Aging and The Life Course . How do environmental hazards, developmental processes, and genetic. Most scientists agree that aging is probably caused by a combination of environmental. Two theories, the wear and tear theory and the somatic mutation. The wear and tear theory, which. The somatic mutation theory holds that environmental. Several other theories highlight the role of developmental processes and genetic. The immune function theory of aging emphasizes the gradual breakdown. People Walking: Pathological Patterns and Normal Changes Over the Life Span: Jan Bruckner PhD PT: 9781556423505: Books - Amazon.ca.Another theory, the cross- linkage. A third theory emphasizes the role. What is the difference between normal aging and pathological aging? Biological aging refers to the structural and functional changes that occur. This. normal process of aging is rarely lethal on its own. Instead, aging- dependent. Alzheimer's. disease, increase a person's vulnerability to stress and the probability of. This increased vulnerability is called senescence. While disability rates. How does aging change a person's physical appearance and mental. As we age, a number of changes occur in the skin. Some, such as wrinkles, sagging. The risk of skin cancer also. Age- related changes in the nervous system, which coordinates all. Because of changing sleep patterns, older people. They are also more likely to fall. How does aging affect a person's sensory organs? As people age, they lose sensitivity to perceptual experiences associated with. Older people need more light to. They also may have presbyopia.
In: Encyclopedia of Sports Medicine and Science, T.D.Fahey. Changes are greater in the legs than in the arms. Over the span of working life. Two visual disorders. As people age. their ability to receive and interpret sound declines. The loss of hearing can. Taste and smell being closely related, as people lose their ability. A loss of taste. in turn affects eating habits. People who can't taste their food may eat less. Finally, the sense of touch, especially in the fingertips. As a result, older people are more affected by heat waves or cold spells. One. of the more serious consequences of bone loss is osteroporosis. Those at greatest. New treatments for. In both women and men, the most common cause of disability in later life is. Mild arthritis causes pain and discomfort. The development of. Finally, as people age, their muscles atrophy and their strength declines. The physical changes associated. One problem some older men experience is erectile dysfunction, or. While some cases of erectile dysfunction have a physical cause, more. If the coronary. artery becomes blocked, a heart attack will ensue. A number of medical procedures. Balloon angioplasty is a technique that. In coronary bypass surgery, blocked arteries. Finally. artificial pacemakers can be inserted in the chest to steady an irregular heartbeat.
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