My Father Is Not Behaving Properly, He Is Forgetting Very

My father is not behaving properly, he is forgetting very soon and keeps on asking the same question again and again. EEG has been done and the doctor said that there is something wrong in the nerve of brain, but I am not satisfied with the report because he is behaving properly but only sometimes at night he tries to leave the home and ran away. Then he starts behaving normally. Please help me at the earliest. If you insist then I can show the EEG Report which is done in Patna, Bihar.