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Related Concept Videos

Direct Motor Pathways01:11

Direct Motor Pathways

1.9K
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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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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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.
Motor Areas
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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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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Brainstem01:19

Brainstem

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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.
The Midbrain
The midbrain is located beneath the diencephalon and connects the cerebrum with the lower parts of the brain. The cerebral peduncles are prominent midbrain structures that house the...
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Motor Units01:13

Motor Units

3.9K
The motor unit is a fundamental component of the neuromuscular system and plays a crucial role in coordinating muscle contractions. It consists of a somatic motor neuron, which connects and controls multiple skeletal muscle fibers, forming a single functional segment. The axon of the motor neuron branches out and establishes synaptic connections known as neuromuscular junctions with individual muscle fibers within the motor unit.
Motor units come in different sizes, with smaller units...
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Related Experiment Video

Updated: Jun 20, 2025

In Vivo Wireless Optogenetic Control of Skilled Motor Behavior
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Exploring the Consistent Roles of Motor Areas Across Voluntary Movement and Locomotion.

Nicolas Fortier-Lebel1, Toshi Nakajima2

  • 1Département de neurosciences, Département de médecine, Centre interdisciplinaire de recherche sur le cerveau et l'apprentissage, Groupe de recherche sur la signalisation neurale et la circuiterie, Université de Montréal, Montréal, Canada.

The Neuroscientist : a Review Journal Bringing Neurobiology, Neurology and Psychiatry
|July 23, 2024
PubMed
Summary

Cortical motor areas control voluntary movement and gait. Research in cats reveals similar neural mechanisms for locomotion as observed in primates for discrete movements, offering insights into human motor control.

Keywords:
catgait modificationlocomotionmonkeymotor cortexmotor sequencepremotor areavoluntary movement

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Area of Science:

  • Neuroscience
  • Motor Control
  • Comparative Neurology

Background:

  • Voluntary control of discrete movements and gait involves multiple cortical motor areas.
  • Key areas include primary, supplementary, presupplementary motor areas, and the dorsal premotor area.

Purpose of the Study:

  • To elucidate movement control mechanisms in primate and cat motor areas.
  • To investigate how area-specific control contributes to complex motor sequences and locomotion.

Main Methods:

  • Analysis of experimental findings in nonhuman primates, clinical reports in humans.
  • Recording single-neuron activity in monkeys performing motor sequences.
  • Exploring analogous motor areas in cats based on topology, connections, and activity.

Main Results:

  • Primate motor areas exhibit distinct control mechanisms for discrete movements.
  • Cat motor areas show functional similarities to primate areas during locomotion.
  • Premotor areas in cats demonstrate a unique contribution to locomotion control.

Conclusions:

  • Discrete movement and gait modification share similar control mechanisms.
  • Cat model provides valuable insights into primate and human locomotion control.
  • Comparative neurology highlights conserved neural strategies for motor control.