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Title: Thalamic atrophy in childhood absence epilepsy.
Austin Authors: Chan, Chow Huat Patrick;Briellmann, Regula S;Pell, Gaby S;Scheffer, Ingrid E ;Abbott, David F ;Jackson, Graeme D 
Affiliation: Brain Research Institute, Neurosciences Building, Austin Health, Heidelberg West, Victoria 3081, Australia
Issue Date: 1-Feb-2006
Publication information: Epilepsia; 47(2): 399-405
Abstract: Patients with childhood absence epilepsy (CAE) have normal clinical magnetic resonance imaging (MRI) studies. The presence of abnormalities in corticothalamic networks has been suggested to be the functional basis of absence seizure generation. We assessed whether structural grey and white matter volume changes of these areas occurred in patients with absence seizures by using optimized voxel-based morphometry (VBM).We recruited 13 patients with a clinical and EEG diagnosis of CAE (mean age at examination, 17 +/- 8 years) and compared them with a consecutive series of 109 controls (mean age, 29 +/- 9 years). The 3 tesla MRI examination included a 3D T(1)-weighted sequence, which was analyzed with an optimized VBM protocol using the SPM2 package. The threshold was set at p < 0.05, corrected for multiple comparisons.Compared with controls, CAE patients showed areas of grey matter decrease in both thalami and in the subcallosal gyrus. White matter decrease was found in the extranuclear subcortical area and in the white matter of the basal forebrain. Grey and white matter increase was restricted to small clusters of cortical and subcortical areas.Evidence exists of subcortical grey and white matter volume reduction in CAE patients. Bilateral thalamic atrophy may be either a result of damage from seizures (as in hippocampal sclerosis) or a reflection of a primary underlying pathology as the cause of absence seizures.
Gov't Doc #: 16499767
DOI: 10.1111/j.1528-1167.2006.00435.x
Journal: Epilepsia
Type: Journal Article
Subjects: Adolescent
Brain Mapping
Cerebral Cortex.pathology
Dominance, Cerebral
Epilepsy, Absence.pathology
Image Interpretation, Computer-Assisted
Magnetic Resonance Imaging.statistics & numerical data
Temporal Lobe.pathology
Appears in Collections:Journal articles

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