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Related Concept Videos

Hierarchy of Motor Control01:18

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.
Sequence Networks of Rotating Machines01:24

Sequence Networks of Rotating Machines

A Y-connected synchronous generator, grounded through a neutral impedance, is designed to produce balanced internal phase voltages with only positive-sequence components. The generator's sequence networks include a source voltage that is exclusively in the positive-sequence network. The sequence components of line-to-ground voltages at the generator terminals illustrate this configuration.
Zero-sequence current induces a voltage drop across the generator's neutral impedance and other...
Timing and Consequences on Behavior01:08

Timing and Consequences on Behavior

In operant conditioning, the timing of reinforcement is crucial. For animals like rats and cats, immediate reinforcement (within a few seconds) is much more effective than delayed reinforcement. For example, a food reward for a rat needs to follow within 30 seconds of pressing a bar to be effective. 
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Motor Unit Stimulation01:20

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.
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Indirect Motor Pathways01:22

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.
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Direct Motor Pathways01:11

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.
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Related Experiment Video

Updated: May 20, 2026

The "Motor" in Implicit Motor Sequence Learning: A Foot-stepping Serial Reaction Time Task
10:39

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

Published on: May 3, 2018

A generative model for measuring latent timing structure in motor sequences.

Christopher M Glaze1, Todd W Troyer

  • 1Department of Biology, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America. cglaze@sas.upenn.edu

Plos One
|July 21, 2012
PubMed
Summary
This summary is machine-generated.

We developed a statistical model to dissect motor timing variability into global tempo, neural noise, and peripheral jitter. This model quantifies distinct timing components in action sequences, applicable to various systems.

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Last Updated: May 20, 2026

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Area of Science:

  • Neuroscience
  • Computational Biology
  • Behavioral Science

Background:

  • Motor variability arises from diverse neural and peripheral sources across timescales.
  • Understanding these sources is crucial for deciphering complex motor control.

Purpose of the Study:

  • To present a statistical model for quantifying distinct components of timing variability in action sequences.
  • To apply this model to analyze temporal structure in zebra finch song.

Main Methods:

  • Developed a statistical model to measure global tempo changes, independent timing noise, and timing jitter.
  • Applied maximum likelihood estimation for trial-to-trial factor assignment.
  • Validated the model with artificially generated data.

Main Results:

  • Zebra finch syllables exhibit roughly equal variability from global tempo, neural noise, and jitter.
  • Overall song length is primarily influenced by global tempo changes.
  • Global and independent variability scale with syllable length, unlike timing jitter.

Conclusions:

  • The model successfully separates distinct sources of timing variability in action sequences.
  • Findings are consistent with established models of sequence timing.
  • The framework offers broad applicability to neural and behavioral data analysis.