Late Adulthood Physical Development Chapter 23 Human Development

Late Adulthood: Physical Development Chapter 23 Human Development & Learning

Prejudice and Predictions Ageism Elderspeak ◦ A prejudice in which people are categorized and judged solely on the basis of their chronological age. ◦ Considers people as part of a category and not as individuals, can target people of any age. ◦ A condescending way of speaking to older adults that resembles baby talk, with short, simple sentences, exaggerated emphasis, repetition, and a slower rate and higher pitch than normal speech.

Believing the Stereotype The Elderly’s View of Ageism • Ageism becomes a self-fulfilling prophecy. • Stereotype threat can be as debilitating for the aged as for other groups.

Gerontology and Geriatrics Gerontology ◦ The multidisciplinary study of old age. Geriatrics ◦ The medical specialty devoted to aging.

The Demographic Shift Demographic shift ◦ A shift in the proportions of the population of various ages ◦ In 2010, 8% of world’s population was over 65 (up from 2% 100 years ago) ◦ Only 4 times as many children as elders. Centenarians ◦ People aged 100 years or more ◦ The fastest-growing age group

The Demographic Shift Demographic pyramid • A graphic representation of population as a series of stacked bars in which each age cohort is represented by one bar, with the youngest cohort at the bottom.

The Demographic Shift Three reasons for traditional pyramidal shape 1. Far more children were born than the replacement rate 2. Before modern sanitation and nutrition, many children died before age 5 3. Middle-aged people rarely survived adult diseases like cancer and heart attacks Fewer babies and more elders means countries’ demographic stacks become rectangles rather than triangles, as in Germany, Italy, and Japan.

Old, Older, and Oldest Young-old (70%) Old-old (20%) Oldest-old (10%) ◦ Healthy, vigorous, financially secure older adults (those aged 60 to 75) who are well integrated into the lives of their families and communities. ◦ Older adults (those aged 75 to 85) who suffer from physical, mental, or social deficits. ◦ Elderly adults (those over age 85) who are dependent on others for almost everything, requiring supportive services such as nursinghome care and hospital stays.

Primary and Secondary Aging Primary aging ◦ The universal and irreversible physical changes that occur to all living creatures as they grow older. Secondary aging ◦ The specific physical illnesses or conditions that become more common with aging but result from poor health habits, genetic vulnerability, and other influences that vary from person to person.

High Blood Pressure and Cardiovascular Disease The Cardiovascular Health Study • Participants: More than 5, 000 people over age 65 in the U. S. without coronary problems. • Six years later, some participants had developed heart disease. • The likelihood of CVD was strongly related to six risk factors (all more common with age): Diabetes Smoking Abdominal fat High blood pressure Lack of exercise High cholesterol

High Blood Pressure and Cardiovascular Disease Cardiovascular disease Disease that involves the heart and the circulatory system

Facts about CVD is considered secondary aging because not everyone develops it. No single factor (including age, hypertension, inactivity, and smoking) makes CVD inevitable. The links among aging, risk, and CVD are undeniable. ◦ A 90 -year-old is 1, 000 times more likely to die of CVD than is a 30 -year-old, even if both have identical genes, social contexts, and health habits ◦ Less than half those over age 65 have CVD, diabetes, or dementia but almost everyone has at least one of these three by age 90. ◦ Risk factors and diseases of the aged are not distributed randomly: If a person has one risk factor, it is likely that he or she has several.

Selective Optimization with Compensation Individual Compensation: Sleep ◦ Older adults spend more time in bed, take longer to fall asleep, wake up more often, and feel drowsy in the daytime more often. Social Compensation: Driving ◦ Older adults drive more slowly, may not drive at night or when there is bad weather and may give up driving altogether.

Selective Optimization with Compensation Theory Selective optimization with compensation theory -- successful aging is linked with three main factors: selection, optimization, and compensation ◦ selection -- older adults have a reduced capacity and loss of functioning ◦ optimization -- it is possible to maintain performance in some areas through practice and use of new technologies ◦ compensation -- becomes relevant when life tasks require a level of capacity beyond the current circumstances Effective when people pursue successful outcomes. ◦ Example: Arthur Rubinstein, noted pianist (Baltes, 2003)

Compression of Morbidity • A shortening of the time a person spends ill or infirm before death; accomplished by postponing illness. • Due to improvements in lifestyle, medicine, and technological aids. • North Americans who live to be 95 are likely to be independent almost all of those years

The Effects of Falling With age, bones become more porous, losing calcium and strength. This can lead to osteoporosis where bones can be broken easily. Most common liability elders experience from falling is fear so they reduced their activity which caused them to become sicker.

