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Related Concept Videos

Propagation of Action Potentials01:23

Propagation of Action Potentials

The propagation of an action potential refers to the process by which a nerve impulse, or "action potential," travels along a neuron.
Neurons (nerve cells) have a resting membrane potential, with a slightly negative charge inside compared to outside. This is maintained by ion channels, such as sodium (Na+) and potassium (K+) channels, which control the flow of ions. When a stimulus, like a touch or a signal from another neuron, triggers the neuron, sodium channels open, allowing sodium ions to...
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Functions of the Nervous System01:18

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The somatosensory cortex in the parietal lobes is crucial for interpreting sensory data such as touch, temperature, and proprioception. The somatosensory cortex, situated in the parietal lobes, plays a vital role in interpreting sensory information like touch, temperature, and proprioception—awareness of body position. This specialized brain region features an organized structure wherein neurons at the top primarily process sensations originating from the lower body. In contrast, those at the...

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Stimulating the Lip Motor Cortex with Transcranial Magnetic Stimulation
12:09

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Published on: June 14, 2014

Propagating waves in human motor cortex.

Kazutaka Takahashi1, Maryam Saleh, Richard D Penn

  • 1Department of Organismal Biology and Anatomy, University of Chicago Chicago, IL, USA.

Frontiers in Human Neuroscience
|June 2, 2011
PubMed
Summary
This summary is machine-generated.

Traveling beta waves in the human motor cortex (MI) were observed, mirroring patterns found in non-human primates. These brain waves exhibit consistent directional propagation and speed, suggesting a fundamental neural organization.

Keywords:
human subjectlocal field potentialsmotor cortexnon-human primatepropagating waves

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Last Updated: Jun 1, 2026

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Published on: December 31, 2013

Area of Science:

  • Neuroscience
  • Motor Control
  • Computational Neuroscience

Background:

  • Previous research in non-human primates identified traveling beta waves (15-30 Hz) in the primary motor cortex (MI).
  • These waves display consistent directional propagation and speed across different tasks.
  • It remained unknown if similar cortical waves exist in the human motor cortex.

Purpose of the Study:

  • To investigate the presence and properties of traveling beta waves in the human primary motor cortex (MI).
  • To compare human beta wave characteristics with those previously observed in non-human primates.
  • To explore the functional implications of these traveling waves in motor control.

Main Methods:

  • Electrophysiological recordings of local field potentials (LFPs) from the primary motor cortex (MI) of a tetraplegic human patient.
  • Analysis of beta oscillations (15-30 Hz) during a chin-controlled center-out task and rest.
  • Comparison of wave propagation direction, speed, and occurrence patterns with data from non-human primates.

Main Results:

  • Traveling beta waves with two dominant, opposing propagation directions were identified in the human MI.
  • Wave propagation speed in humans ranged from 10 to 35 cm/s, consistent with non-human primate findings.
  • Beta waves were sustained and present during both task performance and rest, independent of increased beta power.

Conclusions:

  • Traveling beta waves in the primary motor cortex (MI) are a general phenomenon observed in both humans and non-human primates.
  • The directional alignment of these waves in humans corresponds to the proximal-distal gradient of MI somatotopy.
  • The consistent spatiotemporal patterns suggest a hardwired cortical organization underlying motor control.