Download HEALTH SCIENCES 365

HEALTH SCIENCES 365
Chapter 6 – Elbow & Radioulnar Joints
Bones of the Elbow & Radioulnar Joints
Humerus
Radius
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Head
Neck
Radial Tuberosity
Ulnar Notch
Styloid Process
Ulna
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Olecranon Process
Coronoid Process
Semilunar Notch
Radial Notch
Ulnar Tuberosity
Supinator Crest
Supinator Fossa
Interosseous Crest
Head
Styloid Process
Lateral View – proximal ulna
Elbow Joint
Humeroulnar Joint (ginglymus)
Radioulnar Joint (trochoidial) prox & dist
 Ulnar collateral ligament
 Annular ligament
_______________________________
______________________________
Radiohumeral Joint (arthrodial)
 Radial collateral ligament
_______________________________
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Interosseous membrane
______________________________
Movements & Range of Motion
Humeroulnar joint
Radioulnar Joint
Flexion: 150°
Supination: 90° from neutral position
Extension (hyperextension): 10°
Pronation: 90° from neutral position
Movements of the Elbow & Radioulnar Joints
Flexion - movement of the forearm to the shoulder by
bending the elbow to decrease its angle
Extension - movement of the forearm away from the
shoulder by straightening the elbow to increase its angle
Supination - external rotary movement of the radius
on the ulna that results in the hand moving from the
palm-down to the palm-up position
Pronation - internal rotary movement of the radius on
the ulna that results in the hand moving from the palmup to the palm-down position
Myotome & Cutaneous Distribution of Axillary & Musculocutaneous Nerves
Elbow Deviations
a. Normal Cubitus: 0° - 15° (Carrying Angle) Anatomical position
b. Cubitus Varus: Forearm ________________ deviation
c. Cubitus Valgus: Forearm ________________ deviation
d. Cubitus Recurvatum: Forearm ________________ deviation
Muscles of the Elbow & Radioulnar Joint
Biceps Brachii
O. Long Head: Supraglenoid tubercle Short Head: Coracoid process
I. Radial tuberosity & bicipital aponeurosis
A. _________________________________________________________
_________________________________________________________
N. Musculocutaneous
Brachialis
O. Distal half of anterior shaft of humerus
I. Coronoid process
A. _________________________________________________________
_________________________________________________________
N. Musculocutaneous
Brachioradialis
O. Lateral supercondylar ridge of humerus
I. Styloid process of radius
A. _________________________________________________________
_________________________________________________________
N. Radial
Triceps Brachii
O. Long Head: Infraglenoid tubercle of humerus
Lateral Head: Upper half of posterolateral surface of humerus
Medial Head: Lower half of posterior surface of humerus
I. Olecranon process of ulna
A. _________________________________________________________
_________________________________________________________
N. Radial
Anconeus
O. Posterior surface of lateral condyle of humerus
I. Posterolateral surface of olecranon process and upper posterior ulna
A. _________________________________________________________
_________________________________________________________
N. Radial
Pronator Teres
O. Medial supracondylar ridge of humerus & medial side proximal ulna
I. Middle third of lateral surface of radius
A. _________________________________________________________
_________________________________________________________
N. Median
Pronator Quadratus
O. Distal fourth of anterior surface of ulna
I. Distal fourth of anterior surface of radius
A. _________________________________________________________
_________________________________________________________
N. Median
Supinator
O. Lateral epicondyle of humerus & supinator crest on posterolateral ulna
I. Lateral surface of proximal radius just below radial head
A. _________________________________________________________
_________________________________________________________
N. Radial
Medial Epicondylitis:
 MOI:
 Test:
 Rx:
Injuries to the Elbow
Lateral Epicondylitis
 MOI:
 Test:
 Rx
Subluxation & Dislocation of the Radial
Head (Pulled Elbow)
 MOI:
 Position:
 Rx:
Subcutaneous Olecranon Bursitis
 MOI:
 Rx: