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Related Concept Videos

Lateralization01:28

Lateralization

Brain lateralization refers to the division of mental processes and functions between the two hemispheres of the brain, a phenomenon that optimizes neural efficiency and underpins complex abilities in humans. This specialization allows each hemisphere to perform tasks where it has a comparative advantage, facilitating more refined cognitive capabilities across different domains.

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Evaluation of Hemisphere Lateralization with Bilateral Local Field Potential Recording in Secondary Motor Cortex of Mice
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Ictal "hemiballic-like" movement: lateralizing and localizing value.

Frédérique Fluchère1, Aileen McGonigal, Nathalie Villeneuve

  • 1Clinical Neurophysiology and Epileptology Department, Timone Hospital, Assistance Publique Hôpitaux de Marseille, Marseille, France.

Epilepsia
|December 24, 2011
PubMed
Summary
This summary is machine-generated.

This study reveals that hemiballic-like movements during partial seizures help pinpoint seizure origins. These movements are ipsilateral to the seizure onset zone, aiding in epilepsy localization.

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Area of Science:

  • Neurology
  • Epileptology
  • Clinical Neurophysiology

Background:

  • Partial seizures can present with hyperkinetic features.
  • Understanding the semiology of seizures is crucial for accurate localization.
  • Hemiballic-like movements are uncommon ictal phenomena.

Purpose of the Study:

  • To determine the lateralizing and localizing value of "hemiballic-like" ictal movements in partial seizures.
  • To investigate the relationship between these movements and the seizure onset zone.
  • To identify the brain regions associated with these specific ictal behaviors.

Main Methods:

  • Analysis of 20 patients with ictal hyperkinetic features using stereotactic-EEG (SEEG).
  • Detailed observation and recording of "hemiballic-like" ictal movements.
  • Correlation of movement semiology with ictal-onset zone determined by SEEG and noninvasive recordings.

Main Results:

  • "Hemiballic-like" movements were observed in 4 out of 20 patients.
  • The hemiballic movement was ipsilateral to the seizure onset zone.
  • Contralateral ictal dystonia was associated with the hemiballic movement.
  • Seizure origin was identified in the inferior parietal lobule/parietal operculum (3 patients) or inferior prefrontal cortex (1 patient).

Conclusions:

  • "Hemiballic-like" ictal movements have significant lateralizing value in partial seizures.
  • These movements can help localize seizure origins to specific cortical regions, particularly the parietal lobe and prefrontal cortex.
  • The association with contralateral dystonia provides further localization clues.