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In humans, ageing represents the accumulation of changes in a human being over time and can encompass physical, psychological, and social changes. [3] [4] Reaction time, for example, may slow with age, while memories and general knowledge typically increase.
Enlargement of the ventricles, sulci and fissures is common in non-pathological aging. [6] Changes may also be associated with neuroplasticity, synaptic functionality and voltage-gated calcium channels. [7] Increased hyperpolarization, possibly due to dysfunctional calcium regulation, decreases neuron firing rate and plasticity.
However, research suggests that the aging process is associated with several structural, chemical, and functional changes in the brain as well as a host of neurocognitive changes. Recent reports in model organisms suggest that as organisms age, there are distinct changes in the expression of genes at the single neuron level. [4]
There has yet to be a distinct link between the two because it is hard to determine exactly how each aspect of aging effects the memory and aging process. However, it is known that the brain shrinks with age due to the expansion of ventricles causing there to be little room in the head. Unfortunately, it is hard to provide a solid link between ...
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]
The discovery was a revolutionary breakthrough in aging research, demonstrating that the aging process could be controlled in the laboratory, and sparked more research into the molecular biology of aging. [59] [60] 1995 Method for detection of senescent cells using a cytochemical assay. [61] 1997 The absolute record for the duration of human life.
Gerontology (/ ˌ dʒ ɛr ən ˈ t ɒ l ə dʒ i / JERR-ən-TOL-ə-jee) is the study of the social, cultural, psychological, cognitive, and biological aspects of aging.The word was coined by Ilya Ilyich Mechnikov in 1903, from the Greek γέρων (gérōn), meaning "old man", and -λογία (), meaning "study of".
Socioemotional selectivity theory (SST; developed by Stanford psychologist Laura L. Carstensen) is a life-span theory of motivation.The theory maintains that as time horizons shrink, as they typically do with age, people become increasingly selective, investing greater resources in emotionally meaningful goals and activities.