PSYCH 250 Lecture Notes - Lecture 5: Face Perception, Phrase (Music), Sensory System
Document Summary
First 2 years is a time of rapid growth: Weight doubles by 4 months & triples by 1 year. 50% gain in height from birth to age 1. Head sparing when nutrition is poor, the brain keeps growing. Reduced risk of breast cancer & osteoporosis. A majority of sleep time is spent dreaming. By age 1, 80% sleep through the night. Sleep needs decline to just 12 hours per day by age 2. Crying peaks at 6 weeks before declining with maturation of the cns. Infants cry to communicate physical needs & in response to stimuli. Brain development is rapid & reflects experience. At birth, the brain is 25% its adult weight. By 2, the brain is 75% its adult weight. Rapid development of neural connections with 70% located in cerebral cortex. Key terms: transient exuberance & synaptic pruning. Transient exuberance rapid proliferation of new neural connections in infancy.
