Neuronal loss associated with cognitive performance in amyotrophic lateral sclerosis: an (11C)-flumazenil PET study

Wicks, Paul, Turner, Martin R, Abrahams, Sharon, Hammers, Alexander, Brooks, David J, Leigh, Nigel and Goldstein, Laura H (2008) Neuronal loss associated with cognitive performance in amyotrophic lateral sclerosis: an (11C)-flumazenil PET study. Amyotrophic Lateral Sclerosis : official publication of the World Federation of Neurology Research Group on Motor Neuron Diseases, 9 (1). pp. 43-9. ISSN 1471-180X

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Abstract

Amyotrophic lateral sclerosis (ALS) is a multi-system disorder. Mild cognitive deficits are present in a subgroup of non-demented patients with ALS. Detailed neuropsychological assessments reveal deficits of word retrieval including impairments on tests of verbal fluency and confrontation naming. The PET GABA(A) receptor ligand [11C]-flumazenil is a marker of neuronal dysfunction in ALS. This study used [11C]-flumazenil PET to identify correlations between cortical regions and impairments in word retrieval. Twelve patients with ALS underwent [11C]-flumazenil PET and neuropsychological assessment, including tests of written letter fluency and confrontation naming. Poorer performance on verbal fluency correlated with decreased [11C]-flumazenil binding in a region including the right inferior frontal gyrus, superior temporal gyrus, and anterior insula. Poorer performance on a test of confrontation naming correlated with decreased binding in the left middle frontal gyrus (extending to Broca's area) and left cuneus. This study indicates that [11C]-flumazenil PET can be used to help localize cortical regions associated with cognitive deficits in ALS

Item Type: Article
Keywords: ALS, MND, neuroimaging, executive function, PET, verbal fluency, confrontation naming
Schools and Departments: Brighton and Sussex Medical School > Clinical Medicine
Subjects: R Medicine > RC Internal medicine > RC0321 Neurosciences. Biological psychiatry. Neuropsychiatry > RC0346 Neurology. Diseases of the nervous system Including speech disorders
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Depositing User: Patricia Butler
Date Deposited: 14 Nov 2012 17:37
Last Modified: 14 Nov 2012 17:37
URI: http://sro.sussex.ac.uk/id/eprint/42523
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