Pronator teres
pronates the forearm
The Pronator Teres muscle pronates the forearm at the radioulnar joint. It also provides flexion of the forearm at the elbow joint
Muscle of the hand.
The biceps brachii muscle acts as a synergist for supination of the hand. It works in coordination with other muscles, such as the supinator muscle, to rotate the forearm and bring the palm facing upwards.
Extrinsic muscles of the hand originate in the antebrachium (forearm).
muscle contraction
The Extensor Digitorum.
extensor digitorum
Mostly no.
funny bone
A voluntary muscle is a muscle that is consciously moved by the body, i.e. the muscles in your hand or leg. An involuntary muscle is a muscle that is unconsciously moved by the body, i.e. your heart.
It is a muscle reflex. A very fast, involuntary muscle contraction. Because of this, it causes you to jerk your hand away after touching a hot iron.