A PTA is assisting a therapist with shoulder joint mobilizat…
A PTA is assisting a therapist with shoulder joint mobilizations for a patient reporting mild stiffness and discomfort at the end of available range. The therapist instructs the PTA to begin with a small‑amplitude oscillation performed at the very beginning of the joint’s available range to reduce pain. Later in the session, the therapist asks for a larger‑amplitude oscillation performed into tissue resistance to improve mobility. Which grades of joint mobilization correspond to these two techniques?