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Titolo:
Handedness and hemispheric language dominance in healthy humans
Autore:
Knecht, S; Drager, B; Deppe, M; Bobe, L; Lohmann, H; Floel, A; 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:, 12
pagine: 2512 - 2518
SICI:
0006-8950(200012)123:<2512:HAHLDI>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
TRANSCRANIAL DOPPLER SONOGRAPHY; CEREBRAL BLOOD-FLOW; FUNCTIONAL MRI; WORD GENERATION; LEFT-HANDERS; LATERALIZATION; APHASIA; RECOVERY; SPEECH; INJURY;
Keywords:
language lateralization; hemispheric dominance; handedness; functional Doppler ultrasonography;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Life Sciences
Citazioni:
31
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., "Handedness and hemispheric language dominance in healthy humans", BRAIN, 123, 2000, pp. 2512-2518

Abstract

In most people the left hemisphere of the brain is dominant for language. Because of the increased incidence of atypical right-hemispheric language in left-handed neurological patients, a systematic association between handedness and dominance has long been suspected. To clarify the relationship between handedness and language dominance in healthy subjects, we measured lateralization directly by functional transcranial Doppler sonography in 326 healthy individuals using a word-generation task. The incidence of right-hemisphere language dominance was found to increase linearly with the degree of left-handedness, from 4% in strong right-handers (handedness = 100) to 15% in ambidextrous individuals and 27% in strong left-handers (handedness =-100), The relationship could be approximated by the formula: likelihood of right-hemisphere language dominance (%) = 15% handedness (%)/10. These results clearly demonstrate that the relationship between handedness and language dominance is not an artefact of cerebral pathology but a natural phenomenon.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 20/01/21 alle ore 02:51:19