Triceps brachii muscle
Triceps Brachii Muscle
The Triceps brachii muscle is a large, three-headed muscle located at the back of the upper arm. It is responsible for the extension of the elbow joint and is a crucial muscle in the upper body.
Anatomy[edit | edit source]
The triceps brachii muscle consists of three parts: the long head, the lateral head, and the medial head. Each head originates from a different location and all converge to insert at the elbow.
Long Head[edit | edit source]
The long head originates from the infraglenoid tubercle of the scapula. It is unique as it crosses two joints, the shoulder and the elbow.
Lateral Head[edit | edit source]
The lateral head originates from the posterior surface of the humerus, superior to the radial groove.
Medial Head[edit | edit source]
The medial head originates from the posterior surface of the humerus, inferior to the radial groove.
Function[edit | edit source]
The primary function of the triceps brachii muscle is to extend the elbow. It also assists in stabilizing the shoulder joint and aids in movements of the forearm.
Clinical Significance[edit | edit source]
Injuries to the triceps brachii muscle can result in a loss of arm extension and can affect the ability to push and pull. Treatment typically involves rest, physical therapy, and in severe cases, surgery.
See Also[edit | edit source]
References[edit | edit source]
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Contributors: Prab R. Tumpati, MD