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Titolo:
ELECTROPHYSIOLOGICAL EVIDENCE FOR CROSS-MODAL PLASTICITY IN HUMANS WITH EARLY-ONSET AND LATE-ONSET BLINDNESS
Autore:
KUJALA T; ALHO K; HUOTILAINEN M; ILMONIEMI RJ; LEHTOKOSKI A; LEINONEN A; RINNE T; SALONEN O; SINKKONEN J; STANDERTSKJOLDNORDENSTAM CG; NAATANEN R;
Indirizzi:
UNIV HELSINKI,DEPT PSYCHOL,COGNIT BRAIN RES UNIT,POB 13 FIN-00014 HELSINKI FINLAND UNIV HELSINKI,CENT HOSP,MED ENGN CTR,BIOMAG LAB HELSINKI FINLAND UNIV HELSINKI,CENT HOSP,DEPT RADIOL HELSINKI FINLAND
Titolo Testata:
Psychophysiology
fascicolo: 2, volume: 34, anno: 1997,
pagine: 213 - 216
SICI:
0048-5772(1997)34:2<213:EEFCPI>2.0.ZU;2-L
Fonte:
ISI
Lingua:
ENG
Soggetto:
CONGENITALLY DEAF ADULTS; BRAIN POTENTIALS; OCCIPITAL CORTEX; VISUAL-CORTEX; PROJECTIONS; DEPRIVATION; RESPONSES; CAT;
Keywords:
BLINDNESS; BRAIN PLASTICITY; AUDITORY DISCRIMINATION; EVENT-RELATED POTENTIALS;
Tipo documento:
Review
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Physical, Chemical & Earth Sciences
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
25
Recensione:
Indirizzi per estratti:
Citazione:
T. Kujala et al., "ELECTROPHYSIOLOGICAL EVIDENCE FOR CROSS-MODAL PLASTICITY IN HUMANS WITH EARLY-ONSET AND LATE-ONSET BLINDNESS", Psychophysiology, 34(2), 1997, pp. 213-216

Abstract

It is commonly believed that sensory deprivation can lead to cross-modal reorganization in an immature but not in a mature brain. The results of the present study suggest, however, that plasticity between sensory modalities is possible even in adults: activity indicating involvement of parietal or occipital brain areas in pitch-change discrimination was found in individuals blinded after childhood. Event-related brain potentials of early blinded (before the age of 2 years), late-blinded (12-28 years of age), and sighted adults were recorded to stimulus sequences consisting of standard tones occasionally replaced by deviant tones. Even when participants were not attending to auditory stimuli, the deviant tones elicited the mismatch negativity (MMN) in each group. There were no significant MMN front-back scalp distribution differences among the groups. However, when participants were detecting deviant stimuli, these stimuli elicited N2 and P3 waves that were posterior in distribution in both groups of blind participants relative to those of the sighted participants. These results suggest that cross-modalreorganization may occur even in the mature human brain.

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Documento generato il 04/07/20 alle ore 11:59:22