The document discusses brain and motor development in infancy. It notes that the brain grows rapidly during this period through neuronal growth and pruning. Sensitive periods exist when the brain is most influenced by environmental stimuli. Motor skills develop from basic reflexes to coordinated movements as large and small muscle groups are used. Nutrition impacts development, as malnutrition can harm cognitive and physical growth. The five senses are functional from birth, with vision and hearing especially developed to prefer certain stimuli.

1. Infancy (Part 1)