someone i know has a sudden onset of an inability to walk and is having diffuculty with the use of his fingers. He has abused drugs and alcohol almost all of his life and is now 55 yrs old. I have only spoken to him on the phone and have not actually sen him. Because he is so often intoxicated it is difficult to tell if he is drunk or not but his responses to my questions are noticably slow. Can younarrow down what e may have