What muscles attach to the radius?
The upper third of the body of the bone attaches to the supinator, the flexor digitorum superficialis, and the flexor pollicis longus muscles. The middle third of the body attaches to the extensor ossis metacarpi pollicis, extensor primi internodii pollicis, and the pronator teres muscles.
Does the radius bone twist?
Radius. The radius is one of the two forearm bones and is on the thumb side of the forearm near the hand, but is always on the outside of the elbow. The position of the radius changes depending on how the hand is turned because the radius twists around the other forearm bone, the ulna.
What is a radius ulna?
The radius and the ulna constitute as the bones of the forearm. The antebrachial region, as it is clinically known, spans the length of the region which extends roughly from elbow to wrist. The radius is the lateral of the two bones, which makes the ulna the medial bone of the forearm.
Where would you find the ulna and radius?
forearm
The forearm consists of two bones, the radius and the ulna, with the ulna is located on the pinky side and the radius on your thumb side.
What does the radius articulate with?
The radius articulates proximally at the elbow with the capitulum of the humerus and the radial notch of the ulna. It articulates at its distal end with the ulna at the ulnar notch and with the articular surfaces of the scaphoid and lunate carpal bones.
What does the ulna articulate with?
The ulna is the longest, thinnest bone of the forearm. It articulates proximally with the trochlea of the humerus and with the head of the radius. Distally it articulates with the ulnar notch of the radius and with an articular disk that separates it from the carpal bones.
Does the radius cross over the ulna?
The distal radius crosses over the distal ulna and inverts to allow the wrist and hand to pronate. A reversal of this movement allows for supination. In addition to pronation and supination, three articulations allow for extension and flexion at the elbow joint.
What muscles move the radius and ulna?
Terms in this set (8)
- Biceps brachii. Origins: Long head: superglenoid tubercle of scapula; short head: coracoid process of scapula.
- Brachialis. Origin: anterior humerus.
- Brachioradialis. Origin: distal humerus.
- Triceps brachii.
- Aconeus.
- Pronator teres.
- Pronator quadratus.
- Supinator.