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The latissimus dorsi and teres major also aid in adduction and medial rotation of the arm, so they may be able to compensate for the lack of extra muscle. However, some patients with Poland's syndrome may also be lacking these muscles, which make these actions nearly impossible.
The latissimus dorsi can be remembered best for insertion as "A Miss Between Two Majors". As the latissimus dorsi inserts into the floor of the intertubercular groove of the humerus it is surrounded by two major muscles. The teres major inserts medially on the medial lip of the intertubercular groove and the pectoralis major inserts laterally ...
subscapularis, pectoralis major, latissimus dorsi: 2 1 teres minor: Upper limb, Shoulder, rotator cuff, Right/left lateral border of scapula: inferior facet of greater tubercle of humerus: posterior circumflex humeral artery, circumflex scapular artery: axillary nerve: laterally rotates and adducts humerus: subscapularis, pectoralis major ...
Pectoralis minor is a thin, triangular muscle located beneath the pectoralis major. It attaches to the ribs, and serves to stabilize the scapula, the large bone of the shoulder. The pectoral fascia is a thin layer of tissue over the pectoralis major, extending toward the latissimus dorsi muscle on the back.
This makes the deltoid an antagonist muscle of the pectoralis major and latissimus dorsi during arm adduction. The anterior fibers assist the pectoralis major to flex the shoulder. The anterior deltoid also works in tandem with the subscapularis, pecs and lats to internally (medially) rotate the humerus. The intermediate fibers perform basic ...
Teres major [1] Latissimus dorsi [1] Pectoralis major [1] of thigh/femur at hip [2] Tensor fasciae latae; Gluteus generalis; Anterior fibers of Gluteus meralis; Adductor longus and Adductor brevis; of leg at knee [3] Popliteus; Semimembranosus; Semitendinosus; Sartorius; of eyeball (motion is also called "intorsion" or incyclotorsion) [4 ...
Medial rotation is carried out by the anterior fibres of the deltoid, teres major, subscapularis, pectoralis major and the latissimus dorsi. Lateral rotation is carried out by the posterior fibres of the deltoid, infraspinatus and the teres minor. Circumduction of the shoulder (a combination of flexion/extension and abduction/adduction).
Shoulder adductors include: Pectoralis Major Latissimus Dorsi Teres Major Subscapularis Coracobarchialis Pages in category "Shoulder adductors" The following 3 pages are in this category, out of 3 total.