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Human cerebral hemispheres develop at different rates and ages.

R W Thatcher, R A Walker, S Giudice

    Science (New York, N.Y.)
    |May 29, 1987
    PubMed
    Summary
    This summary is machine-generated.

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    Brain hemisphere development in children was studied using electroencephalographic measures. Findings reveal continuous growth and distinct developmental spurts, differing between left and right hemispheres.

    Area of Science:

    • Neuroscience
    • Developmental Neuroscience
    • Cognitive Neuroscience

    Background:

    • Cerebral hemisphere development is crucial for cognitive functions.
    • Understanding the timing and patterns of brain maturation is essential.
    • Previous research has explored various aspects of brain development.

    Purpose of the Study:

    • To assess the developmental trajectory of cerebral hemispheres using electroencephalographic (EEG) measures.
    • To identify age-dependent changes in EEG coherence and phase.
    • To compare developmental rates and timing between the left and right hemispheres.

    Main Methods:

    • Electroencephalographic coherence and phase were measured in 577 children.
    • Participants ranged in age from 2 months to early adulthood.

    Related Experiment Videos

  • Data analysis focused on identifying age-dependent patterns of change.

    • Main Results:

    • Two primary patterns of age-dependent change were observed: continuous exponential growth and discrete growth spurts.
    • These growth spurts occurred in specific anatomical locations and at specific postnatal periods.
    • The left and right hemispheres exhibited different developmental rates and postnatal onset times.
    • The timing of observed growth spurts correlated with Piaget's major developmental stages.

    Conclusions:

    • Cerebral hemisphere development follows distinct patterns, including continuous growth and localized spurts.
    • Hemispheric development is asymmetrical, with differing rates and timing for left and right sides.
    • The developmental timeline of brain maturation aligns with established cognitive developmental stages.