Biomechanics of the Thumb: Flexion, Extension, Abduction, Adduction, Opposition, and Reposition

This is a brief discussion of the fundamental motions of the thumb at the carpometacarpal (CMC), metacarpophalangeal (MCP), and interphalangeal (IP) joints. I define the planes and axes specific to the thumb and how the relate to the planes of the fingers. I explain of internal rotation and external rotation are related to flexion, extension, abduction, adduction, opposition, and reposition.

[@lucasramosp]

I would love to see a video explaining the movements of supination/pronation/adduction/abduction/inversion/eversion on the foot.