Brachialis muscle

Brachialis muscle

File:Brachialis muscle front.png

Brachialis muscle (shown in red). Image via Gray's Anatomy.

The Brachialis muscle is a muscle in the upper arm that flexes the elbow joint. It lies deeper than the Biceps brachii, and makes up part of the floor of the Cubital fossa.

Structure

The brachialis originates from the anterior surface of the Humerus, particularly the distal half of this bone. Its fibers converge towards its distal tendon, and is inserted into the coronoid process and the tuberosity of the Ulna.

Function

The brachialis is the primary flexor of the elbow. Despite its size relative to the larger biceps brachii, the brachialis is the prime mover in elbow flexion due to its advantageous positioning and length.

Clinical significance

Injury to the brachialis muscle is relatively rare but can occur in certain sports or activities that involve a high degree of elbow flexion and extension. Symptoms of a brachialis muscle injury can include pain, swelling, and a loss of movement or strength.

See also

• Muscles of the upper limb
• Elbow

External links

• Brachialis muscle at AnatomyExpert.com

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