Neurodevelopmental disruption in early-onset temporal lobe epilepsy: evidence from a voxel-based morphometry study |
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Authors: | Kaaden Sabine Quesada Carlos M Urbach Horst Koenig Roy Weber Bernd Schramm Johannes Rudinger Georg Helmstaedter Christoph |
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Affiliation: | a Department of Neurosurgery, University of Bonn, Bonn, Germany;b Department of Epileptology, University of Bonn, Bonn, Germany;c Department of Radiology and Neuroradiology, University of Bonn, Bonn, Germany;d Department of Psychology, University of Bonn, Bonn, Germany |
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Abstract: | Childhood onset of epilepsy has long been associated with an adverse impact on brain development and cognition. In this study it is proposed that earlier (vs later) onset of temporal lobe epilepsy (TLE) has a negative developmental impact on distant brain structures. One hundred ten patients with TLE were assigned to early (≤14 years, N=58) and late (>15 years, N=52) age at onset of epilepsy groups. Voxel-based morphometry revealed onset-dependent abnormalities (in terms of a gray matter excess in the early-onset group), which were found mainly in frontal regions. An excess of gray matter is not a usual finding in TLE. However, within a neurodevelopmental framework, retained gray matter is discussed as reflecting neurodevelopmental disruption. The findings indicate the importance of quantitative MRI for the detection of subtle secondary abnormalities in focal TLE and once more underline the importance of early seizure management in children with intractable TLE. |
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Keywords: | Temporal lobe epilepsy Epilepsy onset Voxel-based morphometry Brain development Brain morphology |
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