ch 17 - CH 17: PHYSICAL & COGNITIVE DEVELOPMENT IN LATE...

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LIFE EXPECTANCY Functional age – actual competence and performance Biological and physical differences Average life expectancy – the number of years that an individual born in a particular year can expect to live, starting at any given age Women have 4-7 more years than men Average healthy life expectancy – how long you live w/o illness, injury Activities of daily living – (ADLs) basic self-care tasks required to live on one’s own Bathing, dressing, getting in and out of bed or chair, eating After age 75, 9% cannot carry out ADLs Instrumental activities of daily living – (IADLs) tasks necessary to conduct the business of daily life and also requiring some cognitive competence Telephoning, shopping, food preparating, housekeeping, paying bills Maximum lifespan – genetic limit to length of life for a person free of external risk factors Average age is 85 PHYSICAL CHANGES Nervous System Brain weight declines / loss of neurons Diminished central nervous system Autonomic NS
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Heat waves / cold spells Release higher stress hormones arouse body tissues that are less responsive Sensory Systems Vision Cataracts – cloudy area in lens Foggy vision, eventually blindness without surgery Muscular degeneration – light-sensitive cells break down Vision blurs and is eventually lost Hearing Declines Lower self-efficacy, lonely, depressed, smaller social network Taste Reduce sweet, salty, sour, bitter – after age 60 Affected by smoking, dentures, medications, environment pollutants Food is less attractive Smell Difficulty detecting gas fumes, rancid food, smoke Odor sensitivity due to decrease in smell receptors Touch Loss of touch receptors in fingertips
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Less blood circulation in extremeties Hard to read Braille CARDIOVASCULAR AND IMMUNE SYSTEM CHANGES Cardiovascular System Heart muscles become rigid, some cells die/some enlarge – walls of left ventricle
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This note was uploaded on 01/04/2012 for the course PSY 231 taught by Professor Limegrover during the Fall '08 term at Miami University.

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ch 17 - CH 17: PHYSICAL & COGNITIVE DEVELOPMENT IN LATE...

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