Alzheimer’s Disease vs. Dementia with Lewy Bodies: What’s the Difference?

Many people use the terms Alzheimer’s and dementia interchangeably, but dementia is actually an umbrella term for several different brain disorders. Two of the most commonly confused types are Alzheimer’s disease and Dementia with Lewy bodies (DLB). Understanding the difference can help individuals and families recognize symptoms earlier and seek the right support.

Alzheimer’s disease is the most common form of dementia. It typically begins with memory loss, such as forgetting recent conversations or events, and gradually affects thinking, reasoning, and the ability to perform everyday tasks. Changes usually happen slowly over time.

Dementia with Lewy bodies, on the other hand, is caused by abnormal protein deposits called Lewy bodies in the brain. While memory can be affected, early symptoms often look different and may include:

• Visual hallucinations

• Changes in alertness or attention that fluctuate throughout the day

• Sleep disturbances, especially acting out dreams

• Parkinson’s-like symptoms such as stiffness, tremors, or slow movement

Because symptoms can overlap, Dementia with Lewy bodies is sometimes misdiagnosed as Alzheimer’s or Parkinson’s disease. However, accurate diagnosis matters, as treatment approaches and medication responses can differ significantly.

The Alzheimer's Association continues to support research, education, and resources for all forms of dementia, helping individuals, caregivers, and families navigate diagnosis, care planning, and support services.

👉 Learn more about Dementia with Lewy bodies and how it differs from Alzheimer’s disease here: https://bit.ly/4he1UbK