Psychological and Physiological Aspects of Aging: Geriatrics and Advanced Old Age

Geriatrics and the Aging Process

Definition and Scope

Geriatrics is the medical specialty focused on the health and care of older adults, encompassing biological, psychological, physiological, and sociological aspects of aging. The term senescence refers to the period when the body begins to age and weaken, marking the final stage of the lifespan. Old age is often defined as age 65 and above, but modern gerontologists categorize it as:

• Early-old: 60–75 years

• Middle-old: 76–90 years

• Late-old: 90 years and older

As people live longer and health care improves, these categories are evolving. Geriatrics aims to maximize independence and shorten periods of illness and disability.

Anticipated Increase in Advanced Old Age Population

• The population of adults aged 90 and older is rapidly increasing, with projections to quadruple over the next four decades.

• Older adults are more likely to be women, have higher rates of widowhood, poverty, and disability.

• Many older adults continue to make significant contributions, such as academic achievements and professional accomplishments.

Theories of the Aging Process

Cellular and Biological Theories

Multiple theories explain the mechanisms of aging, each highlighting different biological processes:

• Free Radical Theory: Unpaired ions (free radicals) increase with age, causing oxidative stress and cellular damage.

• Biological Clock (Programmed Cell Death): Cells undergo apoptosis, a programmed process leading to cell death and tissue changes.

• Wear-and-Tear Theory: The body, like a machine, experiences gradual breakdown and loss of function over time.

• Immune Theory: The aging immune system struggles to distinguish healthy from defective cells, leading to increased susceptibility to illness and autoimmune responses.

Additional info: Other theories include telomere shortening, antagonistic pleiotropy, and disposable soma theory, which are beyond the scope of this summary.

Normal Physiological Changes in the Geriatric Adult

Bones and Cartilage

• Loss of body water and bone mass leads to decreased height.

• Collagen becomes rigid and elastin brittle, reducing cellular function.

• Loss of estrogen decreases bone density, increasing risk for osteoporosis and fractures.

Blood Vessels

• Arterial walls thicken and narrow, reducing oxygen supply to the heart.

• Blood pressure may rise; response to stress or pain is delayed.

Lungs

• Ribs and cartilage become more rigid, making breathing harder.

• Lung tissue loses elasticity, decreasing lung volume and oxygen exchange.

• Increased risk for respiratory infections.

Kidneys and Bladder

• Decreased filtration rate leads to accumulation of toxins.

• Bladder capacity decreases, causing urinary frequency and incontinence.

• Enlarged prostate in men may cause urinary retention.

Metabolism

• Retention of glucose and lipids increases risk for cardiovascular disease and diabetes.

• Muscle mass decreases, body fat increases.

Digestion, Taste, and Smell

• Decreased motility and digestive enzymes cause poor appetite and digestive disturbances.

• Loss of taste buds and sense of smell reduces interest in food.

• Reduced gag reflex increases risk of choking.

Teeth

• Tooth loss and gum changes affect chewing and nutrition.

• Regular dental care is essential.

Skin

• Skin becomes thinner, less elastic, and more prone to injury.

• Decreased sweat gland function increases risk for temperature-related issues.

Eyes

• Loss of elasticity and fat causes eye irritation.

• Decreased vision due to cataracts, glaucoma, and macular degeneration.

• Diabetes increases risk for retinal changes.

Ears

• Degeneration in ear structures leads to hearing loss, especially for high frequencies.

• Untreated hearing impairment affects mental and social well-being.

Nervous System

• Neurons atrophy, brain volume shrinks, and impulse transmission slows.

• Motor responses and reaction times are delayed.

Sexuality Needs of the Geriatric Adult

Sexual Health and Attitudes

Sexuality remains important throughout life. Ageism, or prejudicial attitudes against older adults, often falsely assumes a lack of sexual interest. Medications, chronic illness, and mobility issues can affect sexual function, but education and communication are key to maintaining sexual health.

• Sexual health involves well-being, respect, safety, and freedom from discrimination.

• Sexuality is influenced by previous experiences, body image, mental function, and social contact.

Sexual Responses in Aging Women

• Menopause causes vaginal dryness and decreased tissue expansion, but sexual response persists.

• Regular activity, lubricants, and nutrition help maintain comfort.

Sexual Responses in Aging Men

• Testosterone decreases, affecting erection and sperm production, but interest remains.

• Delayed erection and decreased orgasm intensity are common.

Impact of Illness on Sexuality

• Prostate cancer and treatments can affect sexual function.

• Postoperative care should address sexual health and options.

Psychological Changes and Challenges

Psychological Changes

• Role changes, such as becoming a caregiver, can cause stress and insecurity.

• Negative self-image may result from societal emphasis on youth.

• Geropsychology provides interventions for psychological needs of older adults.

Cultural Considerations

• Culture influences self-worth and health in old age.

• Ageism can lead to depression and loss of usefulness.

Psychosocial Problems Associated with Aging

• Loneliness due to loss of friends and family.

• Disengagement from social contacts and independence.

• Cognitive impairments, such as Alzheimer disease, lead to dependence.

• Elder abuse and neglect are risks due to dependency and frailty.

Major Developmental Tasks of the Geriatric Adult

Erikson's Developmental Tasks

• Ego Integrity vs. Despair: Reflecting on life achievements brings satisfaction; unresolved conflicts lead to despair.

• Immortality vs. Extinction: Advanced old age involves facing mortality and leaving a legacy.

• Adjusting to retirement and frailties of aging are key tasks.

Health-Promoting Activities for the Geriatric Adult

Physical Exercise

• Regular exercise promotes mental and physical health and reduces disease risk.

Occupational Activities

• Engagement in hobbies, part-time work, or volunteering maintains active mind and body.

