Can an aneurysm cause a form of dementia later in life? My mother had one 10 years ago. Some apparent brain damage occured, i.e. confusion about time and space and short term memory loss, trouble with gait. Now there are more problems following conversations, staying on topic, not wanting to bathe, hollering at night, lack of more than 3 hrs. sleep in a row. She is now 83 y/o.