The Terminal Man (1974)

Director: Mike Hodges
Cast: Donald Moffat, George Segal, Jill Clayburgh, Joan Hackett, Michael C. Gwynne, Norman Burton, Richard Dysart, William Hansen

Synopsis:

As the result of a head injury, brilliant computer scientist Harry Benson begins to experience violent seizures. In an attempt to control the seizures, Benson undergoes a new surgical procedure in which a microcomputer is inserted into his brain. The procedure is not entirely successful.