PSY 302 Lecture Notes - Lecture 2: Umbilical Cord, Plantar Reflex, Swallowing
22 Jan 2018
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Document Summary
Chapter 2 prenatal development and the newborn period. Prenatal development: the period of the zygote (week 1-2, the period of the embryo (week 3-8, the period of the fetus (week 9-birth) Germinal period (the period of zygote: 0-2 weeks, zygote (fertilized human egg, time from conception to implantation, about 25% survival rate. Embryonic period (the period of embryo: 3 8 weeks, implantation, gastrulation; neural tube, supporting system: placenta; umbilical cord; amnioticsac. Fetal period (the period of fetus: 9th week-birth, fetus, last 3 months: rapid growth of body & brain. Sensory structures are present relatively early in prenatal development: hearing: responds to sounds (6th month of gestation, touch: tactile stimulation of own activity, smell: smell amniotic fluid, vision: limited, but will orient to external light. At birth preferences for smells and tastes that are familiar because of prenatal exposure. Learning and memory (32 weeks of gestation: nova video.
