BIOS 311, Origins & Insertions of the Upper Extremity

Coracobrachialis origin?

Coracoid process of the scapula

Pectoralis minor insertion?

Coracoid process of the scapula

Biceps brachii short head origin?

Coracoid process of the scapula (they are "short heads", so they do not go far, they go to the closest protrusion of the scapula, the coracoid process)

Deltoid insertion?

Deltoid tuberosity of the humerus

Extensor carpi radialis longus insertion?

Dorsal surface of the base of the 2nd metacarpal

Extensor carpi radialis brevis insertion?

Dorsal surface of the base of the 3rd metacarpal

Extensor carpi ulnaris insertion?

Dorsal surface of the base of the 5th metacarpal

Supraspinatus/Infraspinatus/Teres minor insertion?

Greater tubercle of the humerus (they all come off scapula to closest spot on humerous)

Triceps brachii long head origin?

Infraglenoid tubercle of the scapula

Infraspinatus origin?

Infraspinous fossa of the scapula

Pectoralis major/Latissimus dorsi/Teres major insertion?

Intertubercular groove of the humerus

Subscapularis insertion?

Lesser tubercle of the humerus *(sub=below=lesser)

Serratus anterior insertion?

Medial border of the scapula

Triceps brachii insertion?

Olecranon of the ulna

Flexor pollicis longus insertion?

Palmar surface of the 1st distal phalanx

Flexor digitorum profundus insertion?

Palmar surfaces of the distal phalanges of digits 2-5

Flexor digitorum superficialis insertion?

Palmar surfaces of the middle phalanges of digits 2-5

Biceps brachii (long/short heads) insertion?

Radial tuberosity (biceps brachii are less deep than brachiallis, so the biceps brachii muscles both attach to the less deep tuberosity, which is the radial tuberosity)

Serratus anterior origin?

Ribs 1-9

Pectoralis minor origin?

Ribs 3, 4, and 5

Subscapularis origin?

Subscapular fossa

Biceps brachii long head origin?

Supraglenoid tubercle of the scapula

Supraspinatus origin?

Supraspinous fossa of the scapula

Brachialis insertion?

Ulnar tuberosity/coronoid process of the ulna (ulna is further than radius, and brachiallis is deep to the biceps, so it inserts at the further tuberosity, which is the ulnar tuberosity)