1. Elbow: Anatomy

2. Bony Anatomy Radius Ulna Humerus – 2 condyles Lateral – capitulum
Articulates with the radius
Medial – trochlea
Articulates with humerous

3. Ligaments Ulnar collateral Radial collateral Annular
Medial epicondyle to ulnar trochlear notch
Strong anterior band, weaker transverse & middle
Gives medial support
Radial collateral
Lateral epicondyle to side of annular ligament
Does not attach to radius
Gives lateral support
Annular
Holds radius to ulna and humerus
Allows rotation of radius (supination and flexion)
Gives lateral support

4. Muscles Flexion Extension Pronation Supination
Biceps brachii, brachial, brachioradialis
Extension
Triceps brachii
Pronation
Pronator quadratus, pronator teres
Supination
Biceps brachii, supinator muscle

5. Muscles Biceps brachii Brachialis Brachioradialis Triceps brachii
Insertion
Tuberosity of the radius
Movement
Flexes elbow, supinates forearm
Brachialis
Coronoid process of ulna
Flexes elbow
Brachioradialis
Insertion
Styloid process of the raidus
Movement
Flexes elbow
Triceps brachii
Olecranon process of ulna
Extension

6. Muscles Supinator Pronator teres Anconeus Insertion Movement Insertion
Proximal end of the lateral surface of the shaft of the radius
Movement
Supinates the elbow
Pronator teres
Middle of the lateral surface of the shaft of the radius
Pronates elbow
Anconeus
Insertion
Lateral surface of the olecranon process of the ulna
Movement
Extends elbow

7. Joints Humeroradial Radioulnar Humeroulnar
Articulation of lateral distal humerus and proximal radius
Radioulnar
Articulation between radial notich of the proximal lateral aspect of ulna, the radial head and capitulum of distal humerus
Important in supination andpronation
Humeroulnar
Articulation between distal humerus medially and proximal ulna

8. Nerves Median Radial Ulnar Musclocutaneous
Passes deep in the cubital fossa medial to the biceps and brachialis
Radial
Lateral to biceps and brachialis
Ulnar
Courses posteriorly in groove between the medial epicondyle and olecranon process
Musclocutaneous
Passes through cubital fossa, supplies the anterior forearm and thenar muscles

13. Elbow Anatomy
MISC
Medial & lat. Condyles with the olecranon process form a straight line when arm is straight
Forms a triangle when arm is bent
Posterolateral triangle – radial head, lat. Condyle, olecronon process
Good place for aspiration

14. Elbow Anatomy Carrying angle ROM 5-15 degrees female 5-10 degrees male
This angle will increase in athletes that have participated in throwing sports for a long time, or the angle could increase if there is a fx
ROM
Flexion – 145 degrees
Extension – 0 / -5 degrees
Pronation & supination – 90 degrees

15. Pronation and Supination
Flexion and Extension
Pronation and Supination