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Titolo:
Focused and nonfocused attention in verbal and emotional dichotic listening: An FMRI study
Autore:
Jancke, L; Buchanan, TW; Lutz, K; Shah, NJ;
Indirizzi:
Univ Magdeburg, Dept Gen Psychol, D-39106 Magdeburg, Germany Univ Magdeburg Magdeburg Germany D-39106 hol, D-39106 Magdeburg, Germany Res Ctr Julich, Inst Med, Julich, Germany Res Ctr Julich Julich GermanyRes Ctr Julich, Inst Med, Julich, Germany Univ Iowa, Div Cognit Neurosci, Dept Neurol, Iowa City, IA 52242 USA Univ Iowa Iowa City IA USA 52242 ci, Dept Neurol, Iowa City, IA 52242 USA
Titolo Testata:
BRAIN AND LANGUAGE
fascicolo: 3, volume: 78, anno: 2001,
pagine: 349 - 363
SICI:
0093-934X(200109)78:3<349:FANAIV>2.0.ZU;2-8
Fonte:
ISI
Lingua:
ENG
Soggetto:
AUDITORY SELECTIVE ATTENTION; EVENT-RELATED FMRI; MAGNETIC-RESONANCE; PHONETIC DISCRIMINATION; DIRECTED ATTENTION; PLANUM TEMPORALE; HUMAN-BRAIN; LANGUAGE; CORTEX; ASYMMETRY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Social & Behavioral Sciences
Life Sciences
Citazioni:
50
Recensione:
Indirizzi per estratti:
Indirizzo: Jancke, L Univ Magdeburg, Dept Gen Psychol, Univ Pl, D-39106 Magdeburg, Germany Univ Magdeburg Univ Pl Magdeburg Germany D-39106 eburg, Germany
Citazione:
L. Jancke et al., "Focused and nonfocused attention in verbal and emotional dichotic listening: An FMRI study", BRAIN LANG, 78(3), 2001, pp. 349-363

Abstract

Functional magnetic resonance imaging (fMRI) was used to identify corticalregions which are involved in two dichotic listening tasks. During one task the subjects were required to allocate attention to both ears and to detect a specific target word (phonetic task), while during a second task the subjects were required to detect a specific emotional tone (emotional task). During three attentional conditions of each task-, the subjects were required to focus attention to the right (FR) or left ear (FL), while during a third condition subjects were required to allocate attention to both ears simultaneously. In 11 right-handed male subjects, these dichotic listening tasks evoked strong activations in a temporofrontal network involving auditory cortices located in the temporal lobe and prefrontal brain regions. Hemodynamic responses were measured in the following regions of interest: Heschl's gyros (HG), the planum polare (PP), the planum temporale (PT). the anterior superior temporal sulcus (aSTS), the posterior superior temporal sulcus(pSTS), and the inferior frontal gyrus region (IFG) of both hemispheres. The following findings were obtained: (1) the degree of activation in HG andPP depends on the direction of attention. In particular it was found that selectively attending to right-ear input led to increased activity specifically in the left HG and PP and attention to left ear input increased right-sided activity in these structures (2) hemodynamic responses in the PT, aSTS, pSTS. and IFG were not modulated by the different focused-attention conditions; (3) hemodynamic responses in HG and PP in the nonforced conditions were the sum activation of the forced conditions: (4) there was no general difference between the phonetic and emotion tasks in terms of hemodynamic responses (5) hemodynamic responses in the PT and pSTS were strongly left-lateralized. reflecting the specialization of these brain regions for language processing. These findings are discussed in the context of current theories of hemispheric specialization. (C) 2001 Acadernic Press.

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Documento generato il 20/01/20 alle ore 22:21:40