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Related Experiment Videos

Developmental and aging changes in somatosensory, auditory and visual evoked potentials.

T Allison, A L Hume, C C Wood

    Electroencephalography and Clinical Neurophysiology
    |July 1, 1984
    PubMed
    Summary

    Human sensory systems undergo significant developmental and aging changes, affecting nerve conduction times and brain pathways. These age-related sensory changes vary by system, age period, and are more pronounced in males.

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    Area of Science:

    • Neuroscience
    • Human Physiology
    • Developmental Biology

    Background:

    • Sensory system function changes throughout the human lifespan.
    • Understanding these changes is crucial for diagnosing neurological disorders and assessing overall health.

    Purpose of the Study:

    • To investigate developmental and aging alterations in human sensory pathways.
    • To analyze changes in somatosensory, auditory, and visual evoked potentials across a wide age range.

    Main Methods:

    • Recorded short-latency somatosensory, brain-stem auditory, and pattern-reversal visual evoked potentials in 286 individuals (ages 4-95).
    • Analyzed peak and interpeak latencies, and visual evoked potential amplitudes.

    Main Results:

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  • Developmental changes (latency decreases) were observed in some somatosensory and visual cortical pathways, completing around age 17.
  • Aging changes (latency increases) were noted in the median nerve, spinal cord, auditory pathways, and sensory cortex.
  • Visual evoked potential amplitudes decreased with age, and aging effects were more significant in males.

    • Conclusions:

    • Age-related sensory changes are not uniform across all pathways.
    • Developmental maturation of sensory cortex extends into late adolescence.
    • Sensory system aging exhibits differential patterns based on specific neural structures and sex.