Latissimus Dorsi

The Latissimus Dorsi (pronounced: la-tis-i-mus dor-si) is a large, flat muscle on the back that stretches to the sides, behind the arm, and is partly covered by the Trapezius on the back near the midline.

Etymology

The term "Latissimus Dorsi" originates from the Latin words "latus" meaning 'broad' and "dorsum" meaning 'back', referring to the broad muscle on the back.

Function

The Latissimus Dorsi is responsible for extension, adduction, transverse extension also known as horizontal abduction, flexion from an extended position, and (medial) internal rotation of the shoulder joint. It also has a synergistic role in extension and lateral flexion of the lumbar spine.

Related Terms

Trapezius: A large muscle extending down the back of the neck and upper spine, with which the Latissimus Dorsi is partly covered.
Rhomboids: Muscles that connect the scapula with the vertebrae of the spinal column, located in close proximity to the Latissimus Dorsi.
Teres Major: A muscle of the upper limb and one of the seven scapulohumeral muscles. It is a thick but somewhat flattened muscle, which is located medial to the Latissimus Dorsi.
Scapula: The bone to which the Latissimus Dorsi muscle is attached.
Humerus: The bone of the upper arm or forelimb, forming joints at the shoulder and the elbow, where the Latissimus Dorsi muscle is attached.

External links

Medical encyclopedia article on Latissimus Dorsi
Wikipedia's article - Latissimus Dorsi

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Latissimus Dorsi