Structure of elbow joint

Question 1

Type of joint

Answer 1

Compound synovial joint

Question 2

Articulating bones

Answer 2

Humerus
Radius
Ulna

Question 3

Humero-radial articulation

Answer 3

Between head of radius and capitulum

Question 4

Humero-ulnar articulation

Answer 4

Between trochlear and trochlear notch of ulna

Question 5

Joint capsule

Answer 5

Fibrous membrane covering synovial membrane to enclose the joint

Question 6

Attachments of joint capsule

Answer 6

Margins of epicondyles
Neck of radius
Olecranon
Coronoid process of ulna

Question 7

Radial collateral ligament

Answer 7

Proximally attaches to lateral epicondyle

Distally attaches to annular ligament

Question 8

Ulnar collateral ligament

Answer 8

Proximally attaches to medial epicondyle

Distally attaches to medial aspect of olecranon

Question 9

Annular ligament

Answer 9

Encircles head of radius and hugs it to radial notch of ulna.

Question 10

Quadrate ligament

Answer 10

Limits spin of radial head

Limits supination and pronation

Question 11

Interosseous membrane

Answer 11

Between radius and ulna
Transmits force from the hand
Area for muscle attachment

Question 12

Arterial supply

Answer 12

From cubital anastomosis

Branches from brachial and deep brachial arteries

Question 13

Nerve supply

Answer 13

Median, musculocutaneous and radial anteriorly

Ulnar posteriorly.

Question 14

Bursae

Answer 14

Intratendinous bursa- located in tendon of biceps brachii
Subtendinous bursa- between olecranon and tendon of triceps brachii
Subcutaneous bursa- between olecranon and overlying connective tissue