Brachioradialis

A muscle located in the forearm, primarily involved in the flexion of the elbow.

The brachioradialis is a long muscle of the forearm that arises from the lateral supracondylar ridge of the humerus and extends down to the styloid process of the radius. It plays a key role in the movement of the forearm, particularly in positions where the forearm is in a neutral position between supination and pronation.

Terminologia Anatomica

brachioradialis

System

Muscular system

Function

The primary function of the brachioradialis is to flex the elbow joint, particularly when the forearm is in a mid-position between a palm-up (supinated) and palm-down (pronated) orientation. This muscle is utilized when performing motions that require powerful elbow flexion, such as lifting or carrying objects. Additionally, the brachioradialis assists in stabilizing the elbow during various arm movements, providing support and strength. While its contribution to forearm pronation and supination is secondary, it still plays a role in these actions by helping to maintain the position of the forearm. Athletes and individuals engaging in physical activities often rely on the strength of the brachioradialis, underscoring its importance in forearm and elbow mechanics.

Location

The brachioradialis is situated on the radial side of the forearm, spanning from just above the elbow to just below the radius bone. It originates from the lateral supracondylar ridge of the humerus, which is located on the outer side of the upper arm, and descends diagonally towards the wrist. The muscle inserts at the styloid process of the radius, a bony prominence at the wrist. This positioning allows it to effectively connect two major articulating parts of the arm, facilitating movement and contributing to a range of functions associated with elbow flexion.

Did You Know?

The brachioradialis is often referred to as the 'handshake muscle' because it is most active when the arm is in a neutral position, similar to the hand position during a handshake.
Although the brachioradialis is primarily a muscle of elbow flexion, it is also involved in stabilizing the elbow during various tasks and positions.
It is one of the few muscles that can be activated more effectively in the absence of heavy weight, making it important for rehabilitation exercises.
Despite being located in the forearm, the brachioradialis plays a significant role in the overall mechanics of the arm's movement.