Lecture 4 - 08.04.10

Lecture 4 - 08.04.10 - 08.04.10 Psych 130 Lecture 4...

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08.04.10 Psych 130 – Lecture 4 Prenatal Development Question Why should developmental psychologists care about prenatal development? o It establishes the building blocks on which the rest of your life will be based. o From a biological standpoint, the most developmental change happens prenatally. You will never change the same amount in the same amount of time. The Beginnings of Life – Birth and the Newborn Infant Neonates have a few important reflexes already o Blink reflex – if you make a loud noise or shine a bright light, the baby will blink. o Moro – a baby throws its arms out and then inward (as if embracing) in response to loud noise or when its head falls. o Palmar – a baby grasps an object places in the palm of its hand. o Rooting – when a baby’s cheek is stroked, it turns its head toward the cheek that was stroked and opens its mouth. o Sucking – a baby sucks when an object is placed in its mouth. All of these reflexes are based in the baby’s need to survive. Prenatal Development – Key Terms Trimester – three months during gestation Zygote – tiny clump of cells in weeks 1-2 Embryo – week 3-8 o Circulatory system, primitive CNS, mouth Foetus Neural tube – clump of cells which over time becomes flattened and little ridges fold up and create the neural tube down the back of this flat mass of cells. This tube develops the CNS. o Spina Bifida – when the neural tube fails to close. Hopefully mothers ingest a lot of folic acid which help develop the CNS of the baby. Cephalocaudal – head to toe development. This is also very interesting in postnatal development because there is top heavy functioning followed by functioning in the lower parts of the body. It also happens in this central to outward way in both prenatal and postnatal development. We have more gross motor activity than fine motor activity. Proximodistal (midline to outward) C-shaped development of the brain The Embryo After implantation, the inner cell mass becomes the embryo and the rest of the cells develop into its support system. The
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This note was uploaded on 03/07/2011 for the course PSYCH 130 taught by Professor Johnson during the Spring '08 term at UCLA.

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Lecture 4 - 08.04.10 - 08.04.10 Psych 130 Lecture 4...

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