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Related Concept Videos

Working Memory01:24

Working Memory

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Working memory refers to a combination of components, including short-term memory and attention, that allow an individual to hold information temporarily as we perform cognitive tasks. It is an essential cognitive function that enables the execution of complex tasks such as problem-solving, comprehension, and reasoning. Unlike short-term memory, which simply involves the storage of information for a brief period, working memory involves the active manipulation and processing of this...
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Direct Motor Pathways01:11

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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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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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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
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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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Motor Units01:13

Motor Units

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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.
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Related Experiment Video

Updated: Jul 5, 2025

Measuring and Manipulating Functionally Specific Neural Pathways in the Human Motor System with Transcranial Magnetic Stimulation
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Dissociable Codes in Motor Working Memory.

Hanna Hillman1, Tabea Botthof1, Alexander D Forrence1

  • 1Department of Psychology, Yale University.

Psychological Science
|January 18, 2024
PubMed
Summary
This summary is machine-generated.

Motor working memory (MWM) stores recent movement details. A new model reveals MWM uses both abstract and effector-specific codes, with the latter vulnerable to interference, impacting skill learning.

Keywords:
actionexecutive functionmotoropen datavisuospatialworking memory

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Area of Science:

  • Cognitive Neuroscience
  • Motor Control
  • Human Movement Science

Background:

  • Working memory is extensively studied in sensory domains, but less so for motor information.
  • Motor working memory (MWM) is crucial for immediate behavioral control and skill acquisition.

Purpose of the Study:

  • To investigate the nature of motor working memory (MWM).
  • To examine how MWM is affected by cognitive load, delays, and interference.

Main Methods:

  • Participants performed tasks requiring encoding and recall of reaching movements.
  • Three experiments manipulated cognitive load, delay intervals, and interfering movements.

Main Results:

  • MWM involves an abstract code transferable across effectors and an effector-specific code.
  • Interfering movements, even irrelevant ones, impaired the effector-specific code.
  • Visuospatial working memory load did not affect MWM codes.

Conclusions:

  • The findings support a dual-code model of MWM.
  • MWM shares computational principles with other working memory systems.
  • Understanding MWM is key for behavioral control and motor learning research.