Biology 4611F/G Chapter Notes - Chapter 12: Visual Acuity, Prenatal Development, Primitive Reflexes
23 Jul 2015
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How do they interact: critical and sensitive periods, are some experiences especially important at particular ages, critical period: Age range in which certain experiences must occur for development to proceed normally or along a certain path: sensitive period: Developmental functions: no change, ability to discriminate high-low pitched sounds, continuous change (continuity, certain types of intelligence, stages (discontinuity, motor development, shift from rolling to crawling to walking, etc. Inverted u-shaped function: separation anxiety, visual acuity, u-shaped function, newborns turning toward off centred sound. Prenatal development: prenatal development consists of three stages, germinal stage first two weeks of development when one sperm fertilizes a female egg (ovum). Through repeated cell division the zygote becomes a mass of cells that attaches to the mother"s uterus about 10-14 days after conception: embryonic stage second week through the eighth week after conception. This cell mass is now called an embryo. Placenta and umbilical cord develop at this stage.
