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Titolo:
Altered hemispheric asymmetry of auditory magnetic fields to tones and syllables in schizophrenia
Autore:
Rockstroh, B; Kissler, J; Mohr, B; Eulitz, C; Lommen, U; Wienbruch, C; Cohen, R; Elbert, T;
Indirizzi:
Univ Konstanz, Dept Psychol, D-78457 Constance, Germany Univ Konstanz Constance Germany D-78457 chol, D-78457 Constance, Germany
Titolo Testata:
BIOLOGICAL PSYCHIATRY
fascicolo: 8, volume: 49, anno: 2001,
pagine: 694 - 703
SICI:
0006-3223(20010415)49:8<694:AHAOAM>2.0.ZU;2-5
Fonte:
ISI
Lingua:
ENG
Soggetto:
PLANUM TEMPORALE ASYMMETRY; CEREBRAL ASYMMETRY; LATERALIZATION; MAGNETOENCEPHALOGRAPHY; REVERSAL; SPEECH; MRI; ABNORMALITIES; DYSFUNCTION; STIMULATION;
Keywords:
schizophrenia; magnetoencephalography; hemispheric asymmetry; N100m; syllables; auditory; verbal processing; tone perception;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
49
Recensione:
Indirizzi per estratti:
Indirizzo: Rockstroh, B Univ Konstanz, Dept Psychol, POB D23, D-78457 Constance, Germany Univ Konstanz POB D23 Constance Germany D-78457 nce, Germany
Citazione:
B. Rockstroh et al., "Altered hemispheric asymmetry of auditory magnetic fields to tones and syllables in schizophrenia", BIOL PSYCHI, 49(8), 2001, pp. 694-703

Abstract

Background: A growing body of literature suggests that schizophrenic patients often do nor show the normal brain hemispheric asymmetry. We have foundthis for simple tones presented to the right ear in a previous study. In this study we extended this investigation to left ear stimulation and verbalstimuli. Methods: With a whole-head neuromagnetometer, contra- and ipsilateral auditory-evoked magnetic fields in response to tones (1000 Hz) and to the syllables ("ba") delivered to the left and right ears in separate runs were compared between schizophrenic patients (n = 17) and healthy control subjects (n = 15). Results: In response to tones, all control subjects showed the expected asymmetry (contralateral predominance) of the auditory-evoked magnetic N100m (dipole moment). In the patient sample asymmetry was reversed following tones presented to the left ear in 47% and following tones to the right ear in24%. In response to syllables, the asymmetry was similar between groups. In patients compared with control subjects the N100m was located more anterior without asymmetry between hemispheres. Conclusions: Results suggest that deviation from the normal functional lateralization in schizophrenia appears in a proportion of patients at a basicstage of auditory processing, but may be compensated for at higher levels such as the processing of syllables. (C) 2001 Society of Biological psychiatry.

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Documento generato il 25/01/20 alle ore 10:03:55