PSY BEH 11B Chapter Notes - Chapter 14: Neural Tube, Prenatal Development, Brainstem
7 Jun 2016
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Prenatal development: from conception to birth a. i. Critical genes turn on and produce chemical signals that induce a process of differentiation among the proliferating cells a. ii. 2. Embryo has three distinct cell types a. ii. 2. a. a. ii. 2. b. a. ii. 2. c. One develops into brain stem and spinal cord. Two that develop into the midbrain and forebrain a. iv. Mass of cells has grown to 1 inch and the heart has begun to beat a. iv. 2. Nervous system continues to grow, new nerve cells age generated at a rate that can approach 250,000 new cells per minute: the prenatal environment b. i. Environmental toxins, alcohol, cigarette smoke, x-rays, diseases b. ii. Characterized by both psychological problems (learning disorders and behavior difficulties) and physical abnormalities (smaller stature and a characteristic pattern of facial abnormalities) b. ii. 2. Infancy and childhood: physical and sensorimotor development in infancy and childhood a. i. When an object touches and infant"s palm, she closes her fist tightly around it a. ii.
