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The upper and lower fibers tend to rotate the scapula around the sternoclavicular articulation so that the acromion and inferior angles move up and the medial border moves down (upward rotation). The upper and lower fibers work in tandem with serratus anterior to upwardly rotate the scapulae, and work in opposition to the levator scapulae and ...
Costal aspect of medial margin of the scapula: Artery: Lateral thoracic artery, superior thoracic artery (upper part), thoracodorsal artery (lower part) Nerve: Long thoracic nerve (from roots of brachial plexus C5-C7) Actions: Protracts and stabilizes scapula, assists in upward rotation. Antagonist: Rhomboid major, rhomboid minor, trapezius ...
True abduction: supraspinatus (first 15 degrees), deltoid; Upward rotation: trapezius, serratus anterior Arm adduction [14] Arm adduction is the opposite motion of arm abduction. It can be broken down into two parts: downward rotation of the scapula and true adduction of the arm.
Like the original and modified Eden–Lange procedures, the levator scapulae is transferred to the scapular spine. In the T3 transfer, rather than transferring the rhomboids to the scapular fossae, they are transferred to the scapular spine, which better replicates the trapezius’ action of scapular upward rotation. [9]
The scapula (pl.: scapulae or scapulas [1]), also known as the shoulder blade, is the bone that connects the humerus (upper arm bone) with the clavicle (collar bone). Like their connected bones, the scapulae are paired, with each scapula on either side of the body being roughly a mirror image of the other.
protracts and stabilises scapula, assists in upward rotation rhomboid major, rhomboid minor, trapezius: 2 1 deltoid, clavicular/acromial/scapular spinal parts Upper limb, Shoulder, Right/left clavicle, acromion, spine of scapula: deltoid tuberosity of humerus: primarily posterior circumflex humeral artery: axillary nerve: abducts, flexes, and ...
Lower third of lateral border of scapula: Medial lip of bicipital groove of humerus Teres minor: Upper two thirds of lateral border of scapula Greater tubercle of humerus Lateral rotation (in abduction: 95°; in adduction: 70°) Infraspinatus: Infraspinous fossa of scapula Greater tubercle of humerus Teres minor
These muscles are responsible for several actions of the glenohumeral joint. The third group, which is mainly responsible for stabilization and rotation of the scapula, consists of the trapezius, serratus anterior, levator scapulae, and rhomboid muscles and attach to the medial, superior, and inferior borders of the scapula.