Alzheimer's Disease

Alzheimer's vs healthy brain: amyloid plaques and tau tangles

What is Alzheimer's Disease?

Alzheimer's disease is a progressive neurological disorder that causes brain cells to degenerate and die. It is the most common cause of dementia, leading to a continuous decline in cognitive, behavioral, and social skills, which affects a person's ability to function independently.

Symptoms of Alzheimer's Disease

Memory loss: One of the earliest and most common signs, especially forgetting recently learned information.
Difficulty in planning or solving problems: Trouble following familiar recipes or managing bills.
Confusion with time or place: Losing track of dates, seasons, or the passage of time.
Challenges understanding visual images and spatial relationships: Issues with reading, judging distance, or recognizing objects.
Problems with speaking or writing: Struggling with vocabulary, stopping in the middle of a conversation, or repeating oneself.
Misplacing items and being unable to retrace steps to find them.
Poor judgment: Decreased judgment or decision-making skills.
Withdrawal from social activities: Avoiding social interactions or hobbies.
Changes in mood or personality: Increased confusion, suspicion, depression, or anxiety.

Risk Factors

Age: The most significant known risk factor. Most people with Alzheimer's are 65 and older.
Family history and genetics: Having a parent or sibling with Alzheimer's increases the risk.
Genetic predisposition: Specific genes, such as APOE-e4, are linked to a higher risk.
Head injuries: Past head trauma may increase the risk.
Lifestyle and heart health: Factors like smoking, obesity, high blood pressure, and diabetes can elevate the risk.

Stages of Alzheimer's Disease

1. Early Stage (Mild Alzheimer's)

Symptoms: Minor memory lapses and difficulty with complex tasks.
Independence: Individuals may still function independently but with occasional assistance.

2. Middle Stage (Moderate Alzheimer's)

Symptoms: More pronounced memory loss, confusion, and difficulty recognizing family and friends.
Behavioral changes: Increased wandering, agitation, and repetitive behaviors.
Assistance: Requires more significant support with daily activities.

3. Late Stage (Severe Alzheimer's)

Symptoms: Severe memory loss, loss of communication abilities, and complete dependence on caregivers.
Physical symptoms: Difficulty walking, swallowing, and general unresponsiveness.

Diagnosis

Medical history: Reviewing medical and family history, along with changes in behavior.
Cognitive tests: Assessing memory, problem-solving, attention, and language skills.
Neurological exams: Evaluate balance, reflexes, and senses.
Brain imaging: CT or MRI scans to rule out other conditions and identify brain atrophy.
Biomarker tests: Can include spinal fluid tests or PET scans to detect specific protein changes associated with Alzheimer's.

Management and Treatment

Medications:
- Cholinesterase inhibitors: Helps increase communication between brain cells (e.g., donepezil, rivastigmine).
- Memantine: Regulates brain chemicals and may help with memory and learning.
- Medications for symptoms: To manage depression, anxiety, or behavioral issues.
Therapies:
- Occupational therapy: Helps adapt living environments for safety.
- Cognitive stimulation: Engages memory and thinking skills through activities.
Lifestyle modifications: Regular physical activity, a balanced diet, social engagement, and mental stimulation.

Complications of Alzheimer's Disease

Inability to communicate: Leads to increased frustration and behavioral challenges.
Reduced mobility: Can lead to bedsores, blood clots, and infections.
Malnutrition and dehydration: Challenges with swallowing or forgetting to eat/drink.
Increased risk of infections: Such as pneumonia due to weakened immune function.
Death: Alzheimer's is a terminal disease, with most people succumbing to complications such as infections or organ failure.