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Aging is associated with many changes in the central nervous system, such as mild atrophy of the cortex, which is considered non-pathological. Aging is also associated with many neurological and neurodegenerative diseases, such as amyotrophic lateral sclerosis , dementia , mild cognitive impairment , Parkinson's disease , and Creutzfeldt ...
An elderly couple exhibiting typical signs of physical aging At the sensory level, changes occur to vision, hearing, taste, touch, and smell. Two common sensory changes that begin in midlife include our ability to see close objects and our ability to hear high pitches.
Studies comparing the effects of aging on episodic memory, semantic memory, short-term memory and priming find that episodic memory is especially impaired in normal aging; some types of short-term memory are also impaired. [9] The deficits may be related to impairments seen in the ability to refresh recently processed information. [10]
The scientists aren’t sure exactly what impact those changes have on health. Previous research showed that resting energy use, or metabolic rate, didn’t change from ages 20 to 60. The new ...
An elderly Somali woman An elderly woman walks along a road. Social theories, or concepts, [ 159 ] propose explanations for the distinctive relationships between old people and their societies. One theory, proposed in 1961, is the disengagement theory , which proposes that, in old age, a mutual disengagement between people and their society ...
Aging entails many physical, biological, chemical, and psychological changes and the brain is no exception to this phenomenon. These various changes have attempted to be mapped by conceptual models like the Scaffolding Theory of Aging and Cognition (STAC) in 2009.
Traditional definitions of successful aging have emphasized absence of physical and cognitive disabilities. [158] In their 1987 article, Rowe and Kahn characterized successful aging as involving three components: a) freedom from disease and disability, b) high cognitive and physical functioning, and c) social and productive engagement. [ 159 ]
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