10.2 Alzheimer's Disease & Person-Centered Behavioral Management

10.2 Alzheimer's Disease & Person-Centered Behavioral Management

Alzheimer's disease (AD) accounts for a large share of dementia cases. It is a progressive, irreversible brain disorder that systematically destroys memory, reasoning, communication, and self-care capacity. In long-term care facilities, certified nursing assistants (CNAs) provide the majority of direct personal care for residents with Alzheimer's disease, requiring mastery of neuropathology, clinical staging, and person-centered behavioral management.

Neuropathology of Alzheimer's Disease

At the microscopic level, Alzheimer's disease features two neuropathological hallmarks:

1. Extracellular Amyloid-Beta Plaques: Insoluble fragments of amyloid-beta peptide aggregate between neurons into dense, sticky plaques. These plaques trigger chronic neuroinflammation and oxidative stress that disrupt synaptic signaling.
2. Intracellular Tau Neurofibrillary Tangles: The tau protein, which normally stabilizes internal axonal microtubules transporting nutrients, becomes hyperphosphorylated. It twists into insoluble tangles, collapsing the intracellular transport system and causing neuronal death.

As neurons die, the brain undergoes progressive cerebral atrophy. Degeneration begins in the entorhinal cortex and hippocampus—the structures consolidating short-term memories—before spreading across the cerebral cortex. Concurrently, levels of acetylcholine, a neurotransmitter critical for memory and learning, decline precipitously.

The "Four A's" of Alzheimer's Disease

Progressive cortical destruction manifests clinically through the "Four A's":

• Amnesia: Pathological memory loss. Short-term memory fails first due to early hippocampal damage; a resident cannot recall breakfast eaten 15 minutes ago, yet vividly describes childhood events from 60 years earlier. Remote memories fade in advanced stages.
• Aphasia: Language deterioration. Expressive aphasia impairs word retrieval and sentence formation (hesitation, circumlocutions, or incorrect word substitutions), while receptive aphasia impairs comprehension of spoken language. Speech eventually diminishes to monosyllables or mutism.
• Apraxia: Inability to execute learned, purposeful motor tasks despite intact muscle strength and coordination. The brain's motor planning centers can no longer sequence the steps required to button a shirt, tie shoelaces, manipulate utensils, or brush teeth.
• Agnosia: Inability to recognize familiar objects, sounds, or people through sensory perception despite intact sensory organs. A resident may attempt to comb hair with a toothbrush, mistake a pen for silverware, or fail to recognize their reflection in a mirror (believing an intruder is present). It also causes prosopagnosia (failure to recognize familiar faces).

Clinical Staging: Mild, Moderate & Severe Dementia

Alzheimer's disease progresses across three primary functional stages:

Mild (Early-Stage) Alzheimer's Disease

The individual remains independent in basic personal ADLs but displays executive lapses:

• Misplacing items in inappropriate locations (keys in the freezer).
• Difficulty managing complex instrumental ADLs (IADLs), such as finances or medications.
• Subtle word-finding difficulty and trouble recalling new names.
• Variable Insight: Some residents remain aware of their deficits, frequently experiencing reactive anxiety, embarrassment, and depression.

Moderate (Middle-Stage) Alzheimer's Disease

The longest stage, lasting years, during which support needs often increase:

• Prominent memory loss: Inability to recall personal history, address, or phone number.
• Disorientation: Confusing seasons, dates, and locations.
• ADL Dependence: Needing step-by-step cueing to dress, bathe, and groom.
• Behavioral Symptoms: Sundowning, wandering, pacing, paranoia, and sleep-wake disruptions.

Severe (Late-Stage) Alzheimer's Disease

Extensive cortical destruction leaves the resident completely dependent on caregivers:

• Loss of verbal communication: Speech reduced to groans, repetitive syllables, or mutism.
• Loss of motor function: Inability to ambulate, sit unsupported, or smile; residents become bedbound with joint contractures.
• Total bowel and bladder incontinence.
• Severe Dysphagia: Inability to chew and swallow safely, posing severe risks for choking, aspiration pneumonia, and systemic infection.

Person-Centered Non-Pharmacological Behavioral Interventions

In modern memory care, behaviors reflect attempts to communicate unmet physiological, emotional, or environmental needs. Because psychotropic drugs carry severe mortality and fall risks, non-pharmacological care is the mandatory first-line approach.

Sundowning

Late-afternoon and early-evening agitation, confusion, and restlessness (typically 4:00 PM to 8:00 PM).

• Triggers: Physical exhaustion, fading daylight creating disorienting shadows, and shift-change commotion.
• CNA Interventions: Turn on lights and close blinds before dusk to eliminate shadows; minimize noise, turn off loud televisions, and play soft music; maintain predictable routines; limit late-day caffeine as indicated and follow the nutritional plan rather than imposing an arbitrary sugar cutoff; offer a relaxing warm decaffeinated drink or light snack.

Wandering and Pacing

Aimless walking driven by unmet needs (hunger, thirst, need to void, pain, boredom, search for home or safety).

• CNA Interventions: Meet physical needs promptly (toileting, hydration, finger foods); provide safe walking paths or secure courtyards; use only approved environmental cues that preserve emergency exit access and signs; ensure resident wears an electronic WanderGuard tracking band; redirect by walking alongside them rather than pulling or grabbing.

Catastrophic Reactions

Severe emotional outbursts (screaming, intense weeping, combative striking) triggered by sensory overload or frustration exceeding cognitive capacity.

• CNA Interventions: Stop the activity immediately; step back at least an arm's length to give space; speak in a calm, soft voice; reduce environmental noise; never argue, scold, or physically restrain the resident; allow time to recover before re-approaching with simplified care.

Repetitive Questioning and Perseveration

Continuous repetition of a phrase, question, or motor action ("Where is my mother?").

• CNA Interventions: Recognize the underlying anxiety; answer calmly using the exact same words; validate the emotion ("You miss your mother; she loves you very much"); gently redirect to a tactile activity like folding towels.

Hoarding and Rummaging

Searching through drawers and collecting items driven by a need for security.

• CNA Interventions: Provide dedicated "rummage drawers" filled with safe tactile items (socks, washcloths, yarn); inspect wastebaskets and laundry hampers before emptying to recover misplaced eyeglasses, dentures, or hearing aids.

Validation Therapy versus Reality Orientation

The appropriate communication strategy depends on cognitive staging:

• Validation Therapy (Naomi Feil): One supportive communication approach for some residents with dementia. Validation accepts that the resident's statements reflect their perceived emotional reality. The CNA enters their reality without correction or confrontation. If an 88-year-old resident insists she must feed her young children, the CNA never argues ("Your children are in their 60s and you live in a nursing home"), which forces them to relive the trauma of loss. Instead, the CNA validates: "You love your children so much. Tell me about them." This relieves fear and preserves dignity.
• Reality Orientation: Continually orienting the individual to time, place, and person using clocks, calendars, and verbal corrections.
  • Indication: Effective for mild cognitive impairment (MCI) or acute, resolving delirium where the brain can retain facts.
  • Contraindication: Avoid repeated corrections that increase distress. Gentle reminders, familiar signs, clocks, or orientation can still help some residents; observe response and follow the care plan.

Sources checked October 16, 2026

NIA dementia guidance; IDSA bacteriuria and delirium; SAMHSA suicide prevention.