Your tricep muscles contract and pull, while your bicep muscles relax, causing your arm to straighten back out. You can find antagonistic pairs in your legs too. Just extend and curl and see which ...

and shoulder flexed to 90° with elbow extended and forearm pronated or neutral. Muscle synergies were extracted using non-negative matrix factorisation for each position and participant, independently ...

keeping your upper arm and elbow still. The wrist extensors are a group of muscles that are responsible for bending your wrist, as when making the hand signal for “stop.” These small muscles ...