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20 Cards in this Set
- Front
- Back
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What is the size of an infant's brain?
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1/4 of their length is their head, so it's pretty big. It's about 1/4-1/3 the size of an adult brain.
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What connects neurons?
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Axons and dentrites
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Neuron integration
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the process by which neurons coordinate the activity of a muscle group
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Differentiation
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neurons take on specific and specialized function
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Cell death
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normal elimination of excess cells. About 50% of newborn cells die off.
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Myelination
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Fatty substance begins to cover axon to insulate it, making it more efficient. MS is the breakdon of this substance.
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Moro reflex
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After loud noise, baby stretches out arms and legs and arches back
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Darwinian reflex
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baby grasp after hand is stroked
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Tonic neck
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when baby is laid down on its back, it assumes fencer position.
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Babkin reflex
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Both palms stroked at once. Then eyes close, mouth opens, neck bends and head tilts forward.
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When do most reflexes disapper?
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4 months.
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What can babies taste while still in the womb?
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Sweet, sour, bitter
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What can fetus hear?
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Mother's hearbeat, beating rate and voice. At birth she has a preference for mother's voice.
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Auditory discrimination
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Can distinguish women's from men's voices (prefer women).
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Habituation
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Baby doesn't react to familiar things. This aids in testing babies by comparing reaction to dishabituated things.
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Sight
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Not very good. By 3rd month they have depth perception. Can perceive color.
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At what age can baby hold head up?
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4 months
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Define ages of locomotive development
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at 3 months can roll over, at 6 months can sit up, from 6 to 10 months baby crawls. Can be frustrating as baby learns because she wants to be independent.
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What are fetal fatality rates?
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More than 1/2 occur during the first week and 2/3 during the first four weeks.
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What are some causes of SIDS?
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Heart problems, serotonin levels in brain, unable to breath while sleeping.
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