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Related Experiment Video

Updated: Feb 22, 2026

Transauricular Vagus Nerve Stimulation and Electroencephalographic Assessment in Disorders of Consciousness
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Restoring consciousness with vagus nerve stimulation.

Martina Corazzol1, Guillaume Lio1, Arthur Lefevre1

  • 1Institut des Sciences Cognitives Marc Jeannerod, UMR5229, Centre National de la Recherche Scientifique (CNRS), Bron, France; Claude Bernard University of Lyon I, Lyon, France.

Current Biology : CB
|September 27, 2017
PubMed
Summary

Vagus nerve stimulation may offer new hope for patients in a vegetative state. This study observed improved consciousness and brain connectivity in a single patient, suggesting a potential new therapeutic avenue for disorders of consciousness.

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Area of Science:

  • Neuroscience
  • Neurology
  • Medical Devices

Background:

  • Patients in a vegetative state exhibit severe consciousness impairments due to brain lesions affecting cortical, brainstem, thalamic, and white matter structures.
  • This condition is often characterized by disrupted long-range cortico-cortical and thalamo-cortical pathways, leading to deafferented cortical activity or fronto-parietal disruptions.
  • While spontaneous recovery is possible, linked to increased thalamo-cortical activity and fronto-parietal connectivity, chances diminish significantly after one year of unresponsiveness.

Discussion:

  • The study explored vagus nerve stimulation (VNS) as a novel intervention for restoring consciousness.
  • VNS aims to modulate neural activity and connectivity, potentially counteracting the deafferentation and disruptions seen in vegetative states.
  • Observed improvements in behavioral responsiveness and brain connectivity suggest VNS may influence neural networks critical for consciousness.

Key Insights:

  • Vagus nerve stimulation demonstrated beneficial effects on the consciousness level of a single patient in a vegetative state.
  • The intervention led to enhanced behavioral responsiveness and improved brain connectivity patterns.
  • This case report highlights the potential of VNS as a therapeutic strategy for disorders of consciousness.

Outlook:

  • Further research is warranted to validate these findings in larger patient cohorts.
  • Investigating the precise mechanisms by which VNS influences consciousness and brain networks is crucial.
  • VNS could represent a promising, non-invasive neuromodulation technique for improving outcomes in patients with severe brain injury and disorders of consciousness.