scapula

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

Serratus Anterior

Serratus Anterior The structure indicated is the serratus anterior muscle. The serratus anterior muscle originates on the first to eighth ribs laterally on the chest and inserts medially on the scapula. The serratus anterior is divided into three parts: Serratus anterior superior Serratus anterior intermediate Serratus anterior inferior The serratus anterior is often called the “boxer’s muscle” as it is responsible for protraction of the scapula – a movement which occurs when throwing a punch. Origin: fleshy slips from lateral parts of 1st to 8th ribs Insertion: Medial margin of scapula on anterior surface Innervation: Long thoracic nerve Action: Protraction …

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Serratus Anterior

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