PSYC 581 Chapter Notes - Chapter 8: Sulfur Dioxide, Limbic System, Cortisol
Document Summary
By age 6: 3ft. tall, 40-50 lbs, looks lean, not chubby, adult-like proportions (especially legs, ethnic differences play a role, e. g. in height: african american > europeans > Zinc growth + immune system, production of hormones. Food allergies: often to healthy foods. Oral health: too much sugar, too little fiber. Affects formation of permanent teeth: reasons for poor dental care: Obsessions: normal for this age, age-dependent, obsessive-compulsive behaviors not uncommon. Brain development: extensive sprouting/pruning before age 2. Age 2 75% of adult weight. Age 6 90% of adult weight: prefrontal cortex matures: Increase in speed of thought: extensive myelination (quicker information processing) Decrease in speed of thought: age-related. Corpus callosum: nerve fibers, connects left and right hemispheres. Lateralization: specialization by each side of the brain. Handedness: partially genetic, by age 2: prefer left or right-handed, advise against switching, distinction exaggerated: no exclusive sidedness in people, both sides in brain included in almost every skill.
