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The superior angle of the scapula is thin, smooth, rounded, and inclined somewhat lateralward, and gives attachment to a few fibers of the levator scapulae muscle. [5] The inferior angle of the scapula is the lowest part of the scapula and is covered by the latissimus dorsi muscle. It moves forwards round the chest when the arm is abducted.
The supraspinous fossa is bounded by the spine of scapula on the inferior side, acromion process on the lateral side and the superior angle of scapula on the superior side. Supraspinatus muscle originates from the supraspinous fossa. Distal attachment of the levator scapulae muscle is also on the medial aspect of the fossa.
Superior part of medial border of scapula: Artery: Dorsal scapular artery: Nerve: Cervical nerve (C3, C4) and dorsal scapular nerve (C5) Actions: Elevates scapula and tilts its glenoid cavity inferiorly by downwardly rotating the scapula: Identifiers; Latin: musculus levator scapulae: TA98: A04.3.01.009: TA2: 2234: FMA: 32519: Anatomical terms ...
The root of the spine of the scapula is the most medial part of the scapular spine. It is termed "triangular area of the spine of scapula", based on its triangular shape giving it distinguishable visible shape on x-ray images. [1] The root of the spine is on a level with the tip of the spinous process of the third thoracic vertebra. [2]
During this tilting, the scapula rotates to a maximum angle of 60° about an axis passing perpendicularly through the bone slightly below the spine; this causes the inferior angle to move 10 to 12 centimetres (3.9 to 4.7 in) and the lateral angle 5 to 6 centimetres (2.0 to 2.4 in). [4]: 40
The coracoid process acts as an attachment and origin for a large number of muscles (attached muscles not labeled here). The coracoid process is a thick curved process attached by a broad base to the upper part of the neck of the scapula; [2] it runs at first upward and medially; then, becoming smaller, it changes its direction, and projects forward and laterally.
The muscle is inserted along the medial border of the scapula between the superior and inferior angle of the scapula. The muscle is divided into three parts according to the points of insertion: [1] the serratus anterior superior is inserted near the superior angle; the serratus anterior intermediate is inserted along the medial border;
Type I: Notch is absent. The superior border forms a wide depression from the medial angle to the coracoid process. Type II: Notch is a blunted V-shape occupying the middle third of the superior border. Type III: Notch is U-shaped with nearly parallel margins. Type IV: Notch is V-shaped and very small.