The Senses Senescence is pervasive and inevitable • Obvious in appearance (skin gets wrinkled, bodies change shape) and the senses. • Only 10% of people over age 65 see well without glasses. • Taste, smell, touch, and hearing are also impaired (e. g. , by age 90, the average man is almost deaf, as are about half of the women).

The Senses Technology and Sensory Deficits: Technology can compensate for almost all sensory loss. Visual problems: ◦ Brighter lights and bifocals or two pairs of glasses are needed. ◦ Cataracts, glaucoma, and macular degeneration can be avoided or mitigated if diagnosed early. ◦ Elaborate visual aids (canes that sense when an object is near, infrared lenses, service animals, computers that “speak” written words) allow even the legally blind to be independent.

The Senses

The Senses Auditory problems: • Small and sensitive hearing aids are available but many people still hesitate to get aids. • Missing out on bits of conversation cuts down on communication and precipitates many other social losses. • Younger people tend to yell or use elderspeak, both of which are demeaning. • Elderly people are less vulnerable to stereotype threat if they have positive interactions with the younger generations.

The Society and Sensory Loss A passive acceptance of sensory loss increases morbidity of all kinds. Problems: • It is often difficult to individualize available technology. • Ageism is inherent in the design of everything from airplane seats to shoes. • Many disabilities would disappear if the environment were better designed.

Theories of Aging Wear and Tear ◦ A process by which the human body wears out due to the passage of time and exposure to stressors. Genetic clock ◦ A mechanism in the DNA of cells that regulates the aging process by triggering hormonal changes and controlling cellular reproduction and repair.

How Long Can Humans Live? Maximums and Average Maximum life span Average life expectancy ◦ The oldest possible age to which members of a species can live, under ideal circumstances. For humans, that age is approximately 122 years. ◦ The number of years that the average person in a particular population is likely to live. ◦ In the U. S. today, average life expectancy at birth is about 75 years for men and 81 years for women. ◦ Dramatic variations from nation to nation

Cellular Aging Oxygen free radicals ◦ Atoms of oxygen that have an unpaired electron and which can, over time, cause cancer, diabetes, and arteriosclerosis Antioxidants ◦ Chemical compounds that nullify the effects of oxygen free radicals by forming a bond with their unattached oxygen electron.

Free Radical Theory People age because as cells metabolize energy, the byproducts include unstable (at least one unpaired electron) oxygen molecules known as free radicals The free radical (unstable molecule) now goes around the cell stealing electrons from other healthy molecules. ◦ free radicals damage DNA ◦ resulting damage can lead to range of disorders such as cancer and arthritis ◦ Free radicals can be neutralized by antioxidants. (Mariani & others, 2005; Rodigo & others, 2005)

Free radicals continued Free radicals are a natural byproduct of bodies at work, but they can be increased by external forces: Smoke, alcohol, unhealthy foods, too much sun exposure, even medications including Tylenol. Antioxidants are natural plant chemicals, found in our foods especially in fruits, vegetables, whole grains, nuts and beans. (c) 2008 The Mc. Graw-Hill Companies, Inc.

The Immune System B Cells ◦ Immune cells made in the bone marrow that create antibodies for isolating and destroying bacteria and viruses. T Cells ◦ Immune cells made in the thymus gland that produce substances that attack infected cells in the body.

Replication No More Hayflick limit ◦ The number of times a human cell is capable of dividing into two new cells Telomeres ◦ The ends of chromosomes in the cells Telomerase ◦ Enzyme that increases the length of telomeres Calorie restriction ◦ Slows down aging

(c) 2008 The Mc. Graw-Hill Companies, Inc.

The Centenarians Lifestyles that promote old age: Diet: little meat or fat (our understanding of the relationship between fat and health is changing) Work: even the old do work Family and community: well integrated into family and community Exercise and relaxation: most walk often, nap, and socialize