PSY 2301 Chapter Notes - Chapter 4: Circadian Rhythm, Primitive Reflexes, Reticular Formation
16 Mar 2018
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Chapter 4: physical, sensory, and perceptual development in infancy. First 2 years of life is the greatest physical change. Medulla and midbrain most fully developed at birth. Many neurons, glial cells, and synapses have begun to form at birth (synaptogenesis) Infants have more unused synapses than adults so they can come back from injury more easily- plasticity. Infants in highly stimulating environments have a dense network of neurons, dendrites, synapses. Changes in psychological functioning is due to changes in the brain, not experiences. Myelination occurs in neck and shoulders before abdomenbabies can control their head before rolling over. Primitive reflexes (getting scared, twitching if touched) disappear after 6-8 months. Different criesincrease the first 6 weeks and then declines. Babies are awake for 2-3 hours a day. Growth, motor skills, and developing body systems. Half of the growing happens before 2 years old. Height at 2 is half of what you"ll be when you reach maturity.
