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Titolo:
Modulation and task effects in auditory processing measured using fMRI
Autore:
Hall, DA; Haggard, MP; Akeroyd, MA; Summerfield, AQ; Palmer, AR; Elliott, MR; Bowtell, RW;
Indirizzi:
Univ Nottingham, MRC, Inst Hearing Res, Nottingham NG7 2RD, England Univ Nottingham Nottingham England NG7 2RD , Nottingham NG7 2RD, England Univ Nottingham, Sch Phys & Astron, MRC, Nottingham NG7 2RD, England Univ Nottingham Nottingham England NG7 2RD , Nottingham NG7 2RD, England
Titolo Testata:
HUMAN BRAIN MAPPING
fascicolo: 3, volume: 10, anno: 2000,
pagine: 107 - 119
SICI:
1065-9471(200007)10:3<107:MATEIA>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
PARIETAL CORTEX ACTIVATION; FUNCTIONAL MRI; SELECTIVE ATTENTION; RHESUS-MONKEY; HUMAN BRAIN; MOTOR; CONJUNCTION; VOLUNTARY; INTENSITY; PRIMATES;
Keywords:
audition; fMRI; modulation; target discrimination; anterior superior temporal gyrus;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
47
Recensione:
Indirizzi per estratti:
Indirizzo: Hall, DA Univ Nottingham, MRC, Inst Hearing Res, Univ Pk, Nottingham NG7 2RD, England Univ Nottingham Univ Pk Nottingham England NG7 2RD 2RD, England
Citazione:
D.A. Hall et al., "Modulation and task effects in auditory processing measured using fMRI", HUM BRAIN M, 10(3), 2000, pp. 107-119

Abstract

Active listening has been reported to elicit a different sensory response from passive listening and is generally observed as an increase in the magnitude of activation. Sensory activation differences may therefore be maskedby the effect of attention. The present study measured activation induced by static and modulated tones, while controlling attention by using target-discrimination and passive listening tasks. The factorial design enabled usto determine whether the stimulus-induced activation in auditory cortex was independent of the information-processing demands of the task. Contrastedagainst a silent baseline, listening to the tones induced widespread activation in the temporal cortex, including Heschl's gyrus (HG), planum temporale, superior temporal gyrus (STG), and superior temporal sulcus. No additional auditory areas were recruited in the response to modulated tones compared to static tones, but there was an increase in the response in the STG, anterior to HG. Relative to passive listening, the active task increased theresponse in the STG, posterior to HG. The active task also recruited regions in the frontal and parietal cortex and Subcortical areas. These findingsindicate that preferential responses to the changing spectro-temporal properties of the stimuli and to the target-discrimination task involve distinct, non-overlapping areas of the secondary auditory cortex. Thus, in the present study, differences in sensory activation were not masked by the effects of attention. (C) 2000 Wiley-Liss, Inc.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 20/01/20 alle ore 10:18:26