Memory loss and forgetfulness

Your father may have dementia. This is common is the elderly population. Dementia has many causes. There are medications to help with the dementia. If the neurologist is offering no assistance with this go to another one. A second opinion is always helpful. Another neurologist may offer some treatment options for your father. Your father is may have suffered memory loss due to the stroke. This is common to occur as a result of the stroke. A work up should be done to try to find out why your father had a stroke. An ekg with a cardiologist will tell the doctor if your dad has a dysrhythmia that caused a clot to travel from the heart to the brain which would lead to a stroke. This is treated with medication. A blood test can be done by the neurologist to check if there is a deficiency in protein S and protein C which causes clotting of the blood and could lead to a stroke. Again, this can be treated with medication. My point here is that your dad need a work up to see if further strokes can be prevented. I don't know what the neurologist has done or not done for your dad. I gave you a few ideas of tests that are commonly done to assess risk for further strokes. If none of this has been done, consider another doctor. Hope this is helpful.