087 The Superficial Extrinsic Shoulder Muscles

Leslie Samuel discusses the superficial extrinsic shoulder muscles, focusing on the trapezius and latissimus dorsi. The video covers the origins, insertions, and actions of these muscles. The trapezius is described as a complex muscle with various actions depending on which part contracts, including elevation, retraction, and depression of the scapula. The latissimus dorsi is explained in terms of its wide origin and insertion on the humerus, with actions such as adduction, internal rotation, and extension of the arm. The video concludes with a review of these concepts.

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