Dementia hallucinations triggered actor Robin Williams suicide

According to a new report, legendary actor Robin Williams' suicide was triggered by a horrible disease called Lewy Body Dementia.

From TMZ

TMZ has obtained documents showing Williams was struggling with the disease, which is marked by abnormal protein deposits in the brain that disrupt normal function. 

Lewy Body Dementia is a common condition associated with Parkinson's ... and people afflicted by both often get severe side effects from Parkinson's meds. Hallucinations are common, where patients see phantom objects, people or animals. The patients often try to converse with the illusions.