Right to Die (1987)

Emily Bauer (Raquel Welch) is a successful psychologist with a happy home life who is suddenly stricken with the dreaded neurological affliction ALS (aka "Lou Gehrig's Disease"). At first, she is determined to fight for her life, but as her conditions deteriorates and she becomes more of a human vegetable, Ms. Welch begs her husband (Michael Gross) to help her die.