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Decreased processing of negative stimuli, as opposed to positive stimuli, appears in aging and becomes significant enough to detect even with autonomic nervous responses to emotionally charged stimuli. [12] Aging is also associated with decreased plantar reflex and Achilles reflex response. Nerve conductance also decreases during normal aging. [13]
Ageing (or aging in American English) is the process of becoming older. 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 . [ 1 ]
Aging is characterized by a progressive loss of physiological integrity, leading to impaired function and increased vulnerability to death. The hallmarks of aging are the types of biochemical changes that occur in all organisms that experience biological aging and lead to a progressive loss of physiological integrity, impaired function and, eventually, death.
Age-related neuropathologies such as Alzheimer's disease, Parkinson's disease, diabetes, hypertension and arteriosclerosis make it difficult to distinguish the normal patterns of aging. [ 18 ] [ 19 ] One of the important differences between normal aging and pathological aging is the location of neurofibrillary tangles.
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Biogerontology is the sub-field of gerontology concerned with the biological aging process, its evolutionary origins, and potential means to intervene in the process. [1] The term "biogerontology" was coined by S. Rattan , and came in regular use with the start of the journal Biogerontology in 2000.
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]