Omoplate — Wikipedia

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Scapula

Details
Articulation
Element of	Pectoral belt bone ( d)
Various components	Make costals from scapula ( d) , dorsal face of the scapula ( d) , acromion, medial edge of the scapula ( d) , higher-medial angle of La Scapula ( d) , higher-lateral angle of La Scapula ( en) , upper edge of the scapula ( d) , lateral edge of the scapula ( d) , lower angle of the scapula ( d)

The scapula (You Latin scapula “Shoulder”) or scapula (In old nomenclature, from the Greek Ωμος “shoulder” and πλάτη “flat object”) is a flat, peer and triangular bone. It is located at the postero-superior part of the chest, plated against the costal grill. It is articulated outside with the humerus and forward with the collarbone. The Scapula slips on the previous serrated muscle but does not be articulated with the rib cage. With the collarbone, it forms the scapular belt.

The scapula can be described by distinguishing it:

two sides:
- an earlier;
- a posterior;
Three edges:
- superior ;
- a medial;
- a lateral;
Three angles:
- a lower;
- a superro-medial;
- a superro-lateral.

Table of Contents

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Faces [ modifier | Modifier and code ]

Anterior face [ modifier | Modifier and code ]

The anterior side of the left scapula.

The anterior side of the left scapula.

The anterior or costal side is concave and looks forward, below and inside.

It forms the subcapular pit gives insertion to the subcapular muscle.

It is described 3 parts: a central part, a medial part and a lateral part.

Between the upper quarter and the lower 3/4 of the central part, there is a line of lateral depression corresponding to the insertion of the anterior edge of the spine of the Scapula.

The lower part is concave and traversed by ridges corresponding to the insertion of the tendon blades of the subcapular muscle.

Parallel to the lateral edge, the lateral part is thick and constitutes one of the pillars of the Scapula.

The medial part is extended to its ends. It gives insertion to the previous serrated muscle.

Posterior [ modifier | Modifier and code ]

The posterior surface is generally convex and shared in half with the union of its upper quarter and its lower three-quarters by a bone blade directed perpendicular to the surface: the spine of the Scapula.

The part located above the thorn is flat and smooth. It forms the supra-spine pit and receives the insertion of the supra-spinous muscle in its medial part.

A more or less marked bone crest separates a side part which receives the insertions of the small round and large round muscles.

The scapular spine, of triangular shape, receives the insertion of the posterior part of the deltoid muscle on its lower edge and the trapezoid muscle on its upper edge. Its posterior edge extends outside and forward by the acromion.

Edges [ modifier | Modifier and code ]

Upper edge [ modifier | Modifier and code ]

The upper edge extends between the two upper angles of La Scapula. It is oblique at the top and inside and separated from the coracoid process by the scapular incision.

He receives the insertions, from outside, the medium cervical fascia, the Omo-Hyoid muscle and the upper transverse ligament of the Scapula.

Medial edge [ modifier | Modifier and code ]

The medial edge or spinal edge extends between the upper-medial angle and the lower angle of the scapula.

It is convex inside. It gives insertion in its quarter upper the lift muscle of the Scapula and in the lower part remaining with the rhomboid muscle.

Lateral edge [ modifier | Modifier and code ]

The lateral or axillary edge between the lower edge of the glenoid cavity and the lower angle of the scapula. Very reinforced, it forms one of the pillars of the Scapula.

Its upper part presents the infraglénoidal tuber on which the brachial triceps muscle is inserted.

Angles [ modifier | Modifier and code ]

The lower angle (or Caudal angle or Pointe de la Scapula) at the junction of the medial and lateral edges gives insertion to the large dorsal muscle.

The upper-medial angle at the junction of the medial and superior edges gives insertion to the lifting muscle of La Scapula.

The higher-lateral angle at the junction of the lateral and superior edges is centered on the glenoid cavity of the Scapula which is part of the scapulo-human joint.

It composed of the Col de la Scapula, the coracoid process and the glenoid cavity.

The Col de la Scapula is the portion of flattened cylinder from front to back which connects the body of the scapula to the glenoid cavity. The lower transverse ligament of the Scapula is inserted there.

The glenoid cavity is a concave joint surface in the shape of a pear which responds to the humeral head. Above is the supraglenoidal tuber. This is the point of origin of the long leader of the brachial biceps muscle. On the anterior edge of the cavity insert the Gléno-Humeral ligaments.

On the upper side of the scapula pass, a bone outgrowth in the shape of a semi-fronted finger forms the coracoid process. He receives the insertions of the upper transverse ligament of the scapula and the coraco-humomeral ligament.