Region: Scapular region

Infraspinatus

Infraspinatus The structure indicated is the infraspinatus muscle of the rotator cuff. The infraspinatus muscle is one of the four muscles of the rotator cuff. The rotator cuff muscles are located in the posterior scapula region and serve to stabilise the glenohumeral joint. There are 4 rotator cuff muscles which can be remembered using the mnemonic SITS: Supraspinatus Infraspinatus Teres minor Subscapularis The supraspinatus and infraspinatus, as their names suggest originate in the fossae above and below the spine of the scapula respectively (supraspinatous and infraspinatous fossae). The supraspinatus, infraspinatus and teres minor muscles insert on to the greater tubercle …

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Infraspinatus

Teres Minor

Teres Minor The structure indicated is the teres minor muscle. The teres minor muscle is one of the four muscles of the rotator cuff. The rotator cuff muscles are located in the posterior scapula region and serve to stabilise the glenohumeral joint. There are 4 rotator cuff muscles which can be remembered using the mnemonic SITS: Supraspinatus Infraspinatus Teres minor Subscapularis The supraspinatus and infraspinatus, as their names suggest originate in the fossae above and below the spine of the scapula respectively (supraspinatous and infraspinatous fossae). The supraspinatus, infraspinatus and teres minor muscles insert on to the greater tubercle of …

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Teres minor

Supraspinatus

Supraspinatus The structure indicated is the supraspinatus muscle. The supraspinatus muscle is one of the four muscles of the rotator cuff. The rotator cuff muscles are located in the posterior scapula region and serve to stabilise the glenohumeral joint. There are 4 rotator cuff muscles which can be remembered using the mnemonic SITS: Supraspinatus Infraspinatus Teres minor Subscapularis The supraspinatus and infraspinatus, as their names suggest originate in the fossae above and below the spine of the scapula respectively (supraspinatous and infraspinatous fossae). The supraspinatus, infraspinatus and teres minor muscles insert on to the greater tubercle of the humerus on …

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supraspinatus

Superior Angle of Scapula

Superior Angle of Scapula The superior angle of the scapula is indicated in the diagram. The scapula is a bone that connects the humerus with the clavicle. The scapula consists of two surfaces: Costal Posterior The scapula has three borders: Superior Medial Lateral The scapula has three angles: Superior Inferior Lateral The superior angle of the scapula is covered by the trapezius muscle. It is formed at the point where the medial and lateral borders meet and provides attachment for the levator scapulae muscle and omohyoid muscle. Learn more about the anatomy of the scapula in this tutorial

superior angle of scapula

Teres Major

Teres Major The structure indicated is the teres major muscle. The teres major muscle is located in the posterior scapular area. It originates on the inferior angle of the scapula and inserts anteriorly on the humerus on the intertubercular sulcus. Contraction of the teres major causes extension and medial rotation of the humerus at the glenohumeral joint. Origin:  Inferior angle of scapula Insertion: Medial portion of intertubercular sulcus of humerus Action: Adduction, medial rotation, extension of humerus Innervation: Lower subscapular nerve The pectoralis major inserts on the lateral part of the intertubercular sulcus and the latissimus dorsi inserts on the …

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Teres Major

Infraspinous Fossa

Infraspinous Fossa The structure indicated is the infraspinous fossa of the scapula. It is called the infraspinous fossa because it lies below (infra) the spine of the scapula (-spinous). Accordingly, the fossa that lies superior to the spine of the scapula is the supraspinous fossa. The scapula consists of two surfaces – the costal surface and the posterior surface. The infraspinous fossa is significantly larger than the supraspinous fossa and comprises the majority of the posterior surface of the scapula. The infraspinatus muscle, one of the rotator cuff muscles, originates in the infraspinous fossa. Learn all about the anatomy of …

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Infraspinous Fossa

Suprascapular Notch

Suprascapular Notch The structure indicated is the suprascapular notch. The suprascapular notch is a notch in the superior border of the scapula, and lies medial to the base of the coracoid process. The superior transverse scapular ligament runs across the top of the notch, converting it into an opening, or foramen. Below this ligament, the suprascapular nerve passes through. Above this ligament, the transverse scapular vessels pass.

Suprascapular Notch

Rotator Cuff

3D video anatomy tutorial on the rotator cuff muscles of the shoulder.

Rotator Cuff Tutorial