Which range of motion is performed by a therapist guiding the patient's limb?

The correct answer is Passive Range of Motion (PROM) because this term specifically refers to the movement of a joint through its range of motion with the assistance of an external force, typically a therapist or a device, rather than the patient actively engaging their muscles. In PROM, the therapist guides the patient's limb in a controlled manner to enhance flexibility and maintain joint mobility, particularly when the patient is unable to do so themselves due to pain, surgery, or other limitations.

Active Range of Motion involves the patient moving their own limbs without assistance, which distinguishes it from PROM, where the therapist provides the movement. Isometric exercises are focused on muscle contraction without any joint movement, while Assisted ROM refers to scenarios where a patient actively engages their muscles with some external assistance; however, this does not fully capture the specific nature of PROM, which is completely therapist-guided.