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Hierarchy of Motor Control

Hierarchy of Motor Control

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.

Motor Units

Motor Units

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...

Motor Units

Motor Units

A motor unit consists of two main components: a single efferent motor neuron (i.e., a neuron that carries impulses away from the central nervous system) and all of the muscle fibers it innervates. The motor neuron may innervate multiple muscle fibers, which are single cells, but only one motor neuron innervates a single muscle fiber.

Motor Unit Stimulation

Motor Unit Stimulation

When the neuron of a motor unit fires an action potential, it triggers a series of events, leading to a twitch contraction in the muscle fibers. The process of excitation-contraction coupling is crucial in relaying the action potential to the muscle fibers.
The latent period of contraction marks the onset of excitation-contraction coupling, when the action potential propagates across the sarcolemma, preparing the muscle fibers for contraction. As the fibers enter the contraction phase, the...

Direct Motor Pathways

Direct Motor Pathways

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 the...

Indirect Motor Pathways

Indirect Motor Pathways

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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Related Experiment Video

Updated: Jun 12, 2026

Investigating Motor Skill Learning Processes with a Robotic Manipulandum

Investigating Motor Skill Learning Processes with a Robotic Manipulandum

Published on: February 12, 2017

Motor learning.

Daniel M Wolpert¹, J Randall Flanagan

¹Department of Engineering, University of Cambridge, Trumpington Street, Cambridge CB2 1PZ, UK. wolpert@eng.cam.ac.uk

Current Biology : CB

|June 15, 2010

Summary

This summary is machine-generated.

Learning a motor skill like tennis involves four key components: sensory information processing, understanding task features, motor control mechanisms, and higher-level strategic decision-making for effective skill acquisition.

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Related Experiment Videos

Last Updated: Jun 12, 2026

Investigating Motor Skill Learning Processes with a Robotic Manipulandum

Investigating Motor Skill Learning Processes with a Robotic Manipulandum

Published on: February 12, 2017

Study Motor Skill Learning by Single-pellet Reaching Tasks in Mice

Study Motor Skill Learning by Single-pellet Reaching Tasks in Mice

Published on: March 4, 2014

The "Motor" in Implicit Motor Sequence Learning: A Foot-stepping Serial Reaction Time Task

The "Motor" in Implicit Motor Sequence Learning: A Foot-stepping Serial Reaction Time Task

Published on: May 3, 2018

Area of Science:

Motor control and learning science
Cognitive neuroscience of skill acquisition

Background:

Motor skill acquisition often feels seamless, but involves complex, interacting components.
Understanding these components is crucial for optimizing learning processes.

Purpose of the Study:

To dissect the multifaceted nature of motor skill learning.
To elucidate the distinct yet interacting components involved in acquiring complex motor skills, using tennis as a model.

Main Methods:

Conceptual framework outlining four primary groups of components in motor learning.
Analysis of sensory information gathering, task feature learning, motor command generation, and strategic decision-making.

Main Results:

Skilled performance integrates efficient sensory processing and task-specific knowledge.
Effective motor learning requires predictive/reactive control and adaptive compliance.
Higher-level skills involve anticipation, strategy, and shot selection.

Conclusions:

Motor skill learning is a composite process, not a unitary one.
Each component—sensory, knowledge, control, and strategy—is vital for expert performance.