Clinical measurements of joint motion and position in the neutral-zero method and SFTR recording: basic principles

The SFTR method of recording joint motion and position in the internationally accepted neutral-zero method provides a truly international system avoiding confusion of language and terminology. It allows one to record and read data in one way only, thus facilitating communication. It is short, precise, easy to learn and suitable for computer use. It also allows recording of strength of agonist and antagonist muscles.