Elbow

Question 1

ELBOW JOINT

Answer 1

• Bones & joint surfaces:

– Humerus: • Trochlea

• Capitulum

– Ulna

Trochlear notch

Radial notch

– Radius • Head

Question 2

joints and classifications

Answer 2

• Classification: – Synovial hinge
• Humeroulnarjoint – Synovial hinge
• Humeroradialjoint – Ball and socket
• Proximalradioulnar joint

– Synovial pivot

Question 3

synovial membrane and fat pads

Answer 3

• Synovialmembrane • Fat pads

Question 4

capsule ligaments

Answer 4

Question 5

cubital fossa

Answer 5

• Margins

– Medial
• Pronator teres

– Lateral
• Brachioradialis

– Base

• line between epicondyles

• Floor
– Brachialis

• Roof

– Superficialfascia& skin

Question 6

cubital fossa contents

Answer 6

Contents

– Tendonofbiceps brachii & bicipital aponeurosis

– Brachialartery

– Mediannerve

– Radialnerve

Question 7

pronator teres

Answer 7

• Origin

– Humeral head – medial epicondyle & supracondylar ridge

– Ulnar head – medial coronoid process

• Insertion

– Lateral midshaft of radius

• Innervation
– Median nerve

• Action
– Pronation

Question 8

anconeus

Answer 8

• Origin

– Lateral epicondyle of humerus

• Insertion

– Olecranon & postero-superior ulna

• Innervation
– Radial nerve

• Action

– Abduct ulna in pronation

– Elbow extension synergist

Question 9

brachioradialis

Answer 9

• Origin

– Lateral supracondylar ridge of humerus & intermuscular septum

• Insertion
– Distolateral radius

• Innervation
– Radial nerve

• Action

– Elbow flexion synergist in midpronation

– Pronate supinated forearm

– Supinate pronated forearm

Question 10

supinator

Answer 10

• Origin

– Superficial

Lateral epicondyle of humerus

radial collateral ligament

annular ligament

– Deep

• supinator crest of ulna
• Insertion

– Radius superolateral to oblique line

• Innervation

– Posterior interosseous nerve (from deep branch of Radial nerve)

• Action
– Supination

– Radius superolateral to oblique line