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Related Experiment Videos

Speech-motor equivalence in aging subjects'.

M P Rastatter, R A McGuire, L Bushong

    Perceptual and Motor Skills
    |April 1, 1987
    PubMed
    Summary

    Aging speakers show speech-motor equivalence similar to 4-year-olds, with reduced facial muscle activity. This suggests a return to earlier operational levels and potential muscle atrophy in older adults.

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    Area of Science:

    • Neurology
    • Gerontology
    • Speech-language pathology

    Background:

    • Aging affects motor control and facial muscle function.
    • Speech-motor equivalence is a known phenomenon in development.
    • Limited research exists on speech-motor equivalence in geriatric populations.

    Purpose of the Study:

    • To compare speech-motor equivalence in elderly women with children and young adults.
    • To investigate changes in facial muscle EMG activity with advanced age.

    Main Methods:

    • Measured peak EMG amplitude in orbicularis oris superior, orbicularis oris inferior, and masseter muscles.
    • Compared elderly women (70-75 yrs) with existing data from 4- and 8-year-olds and young adults (21-29 yrs).

    Main Results:

    • Elderly subjects exhibited EMG variability patterns similar to 4-year-olds.
    • Reduced average peak EMG activity was observed in the elderly group compared to younger groups.
    • Findings suggest a potential return to earlier speech-motor control levels in aging.

    Conclusions:

    • Speech-motor equivalence may revert to an earlier developmental stage in aging speakers.
    • Decreased EMG activity in elderly individuals likely reflects age-related muscle function loss and atrophy.
    • Further research is needed to understand the implications of these changes for speech production in older adults.

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