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The Influence of Stroke Location on Cognitive and Mood Impairment. A Voxel-Based Lesion-Symptom Mapping Study

      Abstract

      Background and purpose: The role of stroke location as a determinant of mood and cognitive symptoms is still a matter of debate. The aim of this study was to identify the predictive value of ischemic stroke location, on a voxel basis, for mood and cognitive outcome. Materials and methods: A prospective monocentric study including patients with a supratentorial ischemic stroke was conducted. A 3 Tesla brain MRI was performed at baseline. Mood and cognition were assessed using Hospital Anxiety and Depression scale (HAD), apathy inventory (AI), and Montreal Cognitive Assessment scale subscores, performed at 3 months poststroke. Statistical maps of ischemic stroke location associated with 3 months mood and cognitive scores were obtained using a voxel-based lesion-symptom mapping approach (Brunner and Munzel test). Significant voxels (false discovery rate [FDR] corrected-P < .01) were identified using the standard Montreal Neurological Institute-152 space template. Results: Two hundred and sixty-five nonsevere stroke patients were included (64% men, mean age 66 ± 14, median National Institute of Health Stroke Score 3, interquartile range 2-6). Ischemic stroke location was not associated with HAD or AI scores. Language, abstraction, and delayed recall performances were mainly associated with left-side hemispheric lesions. Lesions in both hemispheres were associated with lower performances in visuospatial and executive functions, naming, attention, and orientation. Conclusion: Ischemic stroke location does not predict mood outcome at 3 months but is a determinant of cognitive outcome in specific domains.

      Key Words

      Abbreviations:

      VLSM (voxel-based lesion-symptom mapping), MoCA (Montreal Cognitive Assessment), NIHSS (National Institute of Health Stroke Score), IQCODE (Informant Questionnaire on Cognitive Decline in the Elderly), HAD-A (-D) (Hospital Anxiety And Depression-anxiety (-Depression)), AI (apathy inventory), MNI (Montreal Neurological Institute), FDR (false discovery rate), SD (standard deviation), IQR (interquartile range)
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