arthrology of the elbow and forearm

Question 1

classify the elbow joint

Answer 1

snyovial, compound, hinge, uni-axial

Question 2

classify the superior radio-ulnar joint

Answer 2

synovial, pivot, simple, uni-axial

Question 3

classify the inferior radio-ulnar joint

Answer 3

synovial, simple, pivot, uni-axial

Question 4

describe the arrangement of the ulnar collateral ligament

Answer 4

arranged into 3 parts- anterior, posterior, intermediate
anterior fibres run from medial epicondyle of humerus to the medial coronoid process
posterior fibres run from medial epicondyle of humerus to the medial olecranon process

Question 5

function of the ulnar collateral ligament

Answer 5

limits valgus force of the elbow and limits flexion (anterior bands) and extension (posterior bands)

Question 6

describe the annular ligament

Answer 6

4/5ths of a circle
attaches from the anterior and posterior margins of the radial notch of ulna
made of strong, flexible fibrocartilage

Question 7

functions of annular ligament

Answer 7

prevents separation of the radius and ulna

Question 8

what are the 5 functions of the interosseous membrane

Answer 8

-resists separation of the radius and ulna
-increase surface area for muscle attachment
-separates the forearm into anterior and posterior compartments
-weight transmission between radius and ulna during upper limb activity
- resist inferior displacement of the radius at the superior R/U joint

Question 9

what is the triangular fibrocartilaginous complex (TFCC)

Answer 9

load- bearing triangular fibrocartilaginous disc
stabiliser of the inferior RU joint and ulnar aspect of the wrist

Question 10

where is the TFCC located

Answer 10

between the distal ulna and lunate and triquetrum

Question 11

what symptoms might a patient with an injury to the TFCC experience

Answer 11

pain on ulnar aspect of wrist
clicking on movement
inability to load weight

Question 12

what are the limiting factors of flexion at the elbow

Answer 12

extent of articular surfaces
posterior fibres of collateral ligaments
extensor muscles (triceps)

Question 13

what are the limiting factors of extension of elbow

Answer 13

extent of articular surfaces
anterior fibres of collateral ligaments
flexor muscles- brachialis and biceps

Question 14

limiting factors of pronation

Answer 14

quadrate ligament
pronator muscles (supinatior and biceps)

Question 15

limiting factors of supination

Answer 15

quadrate ligament
pronator muscles (teres and quadratus)

Question 16

limiting factor of varus movement

Answer 16

radial collateral ligament

Question 17

limiting factor of valgus movement

Answer 17

ulna collateral ligament