Chapter 11-Physical Develop Middle Childhood

Infants, Children, and Adolescents (6th Edition)

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    Chapter 11:    Physical Development in  Middle Childhood
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    Body Growth Gender differences become more apparent Girls slightly shorter and lighter than boys Girls develop slightly more body fat and boys have more  muscle  Lower portion of the body is growing fastest at this  age period 
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    Secular Trends in Physical Growth Changes in body size from one generation to the  next Due to a faster rate of physical maturation Improved heath and nutrition
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    Skeletal Growth Body’s bones lengthen and broaden, but ligaments  not firmly attached Primary teeth replaced with permanent teeth >50% of American school-age children have some  tooth decay, low-SES children have especially high  levels
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    Brain Development Brain weight increases by only 10%  White matter  increases steadily in regions  responsible for  consciousness, impulse control and planning; spatial abilities; improved communication between the two hemispheres Gray matter  declines due to synaptic pruning Lateralization  of cerebral hemispheres increases
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    Brain Development Neurotransmitters Chemicals that permit neurons to communicate  across synapses  Related to cognitive performance, social and  emotional adjustment, and ability to withstand stress  Androgens male sex hormones 
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Chapter 11-Physical Develop Middle Childhood - Chapter 11:...

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