Alzheimer’s/Dementia

Alzheimer's/Dementia

Alzheimer’s disease typically progresses slowly in three general stages — mild (early-stage), moderate (middle-stage), and severe (late-stage).

Overview of disease progression

The symptoms of Alzheimer’s disease worsen over time, although the rate at which the disease progresses varies. On average, a person with Alzheimer’s lives four to eight years after diagnosis, but can live as long as 20 years, depending on other factors.

Changes in the brain related to Alzheimer’s begin years before any signs of the disease. This time period, which can last for years, is referred to as preclinical Alzheimer’s disease.

The stages below provide an overall idea of how abilities change once symptoms appear and should only be used as a general guide. They are separated into three different categories: mild Alzheimer’s disease, moderate Alzheimer’s disease and severe Alzheimer’s disease. Be aware that it may be difficult to place a person with Alzheimer’s in a specific stage as stages may overlap

Mild Alzheimer’s disease (early-stage)

In the early stage of Alzheimer’s, a person may function independently. He or she may still drive, work and be part of social activities. Despite this, the person may feel as if he or she is having memory lapses, such as forgetting familiar words or the location of everyday objects.

Friends, family or others close to the individual begin to notice difficulties. During a detailed medical interview, doctors may be able to detect problems in memory or concentration.

Common difficulties include:

  • Problems coming up with the right word or name
  • Trouble remembering names when introduced to new people
  • Challenges performing tasks in social or work settings.
  • Forgetting material that one has just read
  • Losing or misplacing a valuable object
  • Increasing trouble with planning or organizing

Moderate Alzheimer’s disease (middle-stage)

Moderate Alzheimer’s is typically the longest stage and can last for many years. As the disease progresses, the person with Alzheimer’s will require a greater level of care.

You may notice the person with Alzheimer’s confusing words, getting frustrated or angry, or acting in unexpected ways, such as refusing to bathe. Damage to nerve cells in the brain can make it difficult to express thoughts and perform routine tasks.

At this point, symptoms will be noticeable to others and may include:

    • Forgetfulness of events or about one’s own personal history
    • Feeling moody or withdrawn, especially in socially or mentally challenging situations
    • Being unable to recall their own address or telephone number or the high school or college from which they graduated
    • Confusion about where they are or what day it is
    • The need for help choosing proper clothing for the season or the occasion
    • Trouble controlling bladder and bowels in some individuals
    • Changes in sleep patterns, such as sleeping during the day and becoming restless at night
    • An increased risk of wandering and becoming lost
    • Personality and behavioral changes, including suspiciousness and delusions or compulsive, repetitive behavior like hand-wringing or tissue shredding

Severe Alzheimer’s disease (late-stage)

In the final stage of this disease, individuals lose the ability to respond to their environment, to carry on a conversation and, eventually, to control movement. They may still say words or phrases, but communicating pain becomes difficult.

At this stage, individuals may:

      • Need round-the-clock assistance with daily activities and personal care
      • Lose awareness of recent experiences as well as of their surroundings
      • Experience changes in physical abilities, including the ability to walk, sit and, eventually, swallow
      • Have increasing difficulty communicating
      • Become vulnerable to infections, especially pneumonia

Source: Alzheimer’s Association®

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