Lewy body dementia (LBD) is a complicated memory and movement disease affecting more than 1 million Americans.

There are two types: dementia with Lewy bodies and Parkinson's disease dementia. The main difference between the two is when the start of thinking and movement symptoms occur. 

People with the condition may not have every symptom in the early stages of LBD. 

See how LBD affects our brains and causes symptoms in this infographic from the National Library of Medicine.