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Titolo:
The processing of sound duration after left hemisphere stroke: Event-related potential and behavioral evidence
Autore:
Ilvonen, TM; Kujala, T; Tervaniemi, M; Salonen, O; Naatanen, R; Pekkonen, E;
Indirizzi:
Univ Helsinki, Dept Psychol, Cognit Res Unit, Helsinki 00014, Finland UnivHelsinki Helsinki Finland 00014 t Res Unit, Helsinki 00014, Finland Univ Helsinki, Cent Hosp, Dept Radiol, FIN-00014 Helsinki, Finland Univ Helsinki Helsinki Finland FIN-00014 ol, FIN-00014 Helsinki, Finland Univ Helsinki, Cent Hosp, Dept Neurol, FIN-00014 Helsinki, Finland Univ Helsinki Helsinki Finland FIN-00014 ol, FIN-00014 Helsinki, Finland Univ Helsinki, Cent Hosp, BioMag Lab, FIN-00014 Helsinki, Finland Univ Helsinki Helsinki Finland FIN-00014 ab, FIN-00014 Helsinki, Finland
Titolo Testata:
PSYCHOPHYSIOLOGY
fascicolo: 4, volume: 38, anno: 2001,
pagine: 622 - 628
SICI:
0048-5772(200107)38:4<622:TPOSDA>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
MISMATCH NEGATIVITY MMN; SUPERIOR TEMPORAL GYRUS; AUDITORY-CORTEX; EVOKED-POTENTIALS; MAGNETIC-FIELDS; REPLICABILITY; STIMULI; LESIONS; BRAIN; COMPONENTS;
Keywords:
event-related potentials; mismatch negativity (MMN); P1; N1; P2; stroke;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Social & Behavioral Sciences
Life Sciences
Citazioni:
32
Recensione:
Indirizzi per estratti:
Indirizzo: Ilvonen, TM Univ Helsinki, Dept Psychol, Cognit Res Unit, POB 13, Helsinki00014, Finland Univ Helsinki POB 13 Helsinki Finland 00014 ki 00014, Finland
Citazione:
T.M. Ilvonen et al., "The processing of sound duration after left hemisphere stroke: Event-related potential and behavioral evidence", PSYCHOPHYSL, 38(4), 2001, pp. 622-628

Abstract

The ability of left-hemisphere stroke patients (n = 8) and healthy controlsubjects (n = 8) to process sounds preattentively and attentively was studied by recording auditory event-related potentials (ERPs) and behavioral responses. For the right-ear stimulation. the mismatch negativity (MMN) was significantly smaller in the patients than control subjects over both hemispheres. For the left-ear stimuli, the MMN was significantly smaller in the patient group than in the control group over the left hemisphere, whereas nogroup differences were obtained over the right hemisphere. In addition, the N1 amplitude was reduced bilaterally For the right-ear stimulation (with the reduction being larger over the left hemisphere). whereas no significant effects on the N1 amplitude were found for the left-ear stimulation. Behaviorally, the patients detected significantly fewer deviant tones than did the control subjects irrespective of the stimulated ear. The present results thus suggest that the long-latency ERPs can be used to probe such auditory processing deficits that are difficult to define with behavioral measures. Especially by recording MMN to monaural stimuli, the discrimination accuracy can be separately determined for the left and right temporal lobes.

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Documento generato il 23/01/20 alle ore 04:14:54