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Normal aging in the nervous system: implications for SCI nurses.

B J Boss

    SCI Nursing : a Publication of the American Association of Spinal Cord Injury Nurses
    |June 1, 1991
    PubMed
    Summary
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    Aging causes brain changes, including neuronal loss and reduced neurotransmitters, affecting memory and processing speed. These neuroanatomical shifts impact learning and recovery times, particularly for spinal cord injury patients.

    Area of Science:

    • Neuroscience
    • Gerontology

    Background:

    • Aging involves significant microscopic and macroscopic brain alterations.
    • These changes include neuronal loss, reduced neurotransmitter availability, and the accumulation of pathological markers like plaques and tangles.
    • Macroscopic changes encompass brain volume reduction and thinning of cortical and white matter structures.

    Purpose of the Study:

    • To describe the normal microscopic and macroscopic changes associated with aging.
    • To elucidate the neurophysiological consequences of these neuroanatomical alterations.
    • To highlight nursing implications for spinal cord-injured individuals.

    Main Methods:

    • Review of existing literature on aging-related neuroanatomy and neurophysiology.
    • Description of observed microscopic changes (e.g., dendritic loss, receptor decrease).

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  • Description of observed macroscopic changes (e.g., brain weight reduction, cortical thinning).

    • Main Results:

    • Aging is associated with decreased brain weight, volume, and cortical thickness.
    • Microscopic changes include neuronal and dendritic loss, reduced neurotransmitters, and protein aggregate formation.
    • Neurophysiologically, aging leads to impaired recent memory, slower information processing, and increased neural conduction time.

    Conclusions:

    • Aging-related neuroanatomical changes significantly impact cognitive functions like memory and information processing.
    • Increased learning, response, and recovery times are direct neurophysiological consequences of brain aging.
    • Nursing care for spinal cord-injured patients must account for these age-related changes, emphasizing safety and extended learning periods.