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Human brain evoked potentials and discrimination of short acoustic stimuli with various frequency

Aleksandrov, A.A.; Starostina, L.V.; Stankevich, L.N.

Rossiiskii Fiziologicheskii Zhurnal Imeni I.M. Sechenova 89(8): 913-918

2003

ISSN/ISBN: 0869-8139
PMID: 15119185
Document Number: 554680
We found that the mismatch negativity (MMM) was absent in evoked potentials in passive condition for frequency deviant acoustical stimuli when stimulus duration was only 11-30 ms. But it was shown that it is possible for participants to fairly well discriminate these stimuli and the component N2b in RP was generated without preceding MMN. Processing negativity also was absent in potentials by the minimal stimulus duration (11 ms). Auditory discrimination nevertheless was still possible, but reaction time and number of committed errors increased significantly.

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