1. Physical Development in Late Adulthood
Chapter 18
Physical Development in Late Adulthood

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4. Life Expectancy and Life Span
Life span - the upper boundary of life, the maximum number of years an individual can live.
The maximum life span of human beings is approximately 120 years of age.
Life expectancy - the number of years that will probably be lived by the average individual born in a particular year.
The life expectancy of individuals born today in the U.S. Is 77 years.
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5. Variations in Life Span
Australia has the highest life expectancy today (80).
Afghanistan and Kenya have very low ones (47years).
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6. Variations in Life Span
Such differences are due to factors including health conditions and medical care.
The percentage of older adults varies across countries as well—16% of Sweden’s population is older than 65, 12% of the U.S. population, and only 3% in Kenya.
In the U.S. a 7-year gap exists between life expectancy of Whites (77) and African Americans (70).
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7. Centenarians
In 1980 there were only 15,000 centenarians in the U.S.; in 2000 there were 77,000.
It is projected that this number will increase to 834,000 in 2050.
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8. Centenarians
Research reveals that many centenarians are quite healthy in their old age.
Centenarians are a robust group, as many have had difficult lives.
Such rapid growth in the older population will most likely lead to a variety of societal changes.
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9. Sex Differences in Longevity
Today, life expectancy for females is 80, males 74.
Beginning at age 25, females outnumber males, and the gap continues to grow.
By the time adults are 75 years of age, more than 61% of the population is female.
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10. Sex Differences in Longevity
These differences are due to health attitudes, habits, lifestyles, and occupation.
Biological factors play a role, too, as females outlive males in virtually all species.
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11. The Young Old, the Old Old, and the Oldest Old
Late adulthood has the longest span of any period of human development—50-60 years.
Developmentalists thus distinguish between subperiods in this stage, although definite age boundaries are not yet agreed upon.
The young old are years of age.
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12. The Young Old, the Old Old, and the Oldest Old
The old old are 75 years and older.
Some distinguish the oldest old as 85 years and older.
Many experts prefer to make the distinction based on functioning, rather than age.
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13. The Oldest Old The oldest old are much more likely to be female.
They have a much higher rate of morbidity and a greater incidence of disability than the young old.
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14. The Oldest Old
They are much more likely to be living in institutions, less likely to be married, and more likely to have low educational attainment.
A substantial portion function effectively, and the majority continue to live in the community.
Forty percent say they have no activity limitation.
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15. Biological Theories of Aging
Cellular Clock Theory
Free-Radical Theory
Hormonal Stress Theory
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16. Cellular Clock Theory
Leonard Hayflick’s view that cells can divide a maximum of about times and that, as we age, our cells become increasingly less capable of dividing.
Thus, Hayflick places the upper limit of the human life span at about 120 years.
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17. Cellular Clock Theory
Recent research has shown that telomeres are DNA sequences that cap chromosomes, and that each time a cell divides, telomeres become shorter and shorter.
Age-related telomere erosion has been found to be linked with an impaired ability to recover from stress and an increased rate of cancer formation.
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18. Free-Radical Theory
States that people age because inside their cells normal metabolism produces unstable oxygen molecules known as free radicals.
These molecules ricochet around the cells, damaging DNA and other cellular structures.
This damage can lead to a range of disorders, including cancer and arthritis.
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19. Hormonal Stress Theory
Aging in the body’s hormonal system may lower resilience to stress and increase likelihood of disease.
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20. Hormonal Stress Theory
With age, hormones stimulated by stress that flow through the hypothalamic-pituitary-adrenal system remain elevated longer than when we were younger.
These prolonged, elevated levels of stress-related hormones are associated with increased risks for many diseases including heart disease and cancer.
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22. The Aging Brain
Recent research has shown that adults continue to grow new brain cells throughout their lives.
Even in late adulthood, the brain has remarkable repair capability.
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23. The Aging Brain
Growth of dendrites has been observed to continue through the 70s.
Brain activity of older and younger people were compared; it was observed that older brains literally rewired themselves to compensate for losses.
