Final answer:
The most appropriate referral for a client diagnosed with thoracic outlet syndrome would be the physical therapist. Physical therapists are highly trained experts in the mechanics of body movements and specialize in helping patients with muscle or joint injuries.
Step-by-step explanation:
The most appropriate referral for a client diagnosed with thoracic outlet syndrome would be the physical therapist. Physical therapists are highly trained experts in the mechanics of body movements and specialize in helping patients with muscle or joint injuries. They create personalized treatment plans that may include exercises, heat therapy, and other techniques to improve range of motion and reduce pain.