Nutrition

• Challenges include dental loss, slowed digestion, and difficulty preparing meals.

• Community services like Meals on Wheels and senior centers support nutrition and socialization.

Prevention of Illness

• Regular checkups, immunizations, and monitoring chronic illnesses are essential.

• Access to care may be limited by mobility and transportation issues.

Mental Health

• Late-life depression is common, often due to isolation and loss.

• Support, counseling, and daily pleasurable activities help prevent depression.

Environmental Controls

• Safe environments reduce risk of falls and fractures.

Role of Diet, Exercise, and Stress Management

Healthy People 2030 goals emphasize diet, exercise, and stress management to extend lifespan and improve quality of life. Lifestyle modifications are essential for health maintenance and disease prevention.

Modifications of the Environment

• Home modifications (ramps, safety bars, lighting) support aging in place.

• Smart home devices and medical alert systems enhance safety and independence.

Factors in Selecting a Nursing Home

• Cost and insurance coverage

• Accessibility to medical services

• Philosophy of care and staffing

• Social services and therapy availability

• Personal space, privacy, and pet care options

Alternatives to Nursing-Home Care

• Aging in place with home modifications

• Assisted living facilities

• In-home care and community services

Activities of Daily Living (ADLs)

ADLs are essential tasks for independent living, including eating, toileting, bathing, grooming, cooking, shopping, and taking medications.

Principles of Elder Care and Role of Health-Care Worker

• Encourage confidence and self-image

• Empower and support autonomy

• Include family and social support

• Monitor exercise, nutrition, and health concerns

• Provide education and guidance

Teaching Needs of the Geriatric Adult

• Education about medication effects, sexual health, and disease prevention

• Support for maintaining physical activity and social engagement

Key Terms and Definitions

Term	Definition
Activities of Daily Living (ADLs)	Essential tasks for independent living (eating, bathing, dressing, etc.)
Aging in place	Ability to live safely and independently in one's own home
Ageism	Prejudicial attitudes and discriminatory practices against older people
Alzheimer disease	Progressive dementia with memory loss and cognitive decline
Apoptosis	Programmed cell death
Atrophy	Decrease in size of cells or organs
Biological clock	Programmed lifespan of cells
Disengagement	Withdrawal from social contacts and relinquishing independence
Elder abuse	Intentional infliction of pain or neglect
Free radical	Unpaired ion causing oxidative stress
Geriatrics	Medical specialty for older adults
Immune theory	Impaired immune response with age
Osteoporosis	Thinning of bone, increased fracture risk
Senescence	Period when body begins to age and weaken
Wear-and-tear theory	Gradual breakdown of body over time

Summary Table: Theories of Aging

Theory	Summary
Free radicals	Ions break free more frequently with age, causing oxidative stress
Biological clock	Cells have a programmed lifespan; undergo apoptosis
Immune	Aged immune system destroys both healthy and defective cells
Wear and tear	Cells wear out or break down with use over time

Summary Table: Age-Related Changes in Lungs

Change	Effect
Ribs and cartilage	Become more rigid; respiratory muscles work harder
Height of vertebrae	Reduced; chest cavity becomes smaller
Lung tissue	Loses elasticity; lung volume decreases
Surface area	Reduced; impairs oxygen exchange

Summary Table: Age-Related Changes Affecting Taste and Appetite

Change	Effect
Taste buds	Decrease in number; increased sensitivity to bitter
Sense of smell	Declines; contributes to loss of appetite
Digestive enzymes	Decrease; poor appetite and digestive disturbances

Summary Table: Age-Related Changes in Kidneys and Bladder

Change	Effect
Filtration rate	Decreased; accumulation of toxins
Bladder capacity	Decreased; urinary frequency and incontinence
Prostate enlargement (men)	Urinary retention

Key Points

• Senescence includes early-old, middle-old, and late-old categories.

• Physiological changes affect all body systems, influenced by genetics, lifestyle, and social support.

• Immortality versus extinction is the major developmental task of advanced old age.

• Health-promotion activities include exercise, nutrition, preventive maintenance, and environmental safety.

• Sexual needs and sense of being valued persist throughout life.

• Lifestyle adjustments support extended lifespan and health.

• Elder abuse includes physical, mental, social, or financial neglect or mistreatment.

• Living options include home, family, assisted living, or long-term care facilities.

• ADLs are essential for independent living.

• Health-care workers provide education and guidance for geriatric adults.

Example: Clinical Judgment Case Study

Mr. J. (77) and Mrs. J. (84) have differing fitness and health levels. To support aging in place safely:

• Modify home environment for accessibility and safety

• Provide assistive devices for hearing and vision

• Ensure nutritional support and regular health checkups

• Encourage social engagement and physical activity

Example: Age-Related Changes Affecting Appetite

• Loss of taste buds and increased sensitivity to bitter

• Decline in sense of smell

• Decrease in digestive enzymes

Example: Age-Related Changes in Kidneys and Bladder

• Decreased filtration rate and toxin accumulation

• Urinary retention in men with enlarged prostate

• Incontinence or urine leakage with activity

Example: Matching Terms and Definitions

Term	Definition
Ageism	Prejudicial attitudes and discriminatory practices against older people
Glaucoma	Atrophy of the optic nerve and increased intraocular pressure
Atrophy	Decrease in size
Senescence	Period in which the body begins to age and weaken
Apoptosis	Breaking down of the cell membrane leading to cell death
Disengagement	Process of withdrawing from social contacts and giving up independence

Additional info:

• Geropsychology is a specialized field addressing psychological needs of older adults.

• Healthy People 2030 provides goals for preventive health, chronic illness management, and caregiver training.

• Polypharmacy and medication errors are significant risks in elder care.