Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Coherence of hemispheric function in developmental dyslexia.

Gerald Leisman1

  • 1Department of Philosophy, Psychology, and Cognitive Science, Rensselaer Polytechnic Institute, Troy, New York 12180, USA. drgersh@yahoo.com

Brain and Cognition
|May 28, 2002
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same journal

Gelastic dysarthria: Speech-triggered pathological laughter with evidence for a selective pontine gating mechanism.

Brain and cognition·2026
Same journal

Brain correlates of linguistic-cognitive stimulation in neurotypical and Atypical older adult populations: A systematic review.

Brain and cognition·2026
Same journal

Effects of Dieting on Neural Encoding of Preferences for Edible and Non-Edible Rewards: An ERP Study.

Brain and cognition·2026
Same journal

Structural complexity of brain regions in mild cognitive impairment and Alzheimer's disease.

Brain and cognition·2026
Same journal

Spatial navigation training enhances performance on large-scale and small-scale spatial tasks through different neural mechanisms.

Brain and cognition·2026
Same journal

Unraveling the link between brain injury and enhanced artistic skills.

Brain and cognition·2026

Developmental dyslexia shows distinct brainwave patterns in the left parieto-occipital region. This suggests dyslexia may stem from reduced communication between brain hemispheres, a functional hemispheric disconnection syndrome.

Area of Science:

  • Neuroscience
  • Developmental Neuroscience
  • Cognitive Neuroscience

Background:

  • Developmental dyslexia is a common learning disorder affecting reading.
  • Previous research suggests potential neurological underpinnings.
  • Understanding the neural basis is crucial for effective interventions.

Purpose of the Study:

  • To investigate electroencephalographic (EEG) differences between dyslexic and normal individuals.
  • To explore functional connectivity in the left parieto-occipital regions.
  • To determine if dyslexia can be characterized as a hemispheric disconnection syndrome.

Main Methods:

  • Recording EEG frequency spectrum from left parieto-occipital leads in dyslexic and normal participants.
  • Analyzing EEG coherence values to assess inter-hemispheric and intra-hemispheric sharing.

Related Experiment Videos

  • Comparing spectral and coherence data between the two groups.

    • Main Results:

    • Significant differences in EEG frequency spectrum were observed between dyslexics and controls.
    • Normals exhibited greater EEG coherence between symmetrical homologous locations (inter-hemispheric).
    • Dyslexics showed significantly greater EEG coherence within hemispheres (intra-hemispheric).

    Conclusions:

    • The findings indicate distinct functional organization in the left parieto-occipital areas of dyslexics.
    • Reduced inter-hemispheric sharing and increased intra-hemispheric sharing support a disconnection model.
    • Developmental dyslexia is proposed to be a functional hemispheric disconnection syndrome.