BrainWaves (1982)

After a traffic accident Kaylie is in coma for months. Her doctors want to try a new procedure on her: to regain her consciousness, they stimulate her brain with neural patterns of a woman who just died. It works, and Kaylie seems to be ok again. However in her dreams, she lives the last day of her savor - and realizes that she's been killed! Together with her husband she tries to find out what happened.