Shoulder and Upper Extremity Anatomy Flashcards
Coracobrachialis
Origin: coracoid process
Insertion: anteromedial surface of humorous
Action: weakly flexes and adducts the shoulder
Biceps Brachii
Origin: supraglenoid tubercle and coracoid process
Insertion: head of radius
Action: flexes shoulder and arm, supinates forearm
Brachialis
Origin: anterior surface of the distal 1/2 of the humerus
Insertion: coronoid process of ulna
Action: flexes arm
Brachordialis
Origin: distal 1/3 of lateral humerus
Insertion: styloid process of radius
Action: flexes forearm
Triceps
Origin: infraglenoid process posterior humerus
Insertion: olecranon process of ulna
Action: extends shoulder and extends elbow
Supraspinatus
Origin: supraspinous fossa of scapula
Insertion: greater tubercle of humerus
Action: abducts arm
Infraspinatus
Origin: infraspinous fossa of scapula
Insertion: greater tubercle of humerus
Action: externally rotates and adducts the shoulder
Teres Minor
Origin: lateral border of scapula
Insertion: greater tubercle of humerus
Action: externally rotates and adducts the shoulder
Subscapularis
Origin: sub scapular fossa of scapula
Insertion: lesser tubercle of humerus
Action: internally rotates arm
Anconeus
Origin: lateral epicondyle of humerus
Insertion: lateral portion of the olecranon process
Action: extension of forearm
Supinator
Origin: lateral epicondyle of humerus
Insertion: lateral shaft of proximal radius
Action: supination
Pronator Teres
Origin: medial epicondyle of humerus
Insertion: lateral shaft of radius
Action: pronation
Pectoralis Major
Origin: medial clavicle, sternum, and 1st-6 ribs
Insertion: bicipital groove
Action: flexion, adduction and medial rotation of humerus
Pectoralis Minor
Origin: ribs 3-5
Insertion: coracoid process
Action: protraction of scapula
