Elbow/ humeroulnar joint

Question 1

Name/ classification

Answer 1

Synovial hinge joint

Question 2

Movements produced at joint

Answer 2

Flexion/ extension

Question 3

Degrees of freedom/ planes of movement

Answer 3

1 degree of freedom in sagittal plane

Question 4

Bones and articulating surfaces

Answer 4

Trochlea notch of ulna
Trochlea of humerus

Head of radius articulates with distal humerus= humeroradial joint
Trochlea notch (ulna) articulates with trochlea (humerus)= humeroulnar joint

Question 5

Cartilage

Answer 5

Hyaline cartilage at articulating surfaces reduces friction and absorbs shock

Question 6

Joint capsule

Answer 6

Capsule is strong and fibrous, enclosing joint and strengthening it
Capsule is thickened medially and laterally to form (radial and ulna) collateral ligaments, which stabilise motion of arm
Includes superior radioulnar joint

Question 7

Synovial membrane

Answer 7

Lines the capsule and secretes synovial fluid which nourishes cartilage, removes waste and reduces friction

Question 8

Ligaments

Answer 8

Radial collateral ligament
Ulna collateral ligaments

Question 9

Blood supply

Answer 9

Branches of brachial and deep brachial arteries

Question 10

Nerve supply

Answer 10

Anterior:
Median nerve
Musculocutaneous nerve
Radial nerve

Posterior:
Ulnar nerve

Question 11

Muscles

Answer 11

Flexion:
Brachialis
Brachioradialis
Bicep brachii

Extension:
Triceps brachii