Cause you probably have better food then a restaurant
Well I'm just shooting in the dark for the obvious, but they must be careful that the patient doesn't depend on them too much. Although you're a therapist to help them, you need to walk a fine line so they don't always come to you for help and are able to do their own decisions. I'm sure it wouldn't be a bother to help them every now and then to help them make their own decisions, but there'll be times a therapist can't help (or opinionate) or simply believes that the person can work it through.
Answer:
Because muscles generate small electrical signals when they contract, electrodes placed on the surface of the skin can measure muscle movements. ... When a prosthetic arm has several joints, such as a transhumeral, or above-elbow, prosthesis, each joint might need to be controlled by the same switch or muscle.
Explanation:
Hope this helps : )