PSYC101 Lecture 4: HUMAN DEVELOPMENT
Document Summary
Parental development (cid:374)atal = "pertai(cid:374)i(cid:374)g to (cid:271)irth or origi(cid:374)(cid:863: union of sperm and egg creates zygote. Single-celled organism from which all other cells develop. Prenatal period comprised of 3 stages: germinal (first 2 weeks) Implantation of cell mass into uterine wall: duration: 1 week, many zygotes rejected. Formation of placenta: exchange system between mother and fetus, oxygen and nutrients, bodily waste months) Formation of physiological structures: heart, spine, brain. Sensitive period of development: environment impacts harmful, miscarriage, beginning to look human. Formation of muscle and bone: capable of physical movement, organs function. Threshold of viability (23-26 weeks: age at which baby can survive premature birth (subject of much debate) 8 to 9 months fetuses can response to stimuli. Fetal habituation method (e. g. , dirix et al 2009: relies on fetal acoustic stimulation. Every 30 seconds, 1 second vibroacoustic stimulus (vas: monitor vas-elicited fetal responses, no response after 4 vas = habituation. Provides the following measures and results (dirix et al, 2009):
