Thumb CMC Joint Mobilizations [with Convex-Concave Rules]

The video tutorial explains the biomechanics of the thumb's carpometacarpal (CMC) joint, focusing on its movement in different planes. It covers how the joint's saddle shape affects mobilization during flexion and abduction. For flexion, the first metacarpal is concave, moving on a convex trapezium, resulting in a palmar mobilization. In abduction, the roles reverse, with the first metacarpal being convex, requiring a medial mobilization. The tutorial emphasizes understanding the joint's anatomy to determine the correct mobilization direction.

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