Purpose:  To improve mobility of the first carpometacarpal joint. 

Procedure:  Patient seated with the forearm stabilized on the table.  The therapist grasps the patient’s trapezium with the index finger and thumb of the stabilizing hand, while the thumb and index finger of the mobilizing hand grasp the base of the 1st metacarpal. 

To improve CMC flexion: The therapist provides glides to the 1st CMC parallel to the palm. 

To improve CMC abduction: The therapist provides dorsal glide to the CMC (perpendicular to the palm).