CPChapter5 - Chapter Five The Childs Growth Brain Body...

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4/7/11 Chapter Five The Child’s Growth: Brain, Body, Motor Skills, and Sexual Maturation
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4/7/11 Brain Development in At birth: Brain weight is about 25% of adult brain; 75% at 2 years of age Largest portion of brain is cerebrum , covered by the cerebral cortex – the control for complicated human traits and specific functions Neurons and synapses Most of brain’s neurons are present, the result of neuron proliferation
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4/7/11 Concentrating, planning, problem solving Language structure Motor cortex Sensory cortex Primary visual Language comprehension Interpreting experiences Primary hearing Occipita l lobe Parietal lobe Frontal lobe Tempor al lobe
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4/7/11 Brain Development in Neurons and synapses Most myelination of brain occurs in first 2 years of life Neural migration ensures all parts of the brain are served by neurons Synaptogenesis : forming of synapses causes neural death Synaptic pruning frees up
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4/7/11
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4/7/11 6 years old 14 years old At birth Synaptic Pruning
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4/7/11 Brain Development in Sequential development of the brain Orderly sequence during infancy Voluntary movements begin replacing reflexes Hemispheric Specialization 2 Hemispheres connected by corpus callosum Lateralization describes brain specialization- how speech sounds
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4/7/11 Brain Development in Hemispheric Specialization Theories of lateralization underlie explanations for dyslexia in children; similar disorders have multiple origins: may not show normal lateralization- using both brain sides Handedness is genetic Brain Plasticity Experiences influence brain development
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