Patients who have had a neurological illness, such as a stroke, often lose their ability to control the way they move their arms, legs or trunk. They may have tremors, spasms or lose the ability to know where their arm or leg is in space. Physical therapists are trained to use different techniques to help patients with these problems regain the use of their limbs. These techniques may include weight-bearing exercises and moving or positioning limbs in specific patterns. Therapists may also use devices, such as slings or splints, to help with proper limb positioning.