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Senescence (/ s ɪ ˈ n ɛ s ə n s /) or biological aging is the gradual deterioration of functional characteristics in living organisms. Whole organism senescence involves an increase in death rates or a decrease in fecundity with increasing age, at least in the later part of an organism's life cycle.
Geriatric psychology began in 1978 with a spike in interest in mental health and the effects of aging. There was a slow increase in the number of aging adults in the U.S. population. There was a small group of 11 people who met together to talk about late-life mental health needs and the field of geriatrics.
Ageing (or aging in American English) is the process of becoming older until death.The term refers mainly to humans, many other animals, and fungi; whereas for example, bacteria, perennial plants and some simple animals are potentially biologically immortal.
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.
Adult development encompasses the changes that occur in biological and psychological domains of human life from the end of adolescence until the end of one's life. Changes occur at the cellular level and are partially explained by biological theories of adult development and aging. [1]
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]
Reduced mental and cognitive ability: [90] [91] Memory loss is common in old age due to the brain's decreased ability to encode, store, and retrieve information. It takes more time to learn the same amount of new information. [92] The prevalence of dementia increases in old age from about 10% at age 65 to about 50% over age 85. [93]
A midlife crisis is a transition of identity and self-confidence that can occur in middle-aged individuals, typically 45 to 64/65 years old. [1] [2] [3] The phenomenon is described as a psychological crisis brought about by events that highlight a person's growing age, inevitable mortality, and possible lack of accomplishments in life.