Forearm rotation would be on the frontal plane
radius (lateral) Ulna (medial)
The anterior forearm muscle does not actually exist. Instead, there are a total of eight different muscles with the anterior compartment of the forearm. Their jobs are specifically related to flexion and pronation, or inward rotation of the hand.
Medial rotation of the forearm is called pronation in its broadest sense, so "medial rotation of the arm" most probably refers to movement at the shoulder.The best example is if you flex your forearm at 90° to your arm, and you bring your hand to your midline, this is medial rotation of the arm at the shoulder.Medial rotation of the arm is the rotation of the humerus(arm bone) around its long axis (imagine a line from elbow to shoulder).
The two bones that make up the lower arm, or forearm, are called the radius and the ulna. The radius is the bone that is located on the thumb side of the forearm. The ulna is the bone that is located on the pinky side of the forearm.
The antagonist for the supinator muscle is the pronator teres muscle. These muscles work in opposition to each other to produce rotation of the forearm.
The rotator cuff muscles: Supraspinatus Infraspinatus Teres Minor Supscapularis Easily remembered as SITS.
Turning the palm backward or downward is called pronation. This movement involves rotation of the forearm so that the palm faces downward or backward.
Flexion when you pull your forearm towards your body and extension when you extend it away from your body.
The ulna is a bone in forearm
The proximal and distal are pivot synovial while the middle is syndesmosis/fibrous
-The boy had cuts and bruises on his forearm. -The war veteran lost his forearm in Vietnam. -I hurt my forearm playing sports.