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24. Conclusions about Older Brains
It appears that aging brains can shift responsibilities for a given task from one region to another.
Neuroscientists believe the brain has a remarkable capacity to change and grow, even in old age.
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25. Conclusions about Older Brains
Stimulating the brain with mental exercises may cause neurons to increase their dendritic branching.
These findings offer new possibilities for preventing and treating brain diseases such as Alzheimer’s and stroke.
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26. Physical Appearance
The changes that take place in middle adulthood become more pronounced in late adulthood.
The changes are most noticeable in the form of facial wrinkles and age spots.
We get shorter when we get older.
Our weight usually drops after we are 60, most likely due to muscle loss, which causes us to look “saggy.”
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27. Sensory Development Vision Hearing Smell and Taste Touch and Pain
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28. Vision
Any decline in vision that began in early or middle adulthood becomes more pronounced.
Night driving is particularly difficult.
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29. Vision Dark adaptation is slower. Visual field becomes smaller.
A recent study discovered that sensory acuity, especially in vision, was related to whether and how well elderly adults bathed and groomed themselves, completed chores, engaged in intellectual activities and watched TV.
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30. Other Vision Problems Cataracts Glaucoma Macular Degeneration
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31. Hearing
Hearing impairment may begin in middle age, but doesn’t become an impediment until late adulthood.
Seventy-five percent of individuals aged experience some type of hearing problem.
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32. Hearing Fifteen percent of those over 65 is legally deaf.
This hearing loss is usually due to the degeneration of the cochlea, the primary neural receptor for hearing in the inner ear.
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33. Smell and Taste
Most older adults lose some of their sense of smell, taste, or both.
Smell and taste losses often begin around 60 years of age.
Many older adults often prefer highly seasoned foods to compensate for their diminished senses.
This may lead to eating more nonnutritious, highly seasoned junk food.
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34. Touch and Pain
Studies have shown that with aging, individuals could detect touch less in the lower extremities than in the upper extremities.
For most older adults, this decline is not a problem.
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35. Touch and Pain
Older adults are less sensitive to pain and suffer from it less than younger adults.
This can be harmful if it masks injury and illness that need to be treated.
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36. The Circulatory System
When heart disease is absent, the amount of blood pumped through the heart is the same regardless of an adult’s age.
Some experts argue that the healthy heart may even become stronger as we age through the adult years, with capacity increasing, not decreasing.
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37. The Circulatory System
Illness, obesity, anxiety, stiffening of blood vessels, or lack of exercise may cause blood pressure to rise with age.
High blood pressure should be treated.
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38. The Respiratory System
Lung capacity drops 40% between the ages of 20 and 80, even without disease.
Lungs lose elasticity, the chest shrinks, and the diaphragm weakens.
Diaphragm-strengthening exercises can improve lung functioning.
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39. Sexuality
In a study of more than 1,200 elderly people, almost 30% had participated in sexual activity in the past month.
In the absence of disease, sexuality can be lifelong, though aging does induce some changes.
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40. Sexuality
Orgasm becomes less frequent in males, and more direct stimulation is needed for erection.
When intercourse is impaired by infirmity, closeness and sensuality needs persist.
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42. Health Problems Causes of Death in Older Adults Arthritis Osteoporosis
Accidents
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43. Causes of Death in Older Adults
Heart Disease
Cancer
Stroke
Chronic Lung Diseases
Pneumonia
Influenza
Diabetes
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44. Arthritis
Inflammation of the joints accompanied by pain, stiffness, and movement problems.
Arthritis is especially common in older adults.
This disorder can affect hips, knees, ankles, fingers, and vertebrae.
There is no known cure for arthritis, but symptoms can be reduced by drugs, range-of-motion exercises, weight reduction, and joint replacement.
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45. Osteoporosis
An aging disorder involving extensive loss of bone tissue.
The main reason many older adults walk with a marked stoop.
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46. Osteoporosis
Women are especially vulnerable to osteoporosis, the leading cause of broken bones in women.
Afflicts two-thirds of women over age 60.
