PSYC 2P12 Chapter Notes - Chapter 4: Visual Acuity, Ossification, Primitive Reflexes
29 Sep 2016
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Chapter 4: physical, sensory and perceptual development in infancy. Marked by dramatic physical, as well as cognitive and emotional growth. At no point in life will a person grow at this rapidly. The infant grows substantially in body size, develops the nervous system substantially, and develops complexity in the major organ systems, like heart and lungs. During infancy, babies grow 25 to 30 centimetres and triple their body weight in the first year. At about age 2 for girls and age 2 for boys, toddlers are half as tall as they will be as adults. Two-year-olds have proportionately much larger heads than do adults needed to hold their nearly full-sized brains. Adaptive reflexes: help newborns survive, like sucking; some adaptive reflexes persist throughout life. Reflexes are automatic, hard-wired responses to stimulation. E. g. pupils dilating in dark rooms, hand withdrawing when we touch hot items, or our leg jumping when our kneecap is tapped.
