Elbow Anatomy

1
Elbow Anatomy
2
Bone Anatomy

• Radius
• Proximal
• Radial Head
• Radial Tuberosity
• Radial Neck
• Distal
• Ulnar Notch
• Radial styloid process

3
Bone Anatomy

• Ulna
• Proximal
• Olecranon
• Olecranon Process
• Coronoid Process
• Trochlear notch
• Radial notch
• Ulnar tuberosity
• Distal
• Ulnar Styloid Process

4
Elbow Articulations

• Humeroulnar Joint
• Humeroradial Joint
• Proximal Radioulnar Joint
• Distal Radioulnar Joint

5
Ligamentous Support

• Capsule

posterior
anterior
6
Ligamentous Support

• Medial (Ulnar) Collateral Ligament
• Anterior
• Posterior
• Oblique

7
Ligamentous Support

• Lateral (Radial) Collateral Ligament

8
Ligamentous Support

• Annular Ligament

9
Ligamentous Support

• Quadrate Ligament

10
Ligamentous Support

• Dorsal and Plamar Radioulnar Ligaments

11
Ligamentous Support

• Interosseous Membrane

12
Muscles
13
Biceps Brachii

• O
• Short head coracoid process
• Long head supraglenoid tubercle of scapula
• I
• Radial tuberosity
• Biceps brachii aponeurosis
• N Musculocutaneous
• F
• Shoulder flexion
• Elbow flexion, forearm supination

14
Brachialis

• O
• Distal 2/3 anterior humerus
• I
• Ulna tuberosity
• Coronoid process
• N
• Musculocutaneous
• F
• Elbow flexion

15
Triceps Brachii

• O
• Long Head infraglenoid tubercle
• Lateral Head lateral and posterior surface of
  proximal ½ of body of humerus
• Medial Head distal 2/3 of medial and posterior
  surfaces of humerus below radial groove
• I
• Posterior surface of olecranon proess
• N Radial
• F
• Shoulder long head Ext and ADD
• Elbow -- extension

16
Anconeus

• O
• Posterior lateral humeral epicondyle
• I
• Lateral side of olecranon process
• Upper ¼ posterior ulnar body
• N
• Radial
• F
• Assist with elbow extension

17
Brachioradialis

• O
• Upper 2/3 of lateral humeral supracondylar ridge
• I
• Lateral radius just proximal to base of styloid
  process
• N
• Radial
• F
• Elbow flexion
• Supination to midposition
• Pronation to midposition

18
Supinator

• O
• Lateral humeral epicondyle
• LCL
• Annular ligament
• I
• Lateral upper 2/3 of radius
• N
• Radial
• F
• Forearm supination

19
Extensor Carpi Radialis Longus

• O
• Lower 1/3 of lateral supraconsylar ridge
• I
• Dorsal surface of base of 2nd metacarpal
• N
• Radial
• F
• Wrist extension
• Wrist radial deviation
• Elbow flexion

20
Extensor Carpi Radialis Brevis

• O
• Lateral epicondyle of humerus
• I
• Dorsal surface of base of 3rd metacarpal
• N
• Radial
• F
• Wrist extension
• Wrist radial deviation
• Elbow flexion

21
Extensor Digitorum Communis

• O
• Lateral humeral epicondyle
• I
• Extensor expansions of digits 2-5
• N
• Posterior interosseus nerve (continuation of
  radial)
• F
• 2-5 MCP extension
• 2-5 IP extension

22
Extensor Carpi Ulnaris

• O
• Lateral humeral condyle
• I
• Posterior base of 5th metacarpal
• N
• Posterior interosseus
• F
• Wrist extension
• Wrist ulnar deviation

23
Pronator Teres

• O
• Medial humeral epicondyle
• Coronoid process
• I
• Lateral radius near its center
• N
• Median
• F
• Forearm pronation
• Elbow flexion

24
Flexor Carpi Radialis

• O
• Medial humeral epicondyle
• I
• Palmar surface at base of 2nd metacarpal
• Slip to base of 3rd metacarpal
• N
• Median
• F
• Wrist flexion
• Wrist radial deviation
• Elbow flexion

25
Palmaris Longus

• O
• Medial humeral epicondyle
• I
• Palmar aponeurosis
• Wrist flexor retinaculum
• N
• Median
• F
• Wrist flexion
• Elbow flexion

26
Flexor Carpi Ulnaris

• O
• medial epicondyle of humerus
• olecranon and posterior border of ulna
• I
• Pisiform bone, hook of hamate bone, and 5th
  metacarpal bone
• N
• Ulnar
• F
• Wrist flexion
• Ulnar deviation
• Elbow flexion

27
Pronator Quadratus

• O
• Distal ¼ anterior ulna
• I
• Distal ¼ anterior radius
• N
• Anterior interosseus (median)
• F
• Forearm pronation