Visual evoked potential evidence for magnocellular system deficit in dyslexia

Title:

Visual evoked potential evidence for magnocellular system deficit in dyslexia

Creator:

Kubová, Z., Kuba, M., Peregrin, J., and Nováková, V.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:76c34b92-8d85-459d-8022-c064853c2e2a
uuid:76c34b92-8d85-459d-8022-c064853c2e2a

Subject:

dyslexia, visual evoked potentials, motion, and magnocellular system

Type:

article, model:article, and TEXT

Description:

Some recent studies on dyslexia have suggested a selective abnormality in the magnocellular visual pathway. To verify this hypothesis, we investigated motion-onset visual evoked potentials (VEPs) (predominantly testing the magnocellular system) as well as pattern-reversal VEPs (presumably testing the parvocellular system) in 20 dyslexics and 16 controls (both groups with a mean age of 10.0 years). Although the latencies and amplitudes of the main positive peak of pattern-reversal VEPs did not differ between the dyslexic and control group, the motion specific negative peak of motion-onset VEPs was significantly delayed (p<0.001) in dyslexics. Our results confirm a selective magnocellular pathway disorder in dyslexics and indicate that the motion-onset VEPs might serve as an objective method for early diagnosis of dyslexia.

Language:

English

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Source:

Physiological research | 1996 Volume:45 | Number:1

Harvested from:

CDK

Metadata only:

false