Cortical calculation localization using electrostimulation.

Détails

ID Serval
serval:BIB_E33A512D0E84
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Cortical calculation localization using electrostimulation.
Périodique
Journal of Neurosurgery
Auteur(s)
Roux F.E., Boukhatem L., Draper L., Sacko O., Démonet J.F.
ISSN
0022-3085 (Print)
ISSN-L
0022-3085
Statut éditorial
Publié
Date de publication
2009
Peer-reviewed
Oui
Volume
110
Numéro
6
Pages
1291-1299
Langue
anglais
Notes
Publication types: Journal Article Publication Status: ppublish. PDF type: Clinical article
Résumé
OBJECT: A naming task has been used to spare cortical areas involved in language. In the present study, a calculation task was combined with electrostimulation mapping (awake surgery) to spare cortical areas involved in calculation in patients undergoing surgery for brain lesions. The organization of language and calculation areas was analyzed in relation to these surgical data.
METHODS: Twenty patients with brain lesions close to areas possibly involved in calculation (dominant parietal lobe and F2) were prospectively studied over a 4-year period. Four patients had preoperative symptoms of acalculia and therefore were not included in the brain mapping procedure.
RESULTS: In 16 patients, direct electrostimulation caused calculation interferences in localized small cortical areas (< 2 cm(2)). Of the 53 calculation interferences found, 23 were independent of language areas, especially those in the inferior left parietal lobule. Various patterns of interference were observed (11 complete acalculia, 5 acalculia with wrong answers, 2 hesitations, and 5 mixed responses), although error patterns were fairly similar across angular, parietal, and frontal stimulation sites. Calculation areas in 4 patients could not be spared for oncological reasons; postoperatively, 3 of these patients showed significant acalculia symptoms. In contrast, none of the patients whose calculation areas were spared had arithmetic difficulties 1 month after surgery. Improvements in acalculia symptoms after surgery were also found in 3 of the 4 patients with preoperative calculation difficulties.
CONCLUSIONS: To limit the risk of personal and professional disturbances caused by acquired anarithmetia in patients undergoing surgery for brain tumors or epilepsy, the authors think it is necessary to use a calculation task during brain mapping, especially when operating in the dominant parietal lobe.
Mots-clé
Adult, Aged, Brain Mapping/methods, Brain Neoplasms/pathology, Brain Neoplasms/psychology, Cerebral Cortex/physiopathology, Cohort Studies, Comprehension/physiology, Electric Stimulation, Female, Humans, Language, Male, Mathematical Concepts, Middle Aged, Problem Solving/physiology, Reproducibility of Results, Treatment Outcome, Young Adult
Pubmed
Web of science
Création de la notice
24/03/2013 20:08
Dernière modification de la notice
20/08/2019 17:07
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