Flashcards in MSK - Arm And Forearm Anatomy Deck (12)
What is the membrane called between the radius and ulna?
What are the three joints of the elbow?
1) ulnohumeral (hinge joint)
2) radiohumeral (ball and socket)
3) upper radioulnar joint (trochoid)
Is the elbow joint a synovial hinge joint?
What is the difference between cubitus varus and cubitus valgus?
Cubitus varus is when the arm is held inwards at an angle from the elbow. This is a cosmetic problem only. Cubitus valgus is when the arm is held outwards at the elbow. This is a functional problem as it stretches the ulnar nerve and may prevent movement of the hand
How is the elbow joint stabilised?
It has a capsule, ligaments and muscles to stabilise it
What are the three ligaments found at the elbow?
- medial collateral ligament (posterior, anterior and transverse parts)
- lateral collateral ligament (with radial and ulnar parts)
- annular ligament
What is the 'fat pad sign'?
This is when the fat pad (usually pressed against the olecranon fossa by the triceps tendon) is moved out of place due to inflammation and therefore visible on an X-ray. It suggests a fracture of the humerus or the radial head
Which movement is the upper radioulnar joint involved with?
Pronation and supination
Which movement is the ulnohumeral joint mainly involved with?
Flexion and extension
What are the three main nerve supplies to the forearm?
Median nerve, ulnar nerve, radial nerve
What is compartment syndrome?
Increased pressure within a muscle compartment of the arm of leg. Usually due to injury such as a fracture. Treatment is fasciotomy