for executing a motor skill.

Risa Kawai1, Timothy Markman2, Rajesh Poddar3

  • 1Center for Brain Science, Harvard University, Cambridge, MA 02138, USA; Program in Biophysics, Harvard University, Cambridge, MA 02138, USA.

Neuron
|April 21, 2015
PubMed
Summary

The motor cortex is not essential for executing learned motor skills but plays a crucial role in "tutoring" subcortical circuits during motor skill acquisition.

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Area of Science:

  • Neuroscience
  • Motor Control
  • Learning and Memory

Background:

  • The motor cortex is traditionally linked to motor skill acquisition and execution.
  • Its precise role is debated due to conflation with dexterous control and sequence learning.

Purpose of the Study:

  • To differentiate the motor cortex's role in motor skill execution versus learning.
  • To investigate the contribution of the motor cortex to acquiring precise motor sequences.

Main Methods:

  • Developed a novel motor task for rats requiring spatiotemporally precise movements without dexterity.
  • Administered motor cortex lesions before and after skill acquisition.

Main Results:

  • Rats with motor cortex lesions after training could execute learned skills without deficits.
  • Rats with motor cortex lesions before training were unable to acquire the motor task.
  • Subcortical circuits demonstrated a capacity to execute learned motor skills.

Conclusions:

  • The motor cortex is critical for motor skill learning (tutoring subcortical circuits).
  • Subcortical motor circuits are capable of executing learned motor skills independently.
  • Dissociated the roles of motor cortex in motor learning and execution.