elbow joint : radioulnar/humeroulnar

Question 1

anular ligament

Answer 1

encircles and holds the head of the radius in the radial notch of the ulna forming the proximal radio-ulnar joint and permitting pronations and supination of the forearm

Question 2

trochlear notch

Answer 2

large depression formed by the olecranon and the coronoid process, articulates with trochlea of humerus

Question 3

radial collateral ligament

Answer 3

• around radius and capitulum
• thickening of capsule on the outside (lateral)
• blends distally with the annular ligament of the radius

Question 4

ulna collateral ligament

Answer 4

• medial, triangular
• extends from the medial epicondyle of the humerus to the coronoid process and olecranon of the ulna.
• anterior band ; very strong
• posterior fan-like band : weakest
• slender oblique band deepens the socket for the trochlea of the humerus

Question 5

bursae

Answer 5

• cinovial membrane, sac filled with liquid to help with reducing friction
• intratendinous olecranon bursa : sometimes present in the tendon of the triceps brachii
• subtendinous olecranon bursa: between the olecranon and the triceps tendon

-subcutaneous olecranon bursa : located in the subcutaneous connective tissue over the olecranon

see lecture 14 pic

Question 6

cubital fossa

Answer 6

TAN : tendon, artery, nerve (lateral to medial)

biceps brachii tendon, brachial artery and veins, median nerve

see lecture 14 picture

Question 7

arteries of distal upper limb

Answer 7

brachial artery crosses through cubital fossa then splits into :

• ulnar artery : then continues to superficial palmar arch USPA
• radial artery : then continues to the deep palmar arch RDPA

both are eventually connected