Practical 2

Vocabulary flashcards covering the origins, insertions, and primary actions of the shoulder muscles listed in Practical Exam #2.

Supraspinatus

Origin: Supraspinous Fossa of the Scapula

Insertion: Greater Tubercle of the Humerus

Action: Abduct the shoulder.

Infraspinatus

Origin: Infraspinous Fossa of the Scapula

Insertion: Greater Tubercle of the Humerus

Action: Laterally rotate the shoulder; Adduct the shoulder.

Teres Minor

Origin: Superior, Lateral Border of the Scapula

Insertion: Greater Tubercle of the Humerus

Action: Laterally rotate the shoulder; Adduct the shoulder.

Subscapularis

Origin: Subscapular Fossa of the Scapula

Insertion: Lesser Tubercle of the Humerus

Action: Medially rotate the shoulder.

Biceps Brachii

Origins: Supraglenoid Tubercle of the Scapula and Coracoid Process of the Scapula

Insertion: Radial Tuberosity

Action: Flex the shoulder; Flex the elbow; Supinate the forearm.

Triceps Brachii

Origins: Infraglenoid Tubercle of the Scapula and Posterior Humerus.

Insertion: Olecranon Process

Action: Extend the shoulder; Extend the elbow.

Deltoid

Origins: Lateral third of the Clavicle, Acromion Process, Spine of Scapula.

Insertion: Deltoid Tuberosity

Action: Abduct the shoulder.

Pectoralis Major

Origins: Medial ½ of Clavicle, Sternum, and Cartilage of Ribs 1-6

Insertion: Crest of the Greater Tubercle of the Humerus

Action: Adduct the shoulder; Medially rotate the shoulder.

Pectoralis Minor

Origins: Ribs 3-5

Insertion: Coracoid Process of the Scapula

Action: Depress the scapula; Abduct the scapula.

Coracobrachialis

Origins: Coracoid Process of the Scapula

Insertion: Mid-Medial Shaft of the Humerus

Action: Flex the shoulder; Adduct the shoulder.