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Isolating the M(y)-cell response in dyslexia using the spatial frequency doubling illusion

Lookup NU author(s): Dr Kristen Pammer

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Abstract

The contribution of M(y)-cell activity within a framework of a magnocellular-deficit theory of dyslexia is currently unknown. Twenty-one dyslexic readers and 19 control readers were compared on their threshold detection for the frequency doubling illusion - an index of M(y)-cell activity, coherent motion, and a visual acuity task. The dyslexic group performed more poorly on detection of the frequency doubling illusion and coherent motion compared to the control group, but both groups performed comparably on the visual acuity task. The results from this study indicate that if a magno deficit exists in dyslexia, it may originate at a retinal level at least partly mediated by M(y)-cell abnormalities. © 2001 Elsevier Science Ltd.

Publication metadata

Author(s): Pammer K, Wheatley C

Publication type: Article

Publication status: Published

Journal: Vision Research

Year: 2001

Volume: 41

Issue: 16

Pages: 2139-2147

ISSN (print): 0042-6989

ISSN (electronic): 1878-5646

Publisher: Pergamon

URL: http://dx.doi.org/10.1016/S0042-6989(01)00092-X

DOI: 10.1016/S0042-6989(01)00092-X

PubMed id: 11403797

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