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Psychophysiology Psychophysiology

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Basic auditory dysfunction in dyslexia as demonstrated by brain activity measurements

Published online by Cambridge University Press:  01 March 2000

TEIJA KUJALA ,
KATJA MYLLYVIITA ,
MARI TERVANIEMI ,
KIMMO ALHO ,
JARI KALLIO  and
RISTO NÄÄTÄNEN
TEIJA KUJALA
Affiliation:
Cognitive Brain Research Unit, Department of Psychology, University of Helsinki, Finland
KATJA MYLLYVIITA
Affiliation:
Cognitive Brain Research Unit, Department of Psychology, University of Helsinki, Finland
MARI TERVANIEMI
Affiliation:
Cognitive Brain Research Unit, Department of Psychology, University of Helsinki, Finland
KIMMO ALHO
Affiliation:
Cognitive Brain Research Unit, Department of Psychology, University of Helsinki, Finland
JARI KALLIO
Affiliation:
Cognitive Brain Research Unit, Department of Psychology, University of Helsinki, Finland
RISTO NÄÄTÄNEN
Affiliation:
Cognitive Brain Research Unit, Department of Psychology, University of Helsinki, Finland
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Abstract

Although the generality of dyslexia and its devastating effects on the individual's life are widely acknowledged, its precursors and associated neural mechanisms are poorly understood. One of the two major competing views maintains that dyslexia is based primarily on a deficit in linguistic processing, whereas the other view suggests a more general processing deficit, one involving the perception of temporal information. Here we present evidence in favor of the latter view by showing that the neural discrimination of temporal information within complex tone patterns fails in dyslexic adults. This failure can be traced to early cortical mechanisms that process auditory information independently of attention.

Keywords

Dyslexia Temporal processing Preattentive auditory discrimination Mismatch negativity
Type
SPECIAL REPORT
Information
Psychophysiology , Volume 37 , Issue 2 , March 2000 , pp. 262 - 266
Copyright
© 2000 Society for Psychophysiological Research

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