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Age-dependent changes in central somatosensory conduction time.

H Strenge, J Hedderich

    European Neurology
    |January 1, 1982
    PubMed
    Summary
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    Older adults exhibit prolonged somatosensory evoked potential (SEP) latencies, particularly in the N13 and N20 components. This age-related slowing in nerve signal transmission may correlate with morphological changes.

    Area of Science:

    • Neuroscience
    • Physiology
    • Gerontology

    Background:

    • Somatosensory evoked potentials (SEPs) are electrophysiological measures reflecting the integrity of the somatosensory nervous system.
    • Age-related changes in nervous system morphology and function are well-documented, but their specific impact on SEP parameters requires further elucidation.

    Purpose of the Study:

    • To investigate age-related differences in cervical and cortical somatosensory evoked potentials (SEPs).
    • To analyze specific SEP components and inter-component transit times in different age groups.

    Main Methods:

    • Recorded cervical and cortical SEPs in 45 healthy subjects across different age ranges.
    • Measured absolute peak latencies and latency differences for SEP components P7, N9, N11, N13, P17, and N20.

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  • Performed statistical analysis to compare SEP parameters between age groups (15-39 years vs. 40-60 years).

    • Main Results:

    • Subjects aged 40-60 years demonstrated significantly longer latencies for N13 and N20 components compared to younger subjects (15-39 years).
    • A significant prolongation in transit times (N9-N13, N11-N13, and N13-N20) was observed in the older age group.
    • These findings indicate age-related slowing in somatosensory pathway conduction velocity.

    Conclusions:

    • Aging is associated with delayed latencies in specific SEP components and prolonged inter-component transit times.
    • The observed electrophysiological changes in SEPs may be linked to known age-related morphological alterations in the nervous system.
    • SEP analysis provides a valuable tool for assessing age-related functional changes in somatosensory pathways.