Name of movie re: autistic boy
I'm looking for the name of a movie which is prior to 'Rain Man" 1988. It's a story of a young boy (age 3-6) who suddenly develops autism and his mom tries to find out everything regarding autism and special clinics. What I remember most is the son being on the kitchen floor twirling/flipping his hands. One part of the movie the mom tries to get him into a clinic/hospital which uses unusually rougher techniques to help autistic kids. I remember one part of the movie a dr./counselor was explaining to the mother what he thought autism was. I thought that the child’s name might have been David and did do a search but was unable to find anything even on imdb. Please help!