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Lecture 14

PSYC 2250 Lecture 14: Lecture 14

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PSYC 2250
Steven Hladkyj

lc982 Development of nervous system is followed by internal structures then external structures The Fetal Stage 2 months to birth final and longest phase of prenatal development, the period of the fetus Organs, muscles and nervous system organizes and become connected Vernix skin thickens and is covered with a thick, greasy substance called vernix, which protects fetus during its long bath in amniotic fluid th Fetus responds to sounds at 25 week and discriminates familiar and unfamiliar sounds by 32 nd or 33 rd week Viability 3 rd trimester Fetus puts on weight Fetal Brain Development Neurons begin to develop in the embryonic stage In fetal stage neurons proliferate Neuronal migration Growth of dendrites are sensitive to prenatal environment Glial cells form Sex Differences in Prenatal Development 6 weeks prenatal develop sex hormones or secreted Testosterone has a masculinizing agent Females have faster bone development and are ahead of boys by 4 to 6 weeks at time of birth Boys tend to be heavier and longer with muscle and less fat than girls
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