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Titolo:
EVENT-RELATED POTENTIAL INDEXES OF SEMANTIC PROCESSING IN SCHIZOPHRENIA
Autore:
ANDREWS S; SHELLEY AM; WARD PB; FOX A; CATTS SV; MCCONAGHY N;
Indirizzi:
UNIV NEW S WALES,SCH PSYCHOL KENSINGTON NSW 2033 AUSTRALIA UNIV NEW S WALES,SCH PSYCHIAT KENSINGTON NSW 2033 AUSTRALIA PRINCE WALES HOSP,DEPT PSYCHIAT SYDNEY NSW AUSTRALIA
Titolo Testata:
Biological psychiatry
fascicolo: 7, volume: 34, anno: 1993,
pagine: 443 - 458
SICI:
0006-3223(1993)34:7<443:EPIOSP>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
POSITIVE-NEGATIVE DICHOTOMY; BRAIN POTENTIALS; WORD REPETITION; LEXICAL DECISIONS; SYMPTOMS; SENTENCE; ATTENTION; CONTEXTS; LANGUAGE; N400;
Keywords:
SCHIZOPHRENIA; LANGUAGE; N400; SEMANTIC; PRIMING; THOUGHT DISORDER; ATTENTIONAL IMPAIRMENT;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
76
Recensione:
Indirizzi per estratti:
Citazione:
S. Andrews et al., "EVENT-RELATED POTENTIAL INDEXES OF SEMANTIC PROCESSING IN SCHIZOPHRENIA", Biological psychiatry, 34(7), 1993, pp. 443-458

Abstract

Event-related potentials (ERPs) were recorded while schizophrenic patients and healthy controls read congruous and incongruous sentences inanticipation of a memory test. The schizophrenic group performed morepoorly in both recognition memory and cued recall tests. The two groups did not differ in the amplitude of the N400 component of the ERP but the difference between the ERPs to congruous and incongruous sentences persisted longer in the schizophrenic sample. The schizophrenic sample also showed reduced parietal positivity and a reduced effect of congruity on the late positive component that follows N400. Within the schizophrenic sample, measures of attentional impairment and positive thought disorder were correlated with mean amplitude of both the N400 and the subsequent positivity. The results imply that the structure andspread of activation within semantic memory is not impaired in schizophrenia. Rather, impairments appear to lie in processes required to integrate activated information with the current context.

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Documento generato il 09/07/20 alle ore 01:31:47