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Hormones play an organizational role, priming the body to behave in a certain way once puberty begins, [16] and an active role, referring to changes in hormones during adolescence that trigger behavioral and physical changes. [17] Puberty occurs through a long process and begins with a surge in hormone production, which in turn causes a number ...
Derived from the Latin puberatum (age of maturity), the word puberty describes the physical changes to sexual maturation, not the psychosocial and cultural maturation denoted by the term adolescent development in Western culture, wherein adolescence is the period of mental transition from childhood to adulthood, which overlaps much of the body ...
Childhood is the age span ranging from birth to adolescence. [7] In developmental psychology, childhood is divided up into the developmental stages of toddlerhood (learning to walk), early childhood (play age), middle childhood (school age), and adolescence (puberty through post-puberty). Various childhood factors could affect a person's ...
Research finds that the adolescent brain undergoes significant changes in neural connectivity and plasticity. During this period, there is a pruning process where certain neural connections are strengthened while others are eliminated, resulting in more efficient neural networks and increased cognitive abilities, such as decision-making and ...
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When developmental change is discontinuous, however, researchers may identify not only milestones of development, but related age periods often called stages. These stages are periods of time, often associated with known age ranges, during which a behavior or physical characteristic is qualitatively different from what it is at other ages.
During the first month, infants grow about 1 to 1.5 inches (2.5 to 3.8 cm) and gain weight at a rate of about 1 ounce (28 g) per day. [17] Resting heart rate is generally between 70 and 190 beats per minute. [18] Motor development. Moves in response to stimuli. [19] Displays several infantile reflexes, including:
The Tanner scale (also known as the Tanner stages or sexual maturity rating (SMR)) is a scale of physical development as pre-pubescent children transition into adolescence, and then adulthood. The scale defines physical measurements of development based on external primary and secondary sex characteristics , such as the size of the breasts ...