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Titolo:
Assessment of hemispheric language lateralization: A comparison between fMRI and fTCD
Autore:
Deppe, M; Knecht, S; Papke, K; Lohmann, H; Fleischer, H; Heindel, W; Ringelstein, EB; Henningsen, H;
Indirizzi:
Univ Munster, Dept Neurol, D-48129 Munster, Germany Univ Munster MunsterGermany D-48129 pt Neurol, D-48129 Munster, Germany Univ Munster, Dept Clin Radiol, D-48129 Munster, Germany Univ Munster Munster Germany D-48129 in Radiol, D-48129 Munster, Germany
Titolo Testata:
JOURNAL OF CEREBRAL BLOOD FLOW AND METABOLISM
fascicolo: 2, volume: 20, anno: 2000,
pagine: 263 - 268
SICI:
0271-678X(200002)20:2<263:AOHLLA>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Soggetto:
TRANSCRANIAL DOPPLER SONOGRAPHY; CEREBRAL BLOOD-FLOW; FUNCTIONAL MRI; WADA TEST; VELOCITY; ACTIVATION; HANDEDNESS; TASKS; REST;
Keywords:
functional transcranial Doppler ultrasound; evoked flow; functional magnetic resonance imaging; language;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
34
Recensione:
Indirizzi per estratti:
Indirizzo: Deppe, M Univ Munster, Dept Neurol, Albert Schweitzer Str 33, D-48129 Munster, Germany Univ Munster Albert Schweitzer Str 33 Munster Germany D-48129ny
Citazione:
M. Deppe et al., "Assessment of hemispheric language lateralization: A comparison between fMRI and fTCD", J CEREBR B, 20(2), 2000, pp. 263-268

Abstract

The cerebral blood flow velocity (CBFV) in the basal arteries during a word-generation task was assessed by functional transcranial Doppler ultrasonography (fTCD) and by functional magnetic resonance imaging (fMRI). The study investigates how event-related CBFV modulations in the middle cerebral artery (MCA) relate to regional cerebral blood flow (rCBF) changes. Both fMRIand fTCD were used in 13 subjects (7 men, 6 women, aged 21 to 44 years). The maximum differ -ence of relative CBFV changes between the left and rightMCA during the word-generation task was used as the language laterality index (LIfTCD). For the fMRI examination during the nearly identical languagetask, the corresponding index was defined by LIfMRI = 100(N-L- N-R)/(N-L N-R), where N-L and N-R refer to the numbers of voxels activated in the left and right hemisphere, respectively. The evoked CBFV changes expressed byLIfTCD and the corresponding laterality index, LIfMRI. estimated by fMRI showed a close linear relation (regression analysis: r = 0.95, p < 0.0001). The results of this study demonstrate that language-related velocity changes in the MCAs relate to rCBF increases in a linear fashion. Since the laterality indices assessed by fMRI and fTCD are in such close agreement both techniques can therefore be used in a complementary way.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 18/01/21 alle ore 16:30:56