New Evidence Supports Cognitive Decline in Temporal Lobe Epilepsy
- 1 January 2007
- journal article
- editorial
- Published by SAGE Publications in Epilepsy Currents
- Vol. 7 (1), 12-14
- https://doi.org/10.1111/j.1535-7511.2007.00155.x
Abstract
Cognitive Prognosis in Chronic Temporal Lobe Epilepsy. Hermann BP, Seidenberg M, Dow C, Jones J, Rutecki P, Bhattacharya A, Bell B. Ann Neurol 2006;60:80–87. Objective: First, to determine whether patients with chronic temporal lobe epilepsy have a different cognitive trajectory compared to control subjects over a prospective 4-year interval; second, to determine the proportion of patients who exhibit abnormal cognitive change and their profile of demographic, clinical epilepsy, and baseline quantitative magnetic resonance imaging characteristics; and third, to determine the most vulnerable cognitive domains. Methods: Participants with chronic temporal lobe epilepsy ( N = 46) attending a tertiary referral clinic and healthy control subjects ( N = 65) underwent neuropsychological assessment and reevaluation 4 years later. Analysis of test–retest patterns identified individual patients with adverse cognition outcomes. Results: The prospective cognitive trajectory of patients with chronic temporal lobe epilepsy differs from age- and sex-matched healthy control subjects. Lack of practice effects is common, but frank adverse cognitive outcomes are observed in a subset of patients (20%–25%), particularly in vulnerable cognitive domains that include memory. Cognitive declines are associated with a profile of abnormalities in baseline quantitative magnetic resonance volumetrics, lower baseline intellectual capacity, as well as longer duration of epilepsy and older chronological age. Interpretation: Cognitive prognosis is poor for a subset of patients characterized by chronicity of epilepsy, older age, lower intellectual ability, and more baseline abnormalities in quantitative magnetic resonance volumetrics.Keywords
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