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Altered hemispheric symmetry found in left-sided mesial temporal lobe epilepsy with hippocampal sclerosis (MTLE/HS)

Jingjing Lu1, Wenjing Li, Huiguang He

  • 1Department of Radiology, Peking Union Medical College Hospital, No. 1 Shuai Fu Yuan, Wang Fu Jing Avenue, Dong Cheng District, Beijing 100730, China. cjr.lujingjing@vip.163.com

Magnetic Resonance Imaging
|August 29, 2012
PubMed
Abstract

Insights

Mesial temporal lobe epilepsy with unilateral hippocampus sclerosis (MTLE/HS) shows altered brain asymmetry, particularly in left-sided cases. Optimized voxel-based morphometry (VBM) can detect these hemispheric differences.

Area of Science:

  • Neuroimaging
  • Epilepsy Research
  • Brain Anatomy

Background:

  • Mesial temporal lobe epilepsy with unilateral hippocampus sclerosis (MTLE/HS) is a common epilepsy syndrome.
  • Hemispheric asymmetry is a known feature in some neurological conditions.
  • Understanding asymmetry in MTLE/HS is crucial for diagnosis and treatment.

Purpose of the Study:

  • To investigate altered hemispheric asymmetry in gray matter (GM) and white matter (WM) volumes in patients with MTLE/HS.
  • To compare asymmetry patterns between left-sided MTLE/HS, right-sided MTLE/HS, and healthy controls.
  • To evaluate the utility of optimized voxel-based morphometry (VBM) in detecting these asymmetries.

Main Methods:

  • Magnetic resonance imaging (MRI) was used to acquire brain scans.
  • Optimized voxel-based morphometry (VBM) was employed to analyze regional GM and WM volumes.
  • Three groups were studied: 13 left-sided MTLE/HS patients, 10 right-sided MTLE/HS patients, and 21 healthy controls.

Main Results:

  • Left-sided MTLE/HS patients exhibited significant GM asymmetries (L
  • Significant WM asymmetry (L
  • No significant GM or WM asymmetry differences were found between right-sided MTLE/HS patients and healthy controls.

Conclusions:

  • Hemispheric asymmetry in MTLE/HS requires distinct approaches for left- and right-sided conditions.
  • VBM is a valuable tool for detecting hemispheric asymmetries in epilepsy.
  • This study highlights the potential of VBM in understanding brain lateralization in neurological disorders.

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