A1 Refereed original research article in a scientific journal
Crossmodal temporal processing acuity impairment aggravates with age in developmental dyslexia
Authors: Virsu V, Lahti-Nuuttila P, Laasonen M
Publisher: ELSEVIER SCI IRELAND LTD
Publication year: 2003
Journal:: Neuroscience Letters
Journal name in source: NEUROSCIENCE LETTERS
Journal acronym: NEUROSCI LETT
Volume: 336
Issue: 3
First page : 151
Last page: 154
Number of pages: 4
ISSN: 0304-3940
DOI: https://doi.org/10.1016/s0304-3940(02)01253-3
Abstract
Temporal processing has been found to be impaired in developmental dyslexia. We investigated how aging affects crossmodal temporal processing impairment with 39 dyslexic and 40 fluent 20-59-year-old readers. Cognitive temporal acuity was measured at millisecond levels in six tasks. They consisted of order judgments of two brief non-speech stimulus pulses, the stimuli being audiotactile, visuotactile and audiovisual, and of simultaneity/nonsimultaneity detection of the pulses in two parallel three-pulse trains. Temporal acuity declined with age in both reading groups and its impairment was observed in developmental dyslexia. A new finding was that the crossmodal temporal impairment, directly relevant to reading, increased with age. The age-related exacerbation suggests a developmental neuronal deficit, possibly related to magnocells, which exists before dyslexia and is its ontogenetic cause. (C) 2002 Elsevier Science Ireland Ltd. All rights reserved.
Temporal processing has been found to be impaired in developmental dyslexia. We investigated how aging affects crossmodal temporal processing impairment with 39 dyslexic and 40 fluent 20-59-year-old readers. Cognitive temporal acuity was measured at millisecond levels in six tasks. They consisted of order judgments of two brief non-speech stimulus pulses, the stimuli being audiotactile, visuotactile and audiovisual, and of simultaneity/nonsimultaneity detection of the pulses in two parallel three-pulse trains. Temporal acuity declined with age in both reading groups and its impairment was observed in developmental dyslexia. A new finding was that the crossmodal temporal impairment, directly relevant to reading, increased with age. The age-related exacerbation suggests a developmental neuronal deficit, possibly related to magnocells, which exists before dyslexia and is its ontogenetic cause. (C) 2002 Elsevier Science Ireland Ltd. All rights reserved.
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