The Smallest of the Posterior Extensors of the Elbow Joint Is The
The elbow joint is comprised of a number of different muscles and ligaments that work together to make it a powerful and flexible joint. The posterior extensors are the muscles that are located on the back of the forearm and work to extend or straighten the elbow.
Among these posterior extensors, the smallest is the Brachioradialis. It originates from the lower end of the humerus, or upper arm bone, and inserts on the radius at the radial styloid. This muscle is responsible for flexion of the elbow joint, making it important when doing activities such as hammering a nail.
The Brachioradialis is roughly triangular in shape. It runs along the length of the foreground and is covered by a thin layer of fascia which helps it to stay in place. It also has two main functions: elbow flexion and supination. This means that it helps to bend and rotate the forearm, enabling a person to perform such tasks as writing or turning a screwdriver.
At the distal end of the Brachioradialis is a tendon which attaches to the base of the second metacarpal (index finger) and the metacarpophalangeal joint (knuckle). This tendon is known as the common extensor tendon and it helps to control and add stability while also protecting the flexor muscles from damage.
The Brachioradialis muscle is the smallest of the posterior extensors of the elbow joint, but still has an important role in enabling people to carry out everyday activities. It is essential for healthy elbow movement, so it is important to keep this muscle strong and flexible.