PMID: 3769491Sep 1, 1986Paper

Interhemispheric coordination is compromised in subjects with developmental dyslexia

Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
H T HermannY Y Zeevi

Abstract

Developmental dyslexics (DDs) and good readers (GRs) were tested on measures of interhemispheric coordination. All subjects (ages 16 to 47) demonstrated normal oculomotor control and visual acuity, prior to testing. Subjects were instructed to track three different point-light source patterns (single stimulus in one hemifield, dual stimuli in one hemifield and a pair of simultaneous, symmetric, bihemifield stimuli [SSBS]), presented in random sequence and arrayed horizontally at +/- 5, +/- 10, and +/- 15 degrees of eccentricity. Tested with unihemifield stimuli, all subjects showed normal saccadic latencies and trajectories. In response to SSBS, all GRs had pronounced directional preference, choosing largely to track one side over the other. In contrast, DDs showed reduced laterality bias (p less than .025). DDs exhibited also significantly longer response latencies to SSBS than to unihemifield stimulation (p less than .01) and differed significantly from GRs (p less than .05).

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Citations

Jan 1, 1986·Annals of Dyslexia·H T HermannY Y Zeevi
Jun 1, 1995·Neuropsychologia·L H MooreJ C Zvi
May 6, 2008·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·K GiraudC Liégeois-Chauvel
Jun 21, 2005·Neuropsychologia·Alan BeatonAmanda Peggie
Apr 27, 2001·Perceptual and Motor Skills·M M WalkerM P Rastatter
Sep 1, 1991·Developmental Medicine and Child Neurology·M KinsbourneA K Berliner

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