Dementia

Core Concepts

The spectrum: normal aging, mild NCD, major NCD (dementia)

Dementia sits at the far end of the cognitive spectrum described in this chapter. Normal aging brings slower processing and occasional slips but no functional loss. Mild neurocognitive disorder is measurable decline with preserved independence. Dementia (major NCD) is decline severe enough that the person needs help with everyday activities — managing money, taking medications, cooking, and eventually bathing and dressing. The boundary is functional, and it moves as the disease progresses.

Common types of dementia

The type matters for course, symptoms, and care planning. Alzheimer's disease is the most common, accounting for the majority of cases. It typically begins with memory loss — especially for recent events — and progresses gradually through language problems, disorientation, and behavioral changes. The brain shows amyloid plaques and neurofibrillary tangles, and risk increases with age, with genetic factors playing a role in some families. Vascular dementia results from impaired blood flow to the brain — often after strokes or with longstanding high blood pressure, diabetes, or heart disease. Its course is often stepwise: sudden drops in function with each new vascular event. Lewy body dementia features fluctuating cognition, visual hallucinations, and parkinsonian movement symptoms (stiffness, slow movements), often with sleep disturbances. Frontotemporal dementia typically begins earlier (often in the 50s and 60s) with prominent changes in personality, behavior, or language before memory is severely affected. Mixed pathology — Alzheimer's changes plus vascular damage, for example — is common in older people. These are clinical descriptions for study; actual diagnosis is made by qualified clinicians using full evaluation.

The stages of dementia

Dementia is commonly described in three broad stages. Early stage: subtle memory and word-finding problems; the person manages with routines, reminders, and support; independence is partially preserved, and the person may be aware of and distressed by the changes. Middle stage: more obvious cognitive and functional decline — getting lost, forgetting family names, needing help with dressing, bathing, and finances; behavioral and psychological symptoms (see below) often emerge. Late stage: profound cognitive loss, dependence for all physical care, difficulty communicating, incontinence, and often immobility. The nurse's goals shift across stages from supporting independence to preserving comfort, dignity, and connection.

Behavioral and psychological symptoms of dementia (BPSD)

Beyond cognition, dementia changes behavior and emotion: agitation, aggression, wandering, repetitive questioning, hallucinations or delusions, sleep disruption, apathy, and depression. The guiding principle is that behavior is communication: the person is trying to express something — pain, hunger, fear, boredom, overstimulation, or the need to use the bathroom — that they can no longer put into words. The nursing response is to look for the need and the trigger first (What changed? What happened right before?), modify the environment, and use a calm, reassuring approach. Nonpharmacological strategies come first; any medication use follows provider orders and facility policy, and careful attention is paid to risks, because some medications can worsen cognition. Agitation often peaks in the late afternoon and evening — the "sundowning" pattern — and is managed with routines, adequate light, reduced stimulation, and familiar activities.

Communication and person-centered care

Person-centered care, the philosophy articulated by Kitwood and now standard in dementia care, treats the person's experience as valid and the relationship as therapeutic. Communication techniques include approaching slowly and at eye level, speaking in short simple sentences, allowing time to respond, using touch and tone, avoiding arguing or quizzing ("Don't you remember?"), and entering the person's reality rather than correcting it — if the person believes it is 1965, the caregiver talks about 1965 rather than insisting on the date. Validation, dignity, choice (even small choices like what to wear), and meaningful activity are the daily tools of dementia nursing.

Nursing care and family support

Nursing care spans safety, function, and family. Safety: preventing falls, wandering (including elopement risk), burns, and medication errors; assessing driving ability and addressing it early. Function: maintaining mobility, nutrition, hydration, sleep, and toileting routines. Family: caregivers carry enormous burden and grief — education about the disease and its course, teaching communication techniques, connecting families with support resources, and acknowledging their loss ("the long goodbye") are nursing contributions that change outcomes. The nurse also monitors for reversible superimposed problems — a sudden worsening in a person with dementia may be delirium from an infection or medication (see the delirium topic), and an acute change is always reported to the provider promptly.

Common Confusions