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Related Concept Videos

Hierarchy of Motor Control01:18

Hierarchy of Motor Control

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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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Indirect Motor Pathways01:22

Indirect Motor Pathways

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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.
The vestibulospinal tract originates in the vestibular nuclei of the brainstem. The vestibular system detects changes in...
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Muscle Coordination and Action01:24

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Muscle coordination is a complex and finely tuned process essential for smooth and purposeful movements like flexion, extension, adduction, abduction, and rotation. The human body orchestrates the actions of various muscles working in concert, each with a specific role. Four functional types describe how muscles work together: agonist, antagonist, synergist, and fixator.
Agonists
Agonist muscles, often called prime movers, are the primary muscles responsible for producing a specific movement....
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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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Direct Motor Pathways01:11

Direct Motor Pathways

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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.
The corticospinal tract is responsible for the voluntary movement of the limbs and trunk. It originates in the cerebral cortex of the brain and descends through the cerebrum's internal capsule and...
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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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Related Experiment Video

Updated: Dec 6, 2025

Methods to Explore the Influence of Top-down Visual Processes on Motor Behavior
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Methods to Explore the Influence of Top-down Visual Processes on Motor Behavior

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From motor planning to execution: a sensorimotor loop perspective.

Emilio Bizzi1, Robert Ajemian1

  • 1McGovern Institute for Brain Research and Department of Brain and Cognitive Science, Massachusetts Institute of Technology, Cambridge, Massachusetts.

Journal of Neurophysiology
|October 14, 2020
PubMed
Summary
This summary is machine-generated.

Translating thought into action involves complex supraspinal control of spinal synergies. Understanding redundant sensorimotor loops is key to deciphering motor control.

Keywords:
basal gangliacompositionalitymodularitysensorimotor loopsynergy

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Related Experiment Videos

Last Updated: Dec 6, 2025

Methods to Explore the Influence of Top-down Visual Processes on Motor Behavior
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Area of Science:

  • Motor Systems Neuroscience
  • Neurotechnology

Background:

  • Established knowledge in biomechanics and spinal cord organization into muscle recruitment modules (spinal synergies).
  • Limited understanding of how the supraspinal system orchestrates these synergies for effective movement control.

Purpose of the Study:

  • To explore the challenges in understanding supraspinal control of movement.
  • To propose a framework for systems-level understanding of motor control through sensorimotor loops.

Main Methods:

  • Conceptual analysis of sensorimotor loops, convergence, and redundancy.
  • Discussion of the utility of advanced neurotechnology like optogenetics.

Main Results:

  • Supraspinal control is complex due to convergent and redundant sensorimotor loops.
  • Simple correlation analyses may yield inconsistent results in motor control research.

Conclusions:

  • A sensorimotor loop perspective offers a better systems-level understanding of motor control.
  • Neurotechnology, including optogenetics, is promising for investigating motor control at the loop level.