PSYB20H3 Chapter 5: Chapter 5
Document Summary
Chapter 5- physical development and health, birth to age 3. Infancy is from birth to when child begins walking and stringing words together (takes b/w 12-18 months) Toddlerhood from 18-(cid:1007)(cid:1010) (cid:373)o(cid:374)ths (cid:894)(cid:373)o(cid:396)e (cid:448)e(cid:396)(cid:271)al, i(cid:374)depe(cid:374)de(cid:374)t (cid:895) First 3 years- explosive growth and development. Infants head is gigantic compared to rest of body-> characteristic highlights the cephalocaudal and proximodistal principles of early growth and physical development. At 1 year- brain is 70% of its adult weight, but rest of body is only 10-20% of adult weight. Head becomes proportaionally smaller as child grows in height and lower parts of body develop. Sensory and motor development follow the same principle; infants see objects before they can control their torso, and they learn to use upper parts of body before lower parts. Boys and girls show similar patterns of growth; however boys are gnearlly a bit heavier and taller than girls.
