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Titolo:
N4 TO SPOKEN SENTENCES IN YOUNG AND OLDER SUBJECTS
Autore:
WOODWARD SH; FORD JM; HAMMETT SC;
Indirizzi:
DEPT VET AFFAIRS MED CTR,NATL CTR PTSD,DIV CLIN EDUC,323D6,3801 MIRANDA AVE PALO ALTO CA 94304 DEPT VET AFFAIRS MED CTR,PSYCHIAT SERV PALO ALTO CA 00000 STANFORD UNIV,MED CTR,SCH MED,DEPT PSYCHIAT STANFORD CA 94305
Titolo Testata:
Electroencephalography and clinical neurophysiology
fascicolo: 5, volume: 87, anno: 1993,
pagine: 306 - 320
SICI:
0013-4694(1993)87:5<306:NTSSIY>2.0.ZU;2-H
Fonte:
ISI
Lingua:
ENG
Soggetto:
EVENT-RELATED POTENTIALS; BRAIN POTENTIALS; WORD REPETITION; EVOKED-POTENTIALS; AGE-DIFFERENCES; WORKING MEMORY; ERP ANALYSIS; LONG LAGS; ADULT AGE; TASK;
Keywords:
N4; EVENT-RELATED POTENTIALS; AUDITORY LANGUAGE COMPREHENSION; AGING; ATTENTION; MEMORY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
56
Recensione:
Indirizzi per estratti:
Citazione:
S.H. Woodward et al., "N4 TO SPOKEN SENTENCES IN YOUNG AND OLDER SUBJECTS", Electroencephalography and clinical neurophysiology, 87(5), 1993, pp. 306-320

Abstract

Event-related potentials (ERPs) to spoken sentences were recorded from young and elderly subjects. Sentences ended in semantically typical or atypical words. Subjects listened to the sentences during two attention conditions. In a semantic attention task, subjects listened to the meanings of the sentences for a subsequent memory test. In a phonemic attention task, subjects counted words beginning with the letter ''p. '' Following these tasks, the sentence-final words were presented in isolation. A conventional auditory oddball paradigm was also presented. The N4 components elicited by semantically atypical sentence-final words were slightly attenuated and delayed in the older group. N4 was not influenced by the attention manipulation. Young but not older subjects' N4s were attenuated by repetition. When the sentence-final words were presented a third time in isolation, the N4s elicited were similar in amplitude and latency to those elicited in sentence context, but were not attenuated by repetition. In young and older subjects, the peak amplitude of the sentence-elicited N4 difference wave form was highly correlated with the number of correct recognitions of typical words, but not atypical sentence-final words. In young but not older subjects, sentence-elicited N4 amplitude was correlated with the amplitude of the P3 elicited in the auditory oddball paradigm.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/11/20 alle ore 19:26:09