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Changes in cerebral lateralization in aging.

L K Obler, S Woodward, M L Albert

    Neuropsychologia
    |January 1, 1984
    PubMed
    Summary
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    This study investigated age-related changes in brain lateralization for language. Researchers found no systematic age-related shifts in language processing lateralization in older adults.

    Area of Science:

    • Neuroscience
    • Cognitive Psychology
    • Human Aging

    Background:

    • Understanding brain lateralization for language is crucial for cognitive neuroscience.
    • Previous research suggests potential age-related shifts in hemispheric dominance for cognitive functions.

    Purpose of the Study:

    • To examine if language lateralization increases with age.
    • To investigate potential selective impairment of the right hemisphere in advanced age.

    Main Methods:

    • Tested 96 right-handed individuals (aged 25-80) using tachistoscopic verbal and non-verbal matching tasks.
    • Equalized task difficulty by adjusting exposure durations.
    • Analyzed exposure duration, error laterality, and response latency laterality.

    Main Results:

    Related Experiment Videos

    • Observed typical field effects, age-related slowing, and sex by task interactions.
    • Did not find evidence for systematic age-related changes in language lateralization.
    • Right hemisphere function in language tasks did not appear selectively impaired with age.

    Conclusions:

    • Advanced age does not appear to systematically alter left hemispheric lateralization for language.
    • The right hemisphere is not selectively impaired in language processing in older adults based on this study's findings.