Decline in sensory system with aging
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The aging process typically is associated with decline in function for the various senses. All aspects of sensory function- touch, taste, smell, sight, and hearing- diminish with age, resulting in modest sensory changes in older people.
Declines in sensory function often reflect the combined effect of age-related changes in both the sensory organ and the central nervous system processing of sensory information. Combination of defects in several sensory modalities are often found in older individuals.
Dr. Chauhan at University of Alberta in Canada reports that changes in the taste system with age may be related to nutrient intake, which in turn can be influenced by taste. Vitamins A, thiamin, B6, B12, folic acid, zinc, and copper are thought to influence taste function.
Visual aging is generally associated with a decline in spatial vision for stationary stimuli, especially those of high spatial frequency. Dr. Kline at the University of Notre Dame in Canada observed that some, but probably not all, of this loss can be attributed to age-related changes in the ocular media responsible for attenuating and scattering incident light.
Three modes of treatment- nutrition, lifestyle and hormone therapy- may both expand number of years that comprise human life span, while, at the same time, they can help reverse the declining body systems as they age.
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