PSYC 241 Lecture Notes - Lecture 6: Neurogenesis, Teratology, Amniocentesis
Document Summary
Psych 241 lecture 6: periods of prenatal development, prenatal assessments, hazards to prenatal development, birth, low birth weight and preterm infants, post-partum care, http://www. youtube. com/watch?v=fkyljukbe70, min 2-6. Placenta: interchange point: both mom"s & baby"s tissue meet but don"t directly mix; like a filter. At birth, babies have approximately 100 billion neurons. 3 trimester 2 years of postnatal life. Anencephaly (if top doesn"t close) & spina bifida (if bottom doesn"t close) if neural tube doesn"t close. Neurogenesis -- 5 weeks, up to 200,000 neurons formed per minute. Uses high frequency sound waves and digital image processing. Use an ultrasound, syringe, extract amniotic fluid. Ideal for testing problems with the cns and abnormalities with the placenta. 10-15% of couples in us deal with infertility (2 million couples) Cause could be due to woman or man. Teratogen: any agent that can cause birth defects. Nicotine: can result in preterm births and underweight, increased risk for adhd.