Related to deficiencies in calcium, vitamin D, estrogen depletion, and lack of exercise.
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47. Prevention and Treatment
Eat foods rich in calcium, get more exercise, and avoid smoking.
Estrogen replacement therapy may also be recommended for high-risk individuals, except those with a history of breast cancer.
Certain drugs can be used to reduce the risk.
Older women should also get bone density checks.
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48. Accidents The seventh leading cause of death for older adults.
Injuries resulting from a fall at home or during a traffic accident are common.
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49. Accidents
Each year, approximately 200,000 adults over the age of 65 fracture a hip in a fall.
Half of these adults die within 12 months, frequently from pneumonia.
One study showed an exercise program reduced the risk of falls in elderly adults.
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50. The Robust Oldest Old
The oldest old are a heterogenous group, a diversity that is just now being recognized.
A large portion of the oldest old not only do not require personal assistance on a daily basis, but also are physically robust.
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51. The Robust Oldest Old
In one study, about three-fourths of the robust older adults had no hospitalizations and had fewer than six doctor visits in the previous 12 months.
The majority of the oldest old live in the community and remain independent.
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52. Exercise
Older adults are healthier and happier the more active they are.
In a study of over 17,000 men and women, sedentary participants were more than twice as likely to die during the 8-year study as moderately fit participants.
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53. Exercise
Another study showed that starting a moderately vigorous sports activity from the 40s through the 80s was associated with a 23% lower risk of death.
Gerontologists recommend strength training too.
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54. Nutrition and Weight
Evidence shows food restriction in lab animals can increase life span.
Animals fed restricted diets live as much as 40% longer than animals given unlimited food access.
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55. Nutrition and Weight
Diet restrictions also delay biochemical alterations that contribute to poorer health and aging.
Leaner men live longer, healthier lives.
Current research is exploring the link between body mass index and longevity in women.
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56. The Growing Vitamin and Aging Controversy
Research shows antioxidants—vitamin C, vitamin E, betacarotene—help slow the aging process and improve the health of older adults.
Antioxidants counteract the cell damage caused by free radicals.
No evidence shows antioxidants can increase the life span, but some experts believe they can reduce one’s risk of becoming frail and sick in later years.
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57. The Growing Vitamin and Aging Controversy
We still don’t know which vitamins should be given and in what doses.
Research has primarily been correlational, thus the effects of vitamins versus better health practices are not known.
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58. Health Treatment Care Options
Giving Options for Control and Teaching Coping Skills
The Older Adult and Health-Care Providers
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59. Care Options
Only about 5% of adults age 65 and over reside in a nursing home; 23% of adults 85 and older live in nursing homes or other extended care facilities.
Due to nursing home care costs , gerontologists believe alternatives need to be considered.
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60. Care Options
Alternatives include home health care, day-care centers, and preventive medicine clinics.
They are cheaper and less likely to engender feelings of depersonalization and dependency.
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61. Giving Options for Control
Having a sense of personal control is found to be important both physically and psychologically.
Ellen Langer argues that it is extremely important for aging individuals to understand that they can choose the way they think.
She has shown one reason people act old is that they base their actions on mental images of stereotypic old people.
When people were induced to think of themselves as younger, they showed many outward changes and had a more positive outlook on life.
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62. Teaching Coping Strategies
Being in control reduces stress and stress-related hormones.
Nursing home residents were given assertiveness training and learned time management skills.
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63. Teaching Coping Strategies
Their subsequent levels of cortisol were greatly reduced and remained lower 18 months after training.
The residents were also healthier and had reduced need for medication, compared to residents without training.
Training changed their behavior and improved health.
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64. The Older Adult and Health-Care Providers
Attitudes of both health-care provider and older adult are important aspects of the older adult’s health.
Too often, health-care providers share society’s stereotypes and negative attitudes toward the elderly.
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65. The Older Adult and Health-Care Providers
In health care, these attitudes can take the form of avoidance, dislike, and begrudged tolerance, rather than positive, hopeful treatment.
Older patients tend to take a less active role in medical encounters with health-care providers.
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