Die Nackte und der Satan 1959, The Head, The Screaming Head, A Head for the Devil, Обнажённая и Сатана, ENG+(eng sub)

A scientist invents a serum that keeps a dogs head alive after its body dies. When the scientist dies of a heart attack, his crazed assistant cuts off his head and, using the serum, keeps the doctors head alive and forces it to help him on an experiment to give his hunchbacked nurse assistant a new body.