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Tuesday_Oct4th - Psychology 320 Dr Higley I Chapter 5...

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Psychology 320 Dr. Higley I. Chapter 5: Physical Development in Infancy and Toddlerhood a. Body growth a.i. Facts a.i.1. Gain 50% in height from birth to age 1; 75% by age 2 a.i.2. Grow in spurts a.i.3. Gain “baby fat” until about 9 months, then get slimmer a.i.3.a. Activity levels increase a.i.3.b. Scooting, walking, etc. a.i.4. Girls slightly shorter and lighter than boys a.ii. Trends a.ii.1. Cephalocaudal a.ii.1.a.“Head to tail” a.ii.1.b. Lower part of body grows later than the head a.ii.2. Proximodistal a.ii.2.a.“Near to far” a.ii.2.b. Extremities grow later than head, chest, and trunk a.ii.3. How do these occur? a.ii.3.a.Growth plate – cartilage (gristle) at the end of the long bones located between the epiphysis and metaphysis of the long bone a.ii.3.b. At the base of the growth plates on both sides of the bones shaft the plate produces bone causing growth a.iii. Baby skull (fontanels) a.iv. Brain development a.iv.1. Why are the visual and auditory systems peaking before the language and frontal cortex areas?
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