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.

What is the significance of the saddle joint in the context of the thumbs?

In which plane does flexion and extension of the thumb occur?

What direction should the first metacarpal be mobilized to improve flexion?

How does the role and slide of the first metacarpal change when moving in the frontal plane?

What is the role of the thumb during abduction at the carpometacarpal joint?

Explain the relationship between the mobilization direction and the role of the first metacarpal during abduction.

What would be the mobilization direction to improve adduction at the thumbs carpometacarpal joint?