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Lecture 18 Midlife Physical and Cognitive Dev 2011 student slides

Lecture 18 Midlife Physical and Cognitive Dev 2011 student slides

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Physical and Cognitive Development in Middle Adulthood Lecture 18 March 30, 2011
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Outline Introduction to Midlife  Physical changes Brain plasticity continues Cognitive development in midlife Postformal thought Intelligence Maintaining cognitive function
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Introduction to Midlife Age range:  40-65 Declines in physical functioning Rates of mental disorders  Peaks in twenties  Declines with middle age  Happiness increases Increased influence in career and  increased income
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Physical Changes in Middle Adulthood: Vision Accommodation  of the eye (ability  to focus and maintain an image on  the retina)  experiences a sharp  decline betw 40-59 Results from weakening of muscle & growth in size of lens Leads to difficulty viewing close objects Size of pupil shrinks and lens  yellows Limits ability to see in dim light Limits color discrimination Reduced blood supply may decrease  size of visual field and increase eye’s  blind spot
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Physical Changes in Middle Adulthood cont. Hearing An estimated 14%-25% of American adults betw  45 and  64 have a hearing loss Hereditary and age-related declines (certain experiences,  being in very loud/noisy environments)  Decline typically starts with a loss at  high frequencies  (hard to separate out background noise) Men’s hearing declines earlier and at a faster rate than  women’s
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Physical Changes in Middle Adulthood cont. Weight and Body Dimensions Middle-age spread - slowed metabolism - increase in  body fat & loss of lean body mass (muscle and bone)  Gradual loss in bone mass & density –  makes bones  weaker Disks in spinal column move closer - shrinkage
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Sex l Men reach their sexual peak in their twenties By midlife: § Ejaculation becomes less intense for men §
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