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Related Concept Videos

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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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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Neural Circuits01:25

Neural Circuits

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Neural circuits and neuronal pools are two of the main structures found in the nervous system. Neural circuits are networks of neurons that work together to carry out a specific task or process. They consist of interconnected neurons and glial cells, which provide structural and metabolic support.
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Hierarchy of Motor Control01:18

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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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Spinal Cord: Information Processing01:10

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The spinal cord is an integral hub for motor and sensory information that enables the brain to communicate with the peripheral nervous system (PNS). This communication consists of relaying sensory data and transmission of motor commands.
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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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Study Motor Skill Learning by Single-pellet Reaching Tasks in Mice
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Spinal circuits for motor learning.

Robert M Brownstone1, Tuan V Bui2, Nicolas Stifani3

  • 1Department of Surgery (Neurosurgery), Dalhousie University, Halifax, Nova Scotia, Canada B3H 4R2; Department of Medical Neuroscience, Dalhousie University, Halifax, Nova Scotia, Canada B3H 4R2.

Current Opinion in Neurobiology
|May 16, 2015
PubMed
Summary
This summary is machine-generated.

Spinal circuits can learn locomotion after spinal cord injury, suggesting motor learning extends beyond the cerebellum. Motoneurons may integrate sensory feedback and feedforward signals to enable this spinal motor learning.

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Related Experiment Videos

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Area of Science:

  • Neuroscience
  • Motor Control
  • Spinal Cord Injury Research

Background:

  • Motor learning research has primarily focused on the cerebellum.
  • Spinal circuits demonstrate plasticity, enabling locomotion recovery after spinal cord injury.
  • Somatosensory feedback is crucial, but intrinsic spinal circuits also contribute to motor learning.

Purpose of the Study:

  • To explore the role of spinal circuitry in motor learning beyond the cerebellum.
  • To investigate how spinal circuits adapt to produce locomotion post-injury.
  • To propose a model where motoneurons integrate feedback and feedforward information for motor learning.

Main Methods:

  • Review and conceptual synthesis of existing motor learning and spinal cord injury research.
  • Application of cerebellar motor learning principles to spinal circuitry.
  • Formulation of testable hypotheses regarding spinal cord organization for motor learning.

Main Results:

  • Spinal circuits possess inherent learning capabilities for motor tasks like locomotion.
  • Motoneurons are proposed as key integrators of somatosensory feedback and descending (feedforward) inputs.
  • This integration by motoneurons is hypothesized to be a critical mechanism for spinal motor learning.

Conclusions:

  • Motor learning is not exclusive to the cerebellum; spinal circuits play a significant role.
  • Understanding spinal motor learning mechanisms is crucial for rehabilitation after spinal cord injury.
  • Cerebellar principles can guide investigations into spinal cord plasticity and motor recovery.