Upper Extremities (Clavicle)

Upper Extremities (Clavicle)

Acromion

Is the anterior projection from the lateral end of the spine of scapula. It is continuous medially witgh the spine of the scapula at the acromial angle and extends anteriorly over the glenohumeral (shoulder) joint.

Acromion

Consists of medial and lateral borders, which define its superior and inferior surfaces

Coracoid process

Is the thick, curved, anterior projection that extends from the head and neck of the scapula. It provides origin sites for the coracobrachialis and short head bc9ieps brachii muscles, and insertion site for the pectoralis minor muscle. It also provide attachment sites for the coracoacromial, coracohumeral and coracoclavicular ligaments.

Neck

Is the constricted, medial part of the lateral angle of the bone. It is continuous;

medially. with the body of the scapula;

laterally, with t he head of the scapula;

anteriorly, with the coracoid process

Inferior angle

Is the blunt area of the bone where its medial and lateral borders meet. it is located superficial to the seventh rib or the seventh intercostal space and is one of the three angles of the scapula, and the other two being the superior and lateral angles.

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Provides an insertion site for the serratus anterior muscle

Inferior angle

Provides an insertion site for the serratus anterior muscle

Inferior angle

Is the blunt area of the bone where its medial and lateral borders meet. it is located superficial to the seventh rib or the seventh intercostal space and is one of the three angles of the scapula, and the other two being the superior and lateral angles.

Lateral Border

Is the thick, laterally located edge of the bone. It extends from the lateral angle of the scapula to its inferior angle. It is one of three borders of the scapula, the other two being the superior and medial borders/

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Provides origin sites for the teres major and teres minor muscles.

Lateral Border

Also known as axillary margin or border of scapula

Lateral border

Provides origin sites for the teres major and teres minor muscles.

Medial Border

Also known as vertebral border or vertebral margin

Medial Border

Is the thin, medially located edge of the bone. It extends from the superior angle of the scapula to it inferior angle and is longest of three borders of the scapula, the other two being the lateral and superior borders.

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Provides insertion sites for the serratus anterior, levator scapulae, rhomboid major, and rhomboid minor muscles.

Medial Border

Provides insertion sites for the serratus anterior, levator scapulae, rhomboid major, and rhomboid minor muscles.

Medial Border

Is the thin, medially located edge of the bone. It extends from the superior angle of the scapula to its inferior angle and is longest of three borders of the scapula, the other two being the lateral and superior borders.

Suprascapular notch

Is the indentation found along the lateral area of the superior edge of the scapula. It is continuous:

medially, with the superior;

laterally, with the base of the coracoid process.

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Is converted into the suprascapular foramen by the superior transverse scapular ligament, which transmits the suprascapular nerve and vessels.

Suprascapular notch

Is converted into the suprascapular foramen by the superior transverse scapular ligament, which transmits the suprascapular nerve and vessels.

Suprascapular notch

Is the indentation found along the lateral area of the superior edge of the scapula. It is continuous:

medially, with the superior;

laterally, with the base of the coracoid process.

Superior angle

Is the sharp area of the bone where its medial and superior borders meet. It is located superficial to the second rib and is one of the three angles of the scapula, the other two being the inferior and lateral angles.

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Provides and insertion site for the levator scapulae muscle.

Superior angle

Provides and insertion site for the levator scapulae muscle.

Superior angle

Is the sharp area of the bone where its medial and superior borders meet. It is located superficial to the second rib and is one of the three angles of the scapula, the other two being the inferior and lateral angles.

Superior border

is the thin superiorly located edge of the bone. it extends from the superior angle of the scapula to its superior scapular notch and is the shortest of the three borders of the scapula, the other two being medial and lateral borders.

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provides an origin site for the inferior belly of the omohyoid muscle

Superior border

provides an origin site for the inferior belly of the omohyoid muscle

Superior border

is the thin superiorly located edge of the bone. it extends from the superior angle of the scapula to its superior scapular notch and is the shortest of the three borders of the scapula, the other two being medial and lateral borders.

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acromialal angle

is the blunt, subcutaneous area of the scapula where the lateral border of acromion becomes continuous with the crest of the spine of the scapula.

glenoid fossa

is the pear-shaped, slightly concave, anteriorlaterally facing, articular area found on the lateral aspect of the head of the scapula. it articulates with the head of the humerus, forming the glenohumeral (shoulder) joint. its margin is covered with a fibrocartilaginous glenoid labrum, which deepens the concavity of the glenoid fossa, thereby improving the stability of the glenohumeral joint.

Infraglenoid tubercle

Is the rough prominence found along the inferior portion of the head of the scapula. it is located inferior to the glenoid fossa and provides an origin site for the long head of triceps brachii muscle

Infraspinous fossa

is the lower, slightly concave area on the dorsal surface of the scapula. it is located inferior to the spine of the scaspu;a and is the ;arger of the two fossae found on the dorsal surface, the other being the supraspinous fossa

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It contains the nutrient foramen of the scapula and provides the origin site for the infraspinatus muscle.

Infraspinous fossa

It contains the nutrient foramen of the scapula and provides the origin site for the infraspinatus muscle.

Infraspinous fossa

is the lower, slightly concave area on the dorsal surface of the scapula. it is located inferior to the spine of the scapula and is the larger of the two fossae found on the dorsal surface, the other being the supraspinous fossa

Spine of the scapula

Is the triangular, shelf-like plate that projects from the superior area of the dorsal surface of the scapula. The apex of this triangle is located along the medial border of the scapula and extends laterally towards its base, which itself is continuous laterally with the acromion. it consists of two borders.

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It provides attachment an origin site for the deltoid muscle and an insertion site for the trapezius muscle.

Spine of the scapula

Is the triangular, shelf-like plate that projects from the superior area of the dorsal surface of the scapula. The apex of this triangle is located along the medial border of the scapula and extends laterally towards its base, which itself is continuous laterally with the acromion. it consists of two borders.

Spine of the scapula

It provides attachment an origin site for the deltoid muscle and an insertion site for the trapezius muscle.

Subscapular fossa

Is the concave area that occupies almost the entire costal surface of the scapula. It consists of ridges that travel in an inferomedial direction along the fossa. These ridges provide origin sites for the subscapularis muscle.

Superaglenoid tubercle

is the small, rough prominence found along the superior portion of the head of the scapula. it is located superior to the glenoid fossa and provides and origin site for the long head of biceps brachii muscle

Supraspinous fossa

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is the upper, deeply concave area on the dorsal surface of the scapula. it is located superior to the spine of the scapula and is the smaller of the two fossae found on the dorsal surface, the other being the infraspinous fossa.

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It provides an origin site for the supraspinatus muscle.