Personality traits related to juvenile myoclonic epilepsy: MRI reveals prefrontal abnormalities through a voxel-based morphometry study
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Date
2009-06-01
Authors
Araujo Filho, Gerardo Maria de [UNIFESP]
Jackowski, Andrea Parolin [UNIFESP]
Lin, Katia [UNIFESP]
Guaranha, Mirian S. B. [UNIFESP]
Guilhoto, Laura M. F. F. [UNIFESP]
Silva, Henrique Hattori da [UNIFESP]
Sales Ferreira Caboclo, Luis Otavio [UNIFESP]
Carrete Junior, Henrique [UNIFESP]
Bressan, Rodrigo Affonseca [UNIFESP]
Yacubian, Elza Márcia Targas [UNIFESP]
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Abstract
Studies involving juvenile myoclonic epilepsy (JME) patients have demonstrated an elevated prevalence of cluster B personality disorders (PD) characterized as emotional instability, immaturity, unsteadiness, lack of discipline, and rapid mood changes. We aimed to verify a possible correlation between structural brain abnormalities in magnetic resonance image (MRI) and the PD in JME using voxel-based morphometry (VBM). Sixteen JME patients with cluster B PD, 38 JME patients without psychiatric disorders, and 30 healthy controls were Submitted to a psychiatric evaluation through SCID I and II and to a MRI scan. Significant reduction in thalami and increase in mesiofrontal and frontobasal regions' volumes were observed mainly in JME patients with PD. Structural alterations of the orbitofrontal cortex (OFC), involved in regulation of mood reactivity, impulsivity, and social behavior, were also observed. This study supports the hypothesis of frontobasal involvement in the pathophysiology of cluster B PD related to JME. (C) 2009 Elsevier Inc. All rights reserved.
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Epilepsy & Behavior. San Diego: Academic Press Inc Elsevier Science, v. 15, n. 2, p. 202-207, 2009.