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Related Concept Videos

Propagation of Action Potentials01:23

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The propagation of an action potential refers to the process by which a nerve impulse, or "action potential," travels along a neuron.
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Neurons communicate by firing action potentials—the electrochemical signal that is propagated along the axon. The signal results in the release of neurotransmitters at axon terminals, thereby transmitting information to the nervous system. An action potential is a specific "all-or-none" change in membrane potential that results in a rapid spike in voltage.
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Large-scale spatiotemporal spike patterning consistent with wave propagation in motor cortex.

Kazutaka Takahashi1, Sanggyun Kim2, Todd P Coleman2

  • 1Department of Organismal Biology and Anatomy, University of Chicago, 1025 E 57th Street Culver Room 206, Chicago, Illinois 60637, USA.

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|May 22, 2015
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Summary
This summary is machine-generated.

Motor cortex neurons exhibit coordinated spiking patterns that mirror wave propagation in brain activity. This spatial organization of neural activity carries task-relevant information, suggesting a general principle for cortical function.

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Area of Science:

  • Neuroscience
  • Computational Neuroscience
  • Systems Neuroscience

Background:

  • Cortical activity propagates as waves, but the organization of individual neuron spiking remains unclear.
  • The spatial arrangement of functionally connected neurons on the cortical surface is often overlooked.

Purpose of the Study:

  • To investigate if individual neuron spiking activity is spatially organized in motor cortex.
  • To determine if this spatial organization relates to functional network properties and task performance.

Main Methods:

  • Functional network analysis applied to spiking activity of motor cortical neurons in non-human primates.
  • Comparison of neuron spiking coordination with local field potential (LFP) beta band wave propagation.

Main Results:

  • A subset of motor cortical neurons showed spiking coordination aligned with LFP beta band wave propagation.
  • Sequential spiking between neuron pairs contained task-relevant information, particularly when neurons were spatially aligned along the wave axis.

Conclusions:

  • Spiking activity in motor cortex exhibits spatial anisotropy, mirroring wave propagation.
  • This spatial patterning of neural communication may reflect underlying cortical organization and be a general feature across cortical areas.