Upper Extremity Anatomy Review

Origins

100

Originates on the supraglenoid tubercle of the scapula

long head of the biceps brachii

200

Originates on the spinous processes of T2–T5 vertebrae

Rhomboids Major

300

Originates on the lateral epicondyle of humerus & lateral border of ulna

Supinator

400

Originates on the lateral Epicondyle of humerus and the supracondylar ridge of the humerus.

Extensor carpi radialis longus.

500

Originates on the posterior surface of the humerus, inferior to the radial groove.

Medial head of the triceps brachii.

Insertions

100

Deltoid tuberosity of the humerus

Deltoid (all fibers)

200

Medial lip of the bicipital groove of the humerus

Latissimus Dorsi

300

About 15-20% of people are born without one of these forearm flexors

Palmaris longus

400

Tuberosity and coronoid process of ulna

Brachialis

500

Dorsal aspect of the base of the second metacarpal

Extensor carpi radialis longus

Actions

100

Prime movers of external/lateral rotation of the GH joint.

Teres Minor and Infraspinatus

200

Prime mover of internal/medial rotation of the GH joint

Subscapularis

300

Prime mover of protraction of the scapula

Serrates Anterior

400

This muscle has two synergistic properties and they both work together to help accomplish upward rotation of the scapula

Upper and Lower Trapezius

500

This muscle aides in supination when hand is in a pronated position and aides in pronation when hand is in a supinated position.

Brachioradialis

Nerves

100

Extensor digitorum innervation

Radial Nerve

200

Flexor pollicis longus is innervated by which nerve?

Median Nerve (C8 and T1)

300

Coracobrachialis nerve innervation

Musculocutaneous

400

Innervation of the Latissimus Dorsi

Thoracodorsal nerve

500

Pronator teres innervation

Median nerve

Random

100

These 3 muscles insert at or on the bicipital groove of the humerus.

Pectoralis Major, Latissimus Dorsi, Teres Major

200

This muscle is the only rotator cuff muscle not involved in rotation.

Supraspinatus

300

Infraspinatus inserts on the ________________

Greater tubercle of the humerus.

400

This nerve innervates both the infraspinatus and supraspinatus.

Suprascapular nerve

500

These are the actions of pectoralis minor

Depress, abduct, and downwardly rotate the scapula (S/T joint)