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Related Experiment Videos

Bereitschaftspotential in tic disorders: a preliminary observation.

H S Duggal1, S Haque Nizamie

  • 1Department of Psychiatry, Central Institute of Psychiatry, Kanke, Ranchi - 834006, India.

Neurology India
|February 11, 2003
PubMed
Summary

Tic disorders involve sensory phenomena like premonitory urges. This study suggests tics may be quasi-volitional, with brain activity (Bereitschaftspotential) potentially marking these urges.

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Area of Science:

  • Neuroscience
  • Neurology
  • Psychiatry

Background:

  • Sensory phenomena, such as premonitory urges, are recognized in tic disorders like Tourette's syndrome.
  • Existing research substantiating these sensory phenomena is limited.

Purpose of the Study:

  • To investigate the premonitory urge in patients with tic disorders.
  • To assess the neurophysiological correlates of premonitory urge using Bereitschaftspotential.

Main Methods:

  • Preliminary report involving three patients diagnosed with tic disorders.
  • Electroencephalography (EEG) was used to measure Bereitschaftspotential, a marker of motor preparation.
  • Observed Bereitschaftspotential in relation to tic occurrence.

Main Results:

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  • Bereitschaftspotential was detected in all three patients prior to the onset of tics.
  • The findings suggest that tics may not be purely involuntary but possess a quasi-volitional component.
  • Bereitschaftspotential is proposed as a potential neurophysiological marker for premonitory urge in tic disorders.

Conclusions:

  • Tics in tic disorders might be quasi-volitional rather than entirely involuntary.
  • Bereitschaftspotential could serve as a neurophysiological indicator of the premonitory urge.
  • Further research into the voluntary aspects of tics is warranted.