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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 ]
For example, phrases like "I want to be forever young" [52] and "never trust adults" became increasingly common, and youth began to prevail over wisdom, associated with aging, in terms of popularity. Many youth groups developed at the beginning of the 20th century in several Western countries. One example was the Boy Scouts of America. [51]
In medicine and the social sciences, a young adult is generally a person in the years following adolescence, sometimes with some overlap. [1] Definitions and opinions on what qualifies as a young adult vary, with works such as Erik Erikson's stages of human development significantly influencing the definition of the term; generally, the term is often used to refer to adults in approximately ...
Developmental biology is the study of the process by which animals and plants grow and develop. Developmental biology also encompasses the biology of regeneration, asexual reproduction, metamorphosis, and the growth and differentiation of stem cells in the adult organism.
Youth participation is the active engagement of young people throughout their own communities. It is often used as a shorthand for youth participation in any many forms, including decision-making, sports, schools and any activity where young people are not historically engaged.
Adolescent health, or youth health, is the range of approaches to preventing, detecting or treating young people's health and well-being. [ 1 ] The term adolescent and young people are often used interchangeably, as are the terms Adolescent Health [ 2 ] and Youth Health.
In progenesis or paedogenesis, sexual development is accelerated. [7] Both neoteny and progenesis result in paedomorphism [8] (as having the form typical of children) or paedomorphosis [9] (changing towards forms typical of children), a type of heterochrony. [10] It is the retention in adults of traits previously seen only in the young.
Critical periods of plasticity occur in the prenatal brain and continue throughout childhood until adolescence and are very limited during adulthood. Two major factors influence the opening of critical periods: cellular events (i.e. changes in molecular landscape) and sensory experience (i.e. hearing sound, visual input, etc.).