Mature: Spreading Thumbs

The human thumb is unique due to the saddle joint (carpometacarpal joint) at its base. Mature spreading involves: Moving the thumb away from the palm. Opposition: Bringing the thumb tip to meet other fingers. Rotation: The ability to pivot for a secure "power grip."

If thumb spreading is restricted or "immature," these exercises can help: mature spreading thumbs

Drawing on a chalkboard to naturally extend the thumb. The human thumb is unique due to the