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Titolo:
Multiple supratemporal sources of magnetic and electric auditory evoked middle latency components in humans
Autore:
Yvert, B; Crouzeix, A; Bertrand, O; Seither-Preisler, A; Pantev, C;
Indirizzi:
INSERM, U280, F-69424 Lyon 03, France INSERM Lyon France 03INSERM, U280, F-69424 Lyon 03, France Univ Munster, Inst Expt Audiol, D-4400 Munster, Germany Univ Munster Munster Germany D-4400 Expt Audiol, D-4400 Munster, Germany
Titolo Testata:
CEREBRAL CORTEX
fascicolo: 5, volume: 11, anno: 2001,
pagine: 411 - 423
SICI:
1047-3211(200105)11:5<411:MSSOMA>2.0.ZU;2-P
Fonte:
ISI
Lingua:
ENG
Soggetto:
SUPERIOR TEMPORAL GYRUS; PLANUM TEMPORALE; FUNCTIONAL-ANATOMY; TONOTOPIC ORGANIZATION; LINEAR DISCRETIZATION; SOURCE LOCALIZATION; CEREBRAL ASYMMETRY; COMPLEX SOUNDS; CORTEX; POTENTIALS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
80
Recensione:
Indirizzi per estratti:
Indirizzo: Yvert, B INSERM, U280, 151 Cours Albert Tomas, F-69424 Lyon 03, France INSERM 151 Cours Albert Tomas Lyon France 03 424 Lyon 03, France
Citazione:
B. Yvert et al., "Multiple supratemporal sources of magnetic and electric auditory evoked middle latency components in humans", CEREB CORT, 11(5), 2001, pp. 411-423

Abstract

The supratemporal sources of the earliest auditory cortical responses (20-80 ms) were identified using simultaneously recorded electroencephalographic (EEG) and magnetoencephalographic (MEG) data. Both hemispheres of six subjects were recorded two or three times in different sessions in response to8000 right-ear 1 kHz pure tones stimuli. Four components were identified: Pa (28 ms), Nb (40 ms), and two subcomponents of the Pb complex, termed Pbl(52 ms) and Pb2 (74 ms). Based on MEG data, the corresponding sources werelocalized on the anatomy using individual realistic head models: Pa in themedial portion of Heschl's gyri (H1/H2); Nb/Pb1 in the lateral aspect of the supratemporal gyrus (STG); and Pb2 in the antero-lateral portion of Heschl's gyri. All sources were oriented antero-superiorly. This pattern was dearest in the contralateral hemisphere, where these three activities could be statistically dissociated. Results agree with previous invasive human intracerebral recordings, with animal studies reporting secondary areas involved in the generation of middle latency auditory-evoked components, and withpositron emission tomography and functional magnetic resonance imaging studies often reporting these three active areas although without temporal information. The early STG activity may be attributed to parallel thalamo-cortical connections, or to cortico-cortical connections between the primary auditory cortex and the STG, as recently described in humans.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 17/01/20 alle ore 21:13:11