[Cerebral lateralization in constitutional dyslexia. Electrophysiologic findings]
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Updated: Oct 13, 2026

Assessment of Cerebral Lateralization in Children using Functional Transcranial Doppler Ultrasound (fTCD)
Published on: September 26, 2010
S Johannes1, G R Mangun, T F Münte
1Neurologische Klinik mit Klinischer Neurophysiologie, Medizinische Hochschule Hannover.
Abstract:
Event-related brain potentials were recorded from a group of developmental dyslexics using a simple visual discrimination task and compared to the results of a control group. A large P3 component was elicited which did not differ in overall amplitude between groups. While the distribution was virtually symmetrical in the dyslexic group, there was a left hemispheric preponderance in the control group. The latencies of the P3 were longer in the dyslexic group than in the control group. The results are compared to findings of neuroanatomical and neuroimaging studies which revealed less hemispheric asymmetries in dyslexics compared to control subjects.
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