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Related Concept Videos

Brain Imaging01:14

Brain Imaging

Brain imaging technologies provide critical insights into both the structure and function of the human brain, enabling medical professionals and researchers to diagnose, study, and treat neurological disorders or psychiatric disorders more effectively.
These technologies include computerized axial tomography (CAT or CT scans), positron-emission tomography (PET scans),  magnetic resonance imaging (MRI),  functional magnetic resonance imaging (fMRI), and Transcranial Magnetic Stimulation (TMS).
Neuroplasticity01:01

Neuroplasticity

Neuroplasticity reflects the brain's remarkable capacity to adapt and evolve, responding dynamically to learning, experiences, or injury by reorganizing its neural circuitry. This reorganization involves creating new neural connections and refining old ones through a series of biological processes that contribute to the brain's lifelong development and adaptability.

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Related Experiment Video

Updated: May 31, 2026

Measuring and Manipulating Functionally Specific Neural Pathways in the Human Motor System with Transcranial Magnetic Stimulation
09:52

Measuring and Manipulating Functionally Specific Neural Pathways in the Human Motor System with Transcranial Magnetic Stimulation

Published on: February 23, 2020

From cranium to brain: Rethinking tES neuromodulation through the peripheral pathways.

Alireza Majdi1, Liyi Chen1, Sven Vanneste2

  • 1Research Group Experimental Oto-rhino-laryngology, Department of Neuroscience, Leuven Brain Institute, KU Leuven, Leuven, 3000, Belgium.

Brain Stimulation
|May 28, 2026
PubMed
Summary
This summary is machine-generated.

Transcranial electrical stimulation (tES) affects the brain through both direct cortical stimulation and by activating cranial nerves. This dual-route model explains tES effects and suggests improved control methods for research.

Keywords:
Dual-route frameworkPeripheral/cranial nerve co-stimulationTranscranial electrical stimulationTranscranial routeTranscutaneous route

More Related Videos

Non-Invasive Electrical Brain Stimulation Montages for Modulation of Human Motor Function
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Non-Invasive Electrical Brain Stimulation Montages for Modulation of Human Motor Function

Published on: February 4, 2016

Perspectives on Neuroscience
26:41

Perspectives on Neuroscience

Published on: July 31, 2007

Related Experiment Videos

Last Updated: May 31, 2026

Measuring and Manipulating Functionally Specific Neural Pathways in the Human Motor System with Transcranial Magnetic Stimulation
09:52

Measuring and Manipulating Functionally Specific Neural Pathways in the Human Motor System with Transcranial Magnetic Stimulation

Published on: February 23, 2020

Non-Invasive Electrical Brain Stimulation Montages for Modulation of Human Motor Function
07:47

Non-Invasive Electrical Brain Stimulation Montages for Modulation of Human Motor Function

Published on: February 4, 2016

Perspectives on Neuroscience
26:41

Perspectives on Neuroscience

Published on: July 31, 2007

Area of Science:

  • Neuroscience
  • Neuromodulation

Background:

  • Transcranial electrical stimulation (tES) is typically viewed as a direct cortical intervention.
  • Evidence suggests tES may have broader effects beyond direct cortical stimulation.

Purpose of the Study:

  • To propose an integrated dual-route framework for understanding tES mechanisms.
  • To explain inconsistencies in tES research and suggest improved methodologies.

Main Methods:

  • Synthesis of human and animal evidence.
  • Analysis of tES effects on cortical and peripheral nerve pathways.

Main Results:

  • tES co-stimulates cranial and cervical nerves, particularly the trigeminal and greater occipital nerves.
  • These nerves engage deep brainstem neuromodulatory nuclei (locus coeruleus, raphe).
  • Transcutaneous pathways contribute significantly to tES effects, alongside direct cortical polarization.

Conclusions:

  • An integrated dual-route model (cortical + transcutaneous neuromodulation) better explains tES outcomes.
  • This model addresses spatial specificity paradoxes, low-intensity effects, and sham inconsistencies.
  • Revised control conditions are needed to account for both direct cortical and transcutaneous stimulation routes for enhanced therapeutic efficacy.