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Titolo:
New approach to localize speech relevant brain areas and hemispheric dominance using spatially filtered magnetoencephalography
Autore:
Kober, H; Moller, M; Nimsky, C; Vieth, J; Fahlbusch, R; Ganslandt, O;
Indirizzi:
Univ Erlangen Nurnberg, Dept Neurosurg, Biomagnetism Grp, D-91054 Erlangen, Germany Univ Erlangen Nurnberg Erlangen Germany D-91054 -91054 Erlangen, Germany
Titolo Testata:
HUMAN BRAIN MAPPING
fascicolo: 4, volume: 14, anno: 2001,
pagine: 236 - 250
SICI:
1065-9471(200112)14:4<236:NATLSR>2.0.ZU;2-T
Fonte:
ISI
Lingua:
ENG
Soggetto:
FUNCTIONAL MRI; LANGUAGE LOCALIZATION; TEMPORAL CORTEX; CENTRAL SULCUS; VISUAL-FIELD; MEG; ACTIVATION; PET; STIMULATION; MOTOR;
Keywords:
magnetoencephalography; MEG; ERF; silent reading; silent naming; language lateralization; Wernicke; Broca;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
67
Recensione:
Indirizzi per estratti:
Indirizzo: Kober, H Univ Erlangen Nurnberg, Dept Neurosurg, Biomagnetism Grp, Schwabachanlage 6, D-91054 Erlangen, Germany Univ Erlangen Nurnberg Schwabachanlage 6 Erlangen Germany D-91054
Citazione:
H. Kober et al., "New approach to localize speech relevant brain areas and hemispheric dominance using spatially filtered magnetoencephalography", HUM BRAIN M, 14(4), 2001, pp. 236-250

Abstract

We used a current localization by spatial filtering-technique to determineprimary language areas with magnetoencephalography (MEG) using a silent reading and a silent naming task. In all cases we could localize the sensory speech area (Wernicke) in the posterior part of the left superior temporal gyrus (Brodmann area 22) and the motor speech area (Broca) in the left inferior frontal gyrus (Brodmann area 44). Left hemispheric speech dominance was determined in all cases by a laterality index comparing the current source strength of the activated left side speech areas to their right side homologous. In 12 cases we found early Wernicke and later Broca activation corresponding to the Wernicke-Geschwind model. In three cases, however, we alsofound early Broca activation indicating that speech-related brain areas need not necessarily be activated sequentially but can also be activated simultaneously. Magnetoencephalography can be a potent tool for functional mapping of speech-related brain areas in individuals, investigating the time-course of brain activation, and identifying the speech dominant hemisphere. This may have implications for presurgical planning in epilepsy and brain tumor patients. (C) 2001 Wiley-Liss, Inc.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/03/20 alle ore 15:07:33