 [ Symptoms ] my 80 year old father a swollen knee bad ear pain slurred speech stumbling when walking memory loss talking to himself temporally not knowing who a person is hearing things [ Disease ] hi diabetes and heart problems has nothing to do with his present symptoms all these are result of dementia and irreversible damage to his brain cells that happens due to cerebral physiological atrophy in old age people these brain cells once damaged cannot be cured consult a neurologist thanks