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Titolo:
Cerebral mechanisms underlying orienting of attention towards auditory frequency changes
Autore:
Yago, E; Escera, C; Alho, K; Giard, MH;
Indirizzi:
Univ Barcelona, Dept Psychiat & Clin Psychobiol, Neurodynam Lab, Barcelona08035, Spain Univ Barcelona Barcelona Spain 08035 urodynam Lab, Barcelona08035, Spain Univ Helsinki, Dept Psychol, Cognit Brain Res Unit, FIN-00014 Helsinki, Finland Univ Helsinki Helsinki Finland FIN-00014 it, FIN-00014 Helsinki, Finland INSERM, U280, F-69424 Lyon, France INSERM Lyon France F-69424INSERM, U280, F-69424 Lyon, France
Titolo Testata:
NEUROREPORT
fascicolo: 11, volume: 12, anno: 2001,
pagine: 2583 - 2587
SICI:
0959-4965(20010808)12:11<2583:CMUOOA>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
INVOLUNTARY ATTENTION; MISMATCH NEGATIVITY; PREFRONTAL CORTEX; SENSORY-MEMORY; POTENTIALS; DISCRIMINATION; GENERATORS; RESPONSES; SHIFTS; TIME;
Keywords:
audition; current density; event-related brain potentials; human; mismatch negativity; orienting response; source analysis;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
26
Recensione:
Indirizzi per estratti:
Indirizzo: Escera, C Univ Barcelona, Dept Psychiat & Clin Psychobiol, Neurodynam Lab,P Vall Hebron 171, Barcelona 08035, Spain Univ Barcelona P Vall Hebron 171Barcelona Spain 08035 5, Spain
Citazione:
E. Yago et al., "Cerebral mechanisms underlying orienting of attention towards auditory frequency changes", NEUROREPORT, 12(11), 2001, pp. 2583-2587

Abstract

Brain mechanisms underlying detection of auditory frequency changes were studied with event-related potentials (ERPs) in 14 human subjects discriminating visual stimuli. Scalp-current density mapping revealed bilateral components of mismatch negativity (MMN) in frontal and auditory cortices. Deviance-related activations in frontal and temporal cortex began to be significant at 94 ms and 154 ms in the right hemisphere, and at 128 ms and 132 ms inthe left hemisphere. The magnitude of MMN-neuroelectric currents from the left temporal cortex correlated significantly (r = -0.56, p < 0.05) with distraction caused by MMN-eliciting deviant tones. These results suggest a complex cerebral circuitry involved in frequency change detection and strongly support the role of this circuitry in driving attention involuntarily towards potentially relevant frequency changes in the acoustic environment. NeuroReport 12:2583-2587 (C) 2001 Lippincott Williams & Wilkins.

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Documento generato il 29/03/20 alle ore 18:16:56