1. THE ELBOW: Muscles

2. MUSCLES Biceps brachii Brachialis Brachioradialis Pronator teres
Pronator quadratus
Supinator
Triceps
Anconeus

4. Biceps Brachii Origin Insertion Actions
Short = Coracoid process
Long = Lip of glenoid fossa
Insertion
Radial tuberosity
Actions
Flexion of elbow
Supination of forearm
[Weak flexion of shoulder]
Stronger with forearm supinated e.g. pull-ups

6. Brachialis Origin Insertion Actions Pure elbow flexor
Distal half of anterior surface of humerus
Insertion
Coronoid process
Actions
Flexion of elbow
Pure elbow flexor
Isolated somewhat with the forearm pronated

8. Brachioradialis Origin Insertion Actions
Anterior to elbow joint
Origin
Lateral ridge of distal humerus
Insertion
Lateral surface of distal radius near the styloid process
Actions
Flexion of elbow
Supination of forearm
Pronation of forearm
Most effective as a flexor with forearm in neutral forearm position

10. Pronator Teres Origin Insertion Actions
Medial epicondyle of humerus; Coronoid process of ulna
Insertion
Lateral surface of mid-shaft of radius
Actions
Pronation
[Weak flexion]

11. Pronator Quadratus Origin Insertion Actions
Distal, anterior end of ulna
Insertion
Distal, anterior end of radius
Actions
Pronation
Removing a screw with the right hand

13. Supinator Origin Insertion Actions Inserting a screw with right hand
Lateral epicondyle, Posterior-lateral surface of ulna
Insertion
Proximal, lateral surface of the radius
Actions
Supination
Inserting a screw with right hand

15. Triceps Brachii Origin Insertion Actions Long = Lip of glenoid fossa
Lateral = Proximal, posterior surface of humerus
Medial = Distal ⅔ of posterior surface or humerus
Insertion
Olecranon process of ulna
Actions
Extension of elbow
[Long head extension of shoulder and adduction of the shoulder.]

16. Triceps Brachii Pushing movements Throwing motions Push-ups
Bench press
Dips
Overhead press
Throwing motions

18. Anconeus Origin Insertion Actions Lateral epicondyle
Lateral side of olecranon process
Actions
Extension of elbow