Developmental dyslexia: Passive visual stimulation provides no evidence for a magnocellular processing defect

Developmental dyslexia: Passive visual stimulation provides no evidence for a magnocellular... Livingstone et al. (Livingstone, M. S., Rosen, G. D., Drislane, F. W. and Galaburda, A. M. Physiological and anatomical evidence for a magnocellular defect in developmental dyslexia. Proceedings of the National Academy of Science U.S.A. 88, 7943–7947, 1991) presented evidence for a defect of the magnocellular visual processing stream in developmental dyslexia. They reported diminished visual evoked potentials (VEP) to low-contrast, rapid checkerboard reversal patterns in the dyslexics. We attempted to replicate this effect using transient and steady-state VEPs to checkerboard reversal stimuli in a group of adult developmental dyslexics. Several different reversal rates and contrast levels were utilized. No differences were found between the dyslexic and control groups for the low-contrast, rapidly reversing patterns, nor for any combination of stimulus rate or contrast that was tested. Thus, these findings do not support a magnocellular processing deficit in developmental dyslexia. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Neuropsychologia Elsevier

Developmental dyslexia: Passive visual stimulation provides no evidence for a magnocellular processing defect

Loading next page...
 
/lp/elsevier/developmental-dyslexia-passive-visual-stimulation-provides-no-evidence-cyw2ptKkzD
Publisher
Elsevier
Copyright
Copyright © 1996 Elsevier Ltd
ISSN
0028-3932
D.O.I.
10.1016/0028-3932(96)00026-7
Publisher site
See Article on Publisher Site

Abstract

Livingstone et al. (Livingstone, M. S., Rosen, G. D., Drislane, F. W. and Galaburda, A. M. Physiological and anatomical evidence for a magnocellular defect in developmental dyslexia. Proceedings of the National Academy of Science U.S.A. 88, 7943–7947, 1991) presented evidence for a defect of the magnocellular visual processing stream in developmental dyslexia. They reported diminished visual evoked potentials (VEP) to low-contrast, rapid checkerboard reversal patterns in the dyslexics. We attempted to replicate this effect using transient and steady-state VEPs to checkerboard reversal stimuli in a group of adult developmental dyslexics. Several different reversal rates and contrast levels were utilized. No differences were found between the dyslexic and control groups for the low-contrast, rapidly reversing patterns, nor for any combination of stimulus rate or contrast that was tested. Thus, these findings do not support a magnocellular processing deficit in developmental dyslexia.

Journal

NeuropsychologiaElsevier

Published: Nov 1, 1996

References

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Search

Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly

Organize

Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.

Access

Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve

Freelancer

DeepDyve

Pro

Price

FREE

$49/month
$360/year

Save searches from
Google Scholar,
PubMed

Create folders to
organize your research

Export folders, citations

Read DeepDyve articles

Abstract access only

Unlimited access to over
18 million full-text articles

Print

20 pages / month

PDF Discount

20% off