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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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Root-Locus Method01:19

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A cruise control system in a car is designed to maintain a specified speed automatically by adjusting the gas pedal. The system continuously measures the vehicle's speed and makes fine adjustments to the pedal to achieve this goal. The root locus method is particularly useful for understanding how the cruise control system's behavior changes under varying conditions, such as when the car goes uphill, downhill, or faces strong wind resistance.
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Indirect Motor Pathways01:22

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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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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.
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Time-Domain Interpretation of PD Control01:07

Time-Domain Interpretation of PD Control

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Proportional-Derivative (PD) control is a widely used control method in various engineering systems to enhance stability and performance. In a system with only proportional control, common issues include high maximum overshoot and oscillation, observed in both the error signal and its rate of change. This behavior can be divided into three distinct phases: initial overshoot, subsequent undershoot, and gradual stabilization.
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Spinal Cord: Cross-sectional Anatomy01:16

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The cross-sectional anatomy of the spinal cord offers a detailed view of its complex structure and function within the central nervous system. At the core of the spinal cord lies the gray matter, characterized by its butterfly or "H"-shaped appearance in cross-section. This central region is enveloped by white matter, with the overall structure divided into symmetrical halves by the dorsal median sulcus and the ventral median fissure.
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Related Experiment Video

Updated: Jul 23, 2025

Methods to Explore the Influence of Top-down Visual Processes on Motor Behavior
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Locomotor pattern generation and descending control: a historical perspective.

Réjean Dubuc1,2, Jean-Marie Cabelguen3, Dimitri Ryczko4,5,6,7

  • 1Groupe de Recherche en Activité Physique Adaptée, Département des Sciences de l'Activité Physique, Université du Québec à Montréal, Montreal, Quebec, Canada.

Journal of Neurophysiology
|July 19, 2023
PubMed
Summary

This review explores the neural control of vertebrate locomotion, focusing on spinal central pattern generators and descending brainstem inputs. Understanding these mechanisms is key to comprehending movement control.

Keywords:
brain stemcentral pattern generatorlocomotionspinal cord

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Last Updated: Jul 23, 2025

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Area of Science:

  • Neuroscience
  • Comparative Physiology
  • Biomechanics

Background:

  • Locomotion control involves intricate nervous, musculoskeletal, and environmental interactions.
  • Vertebrate locomotion relies on spinal neural networks called central pattern generators.
  • Brainstem and sensory systems modulate these spinal networks.

Purpose of the Study:

  • To provide a comparative and historical overview of vertebrate locomotion control.
  • To emphasize the roles of spinal mechanisms and descending control.
  • To synthesize current understanding of neural control of movement.

Main Methods:

  • Literature review and historical analysis.
  • Comparative study across vertebrate species.
  • Focus on neural network function and control pathways.

Main Results:

  • Central pattern generators in the spinal cord are fundamental for rhythmic locomotion.
  • Descending brainstem pathways initiate, regulate speed, and cease locomotion.
  • Sensory feedback refines locomotor output based on environmental context.

Conclusions:

  • Vertebrate locomotion is orchestrated by a hierarchical neural system.
  • Spinal and descending controls are critical for adaptable and robust movement.
  • Further research can elucidate complex neural interactions in locomotion.