Related Experiment Videos
Loss of deep dyslexic reading ability from a second left-hemispheric lesion
Archives of Neurology
|March 1, 1987
Summary
Residual reading ability in deep dyslexia is often thought to involve the right hemisphere. However, this study found that for one deep dyslexic patient, this ability depended on left hemispheric structures.
Area of Science:
- Neuroscience
- Cognitive Psychology
- Neurolinguistics
Background:
- Deep dyslexia is an acquired reading disorder characterized by semantic paralexias.
- Previous hypotheses suggested right hemispheric involvement in residual reading abilities in deep dyslexia.
Observation:
- A patient with deep dyslexia, resulting from a left hemispheric stroke, exhibited residual reading abilities.
- A subsequent left hemispheric stroke led to the complete loss of this patient's residual reading capacity.
Findings:
- The study demonstrated that the patient's deep dyslexic reading abilities were critically dependent on left hemispheric function.
- This finding challenges the prevailing hypothesis regarding right hemispheric compensation in deep dyslexia.
Implications:
- Results suggest that left hemispheric structures are essential for residual reading in some cases of deep dyslexia.
- This has significant implications for understanding brain plasticity and developing targeted rehabilitation strategies for acquired reading disorders.