The document summarizes the main muscles of the hand, including the flexors, which originate in the forearm and bend the fingers, the thenar and hypothenar eminences which contain muscles that move the thumb and pinky, and the extensors, which are also extrinsic muscles that straighten the fingers through tendons and an extensor hood. The volar plate is mentioned as a ligament that prevents backwards bending of the proximal finger joints.

1. The Muscles (and tendons…) of the Hand David Tomlinson – Muscles of the Hand