Ch4 Infant Dev BB Sp 12-1

Ch4 Infant Dev BB Sp 12-1 - Chapter 4 First Adaptations:...

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Chapter 4 First Adaptations: Infant Development Alexandra Jordana Singer Born November 20, 2008
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Newborns are ___________ to face the developmental tasks of learning about the world and forming relationships within it 5 important characteristics of newborn competencies: Depend on prewired abilities built into the nervous system Often meet survival needs Organized sequences of actions serve a purpose Involve selective responses Newborn Development
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Newborn head and brain size are closer to adult size than any other body parts What principle does this exemplify? Newborns usually double their birth weight in the first 4 months At birth, brain is ¼ of its adult weight Newborn Development
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Early Brain Development Developmental Timetable Brain Part When Function Spinal cord and brainstem Ready for use at birth Basic reflexes and survival functions Thalamus, cerebellum, hippocampus Continually develops and reorganizes (beyond infancy) Sensory relay, motor functions, memory formation Cerebral cortex Longest period of continued development (beyond infancy) Higher cognitive functions
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Early Brain Development Developmental Processes Formation: neurogenesis and neuron migration Structures for Connections and Specificity: s tructural elaboration (dendrites and axons) and differentiation of neurons Connections: formation of connections between neurons (synaptogenesis) Support/Nourishment for Neurons: g lial cells and myelination Interdependability: i ncreasing connections Decrease in Plasticity: p runing of excess synapses
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Reflex: _____________________________________ Purpose of reflexes Reflexes
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Types of Infant Reflexes Sucking When object brushes lips, rhythmic sucking occurs Babkin When lying down, pressure on both palms causes head to turn, mouth to open, eyes to close
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Ch4 Infant Dev BB Sp 12-1 - Chapter 4 First Adaptations:...

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