PSYB20H3 Chapter Notes - Chapter 8: Traffic Collision, Saturated Fat, Canada Health Act
Document Summary
8 physical development and health in early childhood. Children grow rapidly between ages 3 & 6 but less quickly than during infancy and toddlerhood. At about age 3, children begin to take on the slender, athletic appearance of childhood. By the age of 3, the brain is approx. The density of synapses in the prefrontal cortex peaks at age 4: myelination of pathways for hearing is also complete by age 4. By age 6, the brain has attained about 95% of its peak volume. There are wide individual differences two healthy, normally functioning children of the same age could have as much as a 50% difference in brain volume. Sleep patterns change throughout the growing-up years, and early childhood has its own distinct rhythms such, by age 5, most children average about 11 hours of sleep at night and give up day time naps.
