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Titolo:
Language lateralization in healthy right-handers
Autore:
Knecht, S; Deppe, M; Drager, B; Bobe, L; Lohmann, H; Ringelstein, EB; Henningsen, H;
Indirizzi:
Univ Munster, Dept Neurol, D-48129 Munster, Germany Univ Munster MunsterGermany D-48129 pt Neurol, D-48129 Munster, Germany
Titolo Testata:
BRAIN
, volume: 123, anno: 2000,
parte:, 1
pagine: 74 - 81
SICI:
0006-8950(200001)123:<74:LLIHR>2.0.ZU;2-H
Fonte:
ISI
Lingua:
ENG
Soggetto:
TRANSCRANIAL DOPPLER SONOGRAPHY; CEREBRAL BLOOD-FLOW; SEX-DIFFERENCES; BRAIN ORGANIZATION; FUNCTIONAL MRI; WADA TEST; APHASIA; RECOVERY; VELOCITY; PERFORMANCE;
Keywords:
language lateralization; hemispheric dominance; aphasia; Doppler-ultrasonography;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Life Sciences
Citazioni:
60
Recensione:
Indirizzi per estratti:
Indirizzo: Knecht, S Univ Munster, Dept Neurol, Albert Schweitzer Str 33, D-48129 Munster, Germany Univ Munster Albert Schweitzer Str 33 Munster Germany D-48129 y
Citazione:
S. Knecht et al., "Language lateralization in healthy right-handers", BRAIN, 123, 2000, pp. 74-81

Abstract

Our knowledge about the variability of cerebral language lateralization isderived from studies of patients: with brain lesions and thus possible secondary reorganization of cerebral functions. In healthy right-handed subjects 'atypical', i.e, right hemisphere language dominance, has generally beenassumed to be exceedingly rare. To test this assumption we measured language lateralization in 188 healthy subjects with moderate and strong right-handedness (59% females) by a new non-invasive, quantitative technique previously validated by direct comparison with the intracarotid amobarbital procedure, During a word generation task the averaged hemispheric perfusion differences within the territories of the middle cerebral arteries were determined. (i) The natural distribution of language lateralization was found to occur along a bimodal continuum. (ii) Lateralization was equivalent in men and women,. (iii) Right hemisphere dominance was found in 7.5% of subjects, These findings indicate that atypical language dominance in healthy right-handed subjects of either sex is considerably more common than previously suspected.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 20/01/21 alle ore 11:35:17