Mismatch negativity and auditory sensory memory evaluationa new faster paradigm
作者:
Carles Grau,
Carles Escera,
Elena Yago,
M Polo,
期刊:
NeuroReport
(OVID Available online 1998)
卷期:
Volume 9,
issue 11
页码: 2451-2456
ISSN:0959-4965
年代: 1998
出版商: OVID
关键词: Audition;Echoic memory;Event-related brain potentials (ERP);Memory trace decay;MMN
数据来源: OVID
摘要:
A new faster paradigm to measure the duration of auditory sensory memory, as indexed by mismatch negativity (MMN) suppression to stimuli presented at increasing inter-stimulus intervals (ISI), is proposed. Trains of three stimuli were delivered at very short ISI (300 ms). The inter-train interval varied according to the memory probe interval (MPI) tested. Trains started randomly with a deviant or standard stimulus (50% each), with their event-related brain potentials subtracted to obtain the MMN. The new paradigm provided MMNs identical to the conventional one at MPIs of 0.4 and 4.0 s in young subjects, and revealed MMN suppression when the MPI was increased to 5.0 s in older subjects. The new paradigm estimates auditory sensory memory duration in one-third the time of conventional MMN.
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