PSYC 2500 Lecture Notes - Lecture 6: Synaptic Pruning, Malnutrition, Body Proportions
23 Nov 2016
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A birth: brain weighs 25% of an adult brain. By age 2: brain weighs 75% of an adult brain. Glial cells and neurons: protein in diet, form new synapses. Lose brain cells with age: synaptic pruning. Not all parts of the brain mature at the same time. Primary motor area; primary sensory area: these develop first in the brain. Mylenization: increase in mylenization = an increase in neurotransmission: children have shorter attention spans due to low amounts of mylenization. Cerebral lateralization: different hemispheres of the brain are responsible for different aspects. Right brain = creative; left brain = analytic. Growth: changes in height, weight (physical size) Development: a broader term, includes mind, emotion and body: continues throughout life. Principles of physical development: cephalocaudal, from the head down, proximodistal, form the torso outwards, differentiation, physical responses; from global to specific, growth occurs in spurts, growth pattern is influenced by environment.
