Biden has cerebral vascular disease. He had a brain aneurysm in his late 40s. He’s had this condition for quite some time. I’m sure he’s had several TIAs (small arteries become temporarily plugged). People with this condition may not even be able to speak for a while. They experience dizziness, ataxia, vision problems, and cognitive issues. It is a progressive disease.
Basically, this is also the cause of his dementia. It is called vascular dementia:
https://www.nia.nih.gov/health/vascular-dementia/vascular-dementia-causes-symptoms-and-treatments
People with vascular dementia may experience:
Difficulty performing tasks that used to be easy, such as paying bills
Trouble following instructions or learning new information and routines
Forgetting current or past events
Misplacing items
Getting lost on familiar routes
Problems with language, such as finding the right word or using the wrong word
Changes in sleep patterns
Difficulty reading and writing
Changes in personality, behavior, and mood, such as depression, agitation, and anger
Hallucinations or delusions (believing something is real that is not)
Poor judgment and loss of ability to perceive danger
And by the way, patients with cerebral vascular disease are helped by Parkinson’s medications if vascular damage has reached certain areas of the brain, but this is not classic Parkinson’s disease. That is probably why they are saying he doesn’t have Parkinson’s.
An older female relative of mine has an early form of vascular dementia. They don’t see many capillaries in her brain.
She forgot her email password three weeks ago, and hasn’t been able to get into it, since. It’s the same email password she’d had for years.