PSY 3010 Lecture Notes - Lecture 4: Age 13, Menarche, Sleep Deprivation
Document Summary
Learning objectives: physical maturation, physical manifestations of puberty, growth during adolescence: the rapid pace of physical and sexual maturation. Earlier start of puberty is example of significant secular trend. Pattern of change occurring over several generations. Trends occur when physical characteristic changes over course of several generations. Result of better nutrition over centuries: puberty in girls. Begins earlier for girls than for boys: girls start puberty at around age 11 or 12, and boys begin at around age 13 or 14, wide variations among individuals. Environmental stress: health, onset of menarche, varies in different parts of world, begins later in poorer, developing countries. Influenced by proportion of fat to muscle in body: related to environmental stress, puberty in boys, penis and scrotum begin to grow at accelerated rate around age 12 and reach adult size about 3 or 4 years later. Enlargement of prostate gland and seminal vesicles: primary sex characteristics.
