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Related Concept Videos

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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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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Related Experiment Video

Updated: Aug 9, 2025

Automated Visual Cognitive Tasks for Recording Neural Activity Using a Floor Projection Maze
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Neural activity during monkey vehicular wayfinding.

William K Page1, David W Sulon2, Charles J Duffy3

  • 1Dept. of Neurology, University of Rochester Medical Ctr., Rochester, NY 14642, USA.

Journal of the Neurological Sciences
|February 24, 2023
PubMed
Summary
This summary is machine-generated.

This study reveals how the hippocampus (HPC) and medial superior temporal (MST) cortex coordinate during navigation. Neural activity patterns in these brain regions help map locations and guide goal-directed movement, with specific neurons activating based on path deviation.

Keywords:
CortexNavigationNeurophysiologyWayfindinghippocampus

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Animal Behavior

Background:

  • Navigation is crucial for goal-directed movement.
  • Understanding the neural mechanisms of spatial navigation and path planning is a key research area.
  • The hippocampus (HPC) and medial superior temporal (MST) cortex are implicated in spatial processing.

Purpose of the Study:

  • To investigate the simultaneous neural activity in the HPC and MST cortex during a navigation task.
  • To determine how neural signals in these regions contribute to mapping environments and guiding movement towards a goal.
  • To explore the dynamic interactions between HPC and MST during different stages of wayfinding.

Main Methods:

  • A monkey was trained to steer a motorized cart between start and goal locations in a controlled environment.
  • Simultaneous neural recordings (Local Field Potentials and Single Neuron Responses) were conducted in the HPC and MST cortex.
  • Granger causality analysis was used to infer directional interactions between neural populations.

Main Results:

  • Specific frequency bands (15-30 Hz) of LFPs highlighted room locations, while higher frequencies (30-100 Hz) supported a unified map of start and goal locations.
  • Single neuron responses did not form distinct spatial maps but showed a continuum related to path deviation (on-path vs. off-path).
  • HPC firing preceded MST firing during cueing (mediated by off-path neurons), while MST preceded HPC firing during steering (mediated by on-path neurons).

Conclusions:

  • The HPC and MST cortex exhibit distinct but interacting neural dynamics during navigation.
  • Neural activity in these regions contributes to both environmental mapping and dynamic path adjustments.
  • The interplay between on-path and off-path neurons in HPC and MST is critical for successful wayfinding.