The ligament that holds the bones in your forearm together and helps form the pivot joint there has been torn. How might this affect your ability to move your hand and arm? What kind of movement may be affected?

Extension and flexion at both ends may be affected.

Explanation:

The ligaments are responsible for promoting the performance of maximum extension and flexion movements, they are responsible for modulating these movements thanks to their flexibility and their proprioceptors that, together with the muscular golgi reticulum, indicate the limit of action.

On the other hand, they are those that assemble the joint, make it a 100 percent dynamic joint, and act together with the elasticity of its collagen fibers in relation to the muscle bundles.