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Cortical reorganization in deaf children
1Gallaudet Research Institute, Washington, DC 20002.
Journal of Clinical and Experimental Neuropsychology
|March 1, 1990
Summary
Prelingual deafness in children may reorganize the brain's cerebral cortex. Deaf children showed different neural differentiation and compensatory visual cortex activity compared to hearing children.
Area of Science:
- Neuroscience
- Developmental Neuroscience
- Cognitive Neuroscience
Background:
- Prelingual deafness, present from birth, can impact neurodevelopment.
- Understanding brain plasticity in deaf individuals is crucial for auditory rehabilitation and cognitive development.
Purpose of the Study:
- To investigate cerebral cortex reorganization in prelingual deaf children.
- To compare electroencephalographic (EEG) measures between deaf and hearing children.
Main Methods:
- Topographic mapping of the cerebral cortex using electroencephalographic (EEG) coherence, phase, and power.
- Comparison of EEG data between 79 deaf children and a control group of hearing children.
Main Results:
- Deaf children exhibited altered neural differentiation in specific left and right hemispheric areas.
- Higher total power in the bilateral frontal cortex was observed in deaf children.
- Evidence suggested compensatory functioning in the visual cortex of deaf subjects.
Conclusions:
- Prelingual deafness is associated with a partial reorganization of the cerebral cortex.
- The pattern of reorganization may be influenced by the cause of deafness.
- Findings highlight the brain's adaptability in response to sensory deprivation.