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Related Experiment Videos

Block design performance following callosal sectioning. Observations on functional recovery.

J E LeDoux, D H Wilson, M S Gazzaniga

    Archives of Neurology
    |August 1, 1978
    PubMed
    Summary

    Corpus callosum surgery impacts hand control. Post-surgery, the right hemisphere gains control over the right hand, improving performance over time in constructional tasks.

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    Interview with floyd e. Bloom.

    Journal of cognitive neuroscience·2013

    Area of Science:

    • Neuroscience
    • Cognitive Psychology
    • Neuropsychology

    Background:

    • The corpus callosum facilitates interhemispheric communication, crucial for coordinated motor control and cognitive functions.
    • Surgical sectioning of the corpus callosum (callosotomy) results in disconnection of the cerebral hemispheres, leading to unique behavioral and cognitive deficits.

    Observation:

    • A patient 17 months post-callosotomy was assessed on a constructional task using separate left and right hand testing.
    • Testing involved conditions of free visual input and lateralized visual field exposure to evaluate hemispheric processing.

    Findings:

    • Improved right-hand performance over time post-surgery was observed.
    • This improvement is linked to the right hemisphere developing homolateral control over the right hand, bypassing the severed corpus callosum.

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    Implications:

    • Findings offer insights into right-hemisphere dominance for motor control and its adaptation after callosotomy.
    • This research contributes to understanding the neural basis of constructional apraxia and brain plasticity.