Relationship of lesion location to cognitive outcome following microelectrode-guided pallidotomy for Parkinson's disease
Identifieur interne : 003452 ( Main/Exploration ); précédent : 003451; suivant : 003453Relationship of lesion location to cognitive outcome following microelectrode-guided pallidotomy for Parkinson's disease
Auteurs : Wendy J. Lombardi ; Robert E. Gross ; Lisa L. Trepanier ; Anthony E. Lang ; Andres M. Lozano ; Jean A. Saint-Cyr [Canada]Source :
- Brain [ 0006-8950 ] ; 2000-04.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Homme.
English descriptors
- KwdEn :
- CALT = Conditional Associative Learning Test, CVLT = California Verbal Learning Test, Cognition, Evolution, Exeresis, GDS = Geriatric Depression Scale, GPi = globus pallidus internus, Human, Localization, Microelectrode, Motricity, Nervous network, PASAT = Paced Auditory Serial Addition Test, Pallidum, Parkinson disease, Parkinson's disease, Psychometrics, Treatment, UPDRS = Unified Parkinson's Disease Rating Scale, cognition, globus pallidus, neuropsychology, pallidotomy.
Abstract
Current models of basal ganglia anatomy posit the existence of multiple parallel, anatomically segregated circuits. Anatomical data from non-human primates suggest that the circuits subserving motor functions are segregated from those subserving cognitive functions. Here we present data that demonstrate that, in humans, motor and cognitive frontosubcortical circuits are segregated. We studied a group of patients with Parkinson's disease undergoing surgical lesioning of the globus pallidus internus for relief of their symptoms. Lesion location along an anteromedial-to-posterolateral axis was found to be related to postsurgical outcome on both cognitive and motor measures. Performance on several neuropsychological measures, including the generation of category exemplars and continuous mental addition, was linearly related to distance along this axis, with anteromedial lesions leading to postsurgical impairment, intermediate lesions having little effect and posterolateral lesions leading to an improvement on several measures. The same relationship was found between memory performance under conditions of proactive interference and lesion location within the globus pallidus internus. In contrast, bradykinesia, assessed as the speed of finger-tapping, had a non-linear relationship to lesion location, intermediate lesions leading to greater postsurgical improvement than lesions in more extreme anteromedial or posterolateral locations. These data demonstrate that the cognitive effects of pallidotomy can be dissociated from the motor effects. These effects depend upon the placement of the lesions within the globus pallidus internus, supporting the segregation of functionally distinct circuits in the human pallidum.
Url:
DOI: 10.1093/brain/123.4.746
Affiliations:
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Le document en format XML
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The same relationship was found between memory performance under conditions of proactive interference and lesion location within the globus pallidus internus. In contrast, bradykinesia, assessed as the speed of finger-tapping, had a non-linear relationship to lesion location, intermediate lesions leading to greater postsurgical improvement than lesions in more extreme anteromedial or posterolateral locations. These data demonstrate that the cognitive effects of pallidotomy can be dissociated from the motor effects. 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