Proximal Radio-Ulnar Joint

Question 1

What type is the proximal radioulnar joint

Answer 1

Synovial/ pivot

Question 2

The radial head is held in position in the radial notch

Answer 2

Annular ligament

Question 3

The synovial membrane of the joint capsule of the proximal radio-ulnar joint is a prolongation Of

Answer 3

The synovial membrane of the elbow joint

Question 4

The deep surface of the annular ligament is lined with synovial membrane that continues distally as

Answer 4

Sacciform recess of the radio ulnar joint on the neck of the radius

Question 5

Supination is produced at the proximal radio-ulnar joint by

Answer 5

Supinator (when there is no resistance)
Biceps brachii ( when there is resistance)
Some assistance from Extensor policis Longus and Extensor Carpi radialis longus

Question 6

Pronation is produced at proximal radio-ulnar joint by

Answer 6

Pronator Quadratus(primarily)
Pronator Teres(secondarily)
Some assistance for the Flexor Carpi Ulnaris, Palmaris Longus and Brachoradialis(when the forearm is midpronated)

Question 7

Blood supply to the proximal radioulnar joint

Answer 7

Radial portion of the peri-articular arterial anastomoses of the elbow joint ( radial and middle collateral arteries anastomosing with the radial and recurrent interosseous arteries)

Question 8

Innervation of the Proximal radio-ulna joint

Answer 8

Musculocutaneous, medial and radial nerves

Question 9

Pronation is essentially a function of what nerve

Answer 9

Median nerve

Question 10

Supination is a function of what nerve

Answer 10

Musculocutaneous and Radial nerves