Radioulnar joints Flashcards Preview

MSK > Radioulnar joints > Flashcards

Flashcards in Radioulnar joints Deck (16):
1

What movements do the radioulnar joints facilitate

Pronation and supination
Head of radius pivots on capitulum of humerus

2

Articulation of proximal RUJ

Head of radius and radial notch of ulna

3

Articulation of distal RUJ

Ulnar notch of radius and ulnar head

4

What holds the radial head in place

Annular radial ligament - forms a collar around the proximal RUJ

5

What is pulled elbow

Head of radius sublaxates from the annular radial ligament

6

Where is the interosseous membrane

Spans between the medial radial border and the lateral ulnar border

7

Functions of the interosseous membrane

Holds radius and ulna together during pronation/supination,
Site of attachment for muscles,
Transfers forces from radius to ulna

8

What strengthens the distal RUJ

Anterior ligament,
Posterior ligament,
Articular disk (mainly)

9

Functions of distal RUJ

Binds radius and ulna together,
Separates the distal RUJ from the wrist,
Allows pronation/supination - ulnar notch slides anteriorly over ulnar head

10

What's the sacciform recess

Superior extension of synovial capsule that allows twisting of capsule during pronation/supination

11

What are the radioulnar joints

Proximal radioulnar,
Interosseous membrane,
Distal radioulnar

12

What encloses the PRUJ

Articular capsule of elbow joint

13

What is the annular radial ligament lined with

Synovial membrane to reduce friction

14

What's the difference between subluxation and dislocation

Sublaxation - bones misaligned but still in contact
Dislocation - complete loss of contact of articulating surfaces

15

What are the small holes for in the interosseus membrane

Passage of forearm vasculature

16

What direction do the fibres run in the interosseus membrane (I.e. What's the direction of force transmission)

Infero-medial direction

Decks in MSK Class (87):