Wrist Comp Flashcards
Small chip fractures may occur near where?
Joint spaces
Which carpals articulate with which metacarpals?
Trapezium: 1
Trapezoid: 2
Capitate: 3
Hamate: 4 and 5
Largest proximal carpal?
Scaphoid (navicular)
What does the scaphoid articulate with proximally?
The radius
Most frequently fracture carpal bone?
Scaphoid
What carpals does the radius articulate with?
Scaphoid and lunate
What is the deep concavity on the distal surface of the lunate for?
Where is articulates with the capitate
Pyramidal shaped carpal?
Triquetrum
What does the triquetrum articulate with anteriorly?
The pisiform
Where is the pisiform in relation to the triquetrum?
Anterior
In what view is the pisiform most evident?
The carpal sulcus view
Where is the trapezium in relation to the scaphoid??
Medial and distal
Wedge shaped carpal?
Trapezoid
Smallest distal carpal?
Trapezoid
Hook like process of the hamate? Where does it project from?
Hamulus projects from the palmar surface
What passes through the carpal sulcus (carpal tunnel)?
Major nerves and tendons
Carpal sulcus view best demonstrates what?
Pisiform and hamulus
Trapezium and its relationship to the thumb
Which styloid process extends more distally?
Radial styloid process
Head of the ulna fits into the ______ of the radius?
Ulnar notch
Ulnar head and styloid process are easily felt when hand is ______?
Pronated
All joints of the upper limb are classified as?
Synovial, diarthrodial (freely movable)
1 CMC joint type and movement
- Sellar/saddle
- flexion/extension, abduction/adduction, circumduction, opposition, and rotation
2-5 CMC joint type and movement
- plane/gliding
- flat or slightly curved, movement limited by tight fibrous capsule
- least movable
Least movable joints?
2-5 CMC joints
Intercarpal joint type and movement
-plane/gliding
Wrist joint type and movement
-ellipsoidal/condyloid (most freely movable)
What is the articulation between the radius, scaphoid, and lunate called?
Radiocarpal joint
What is part of the total wrist articulation including the distal radioulnar joint?
Articular disc
What is opposite the articular disc?
Triquetrum
What is the wrist joint? (Formed by)
Distal radius and articular disc form a concave shape that articulates with the scaphoid, lunate, and triquetrum
Movement of wrist joint?
4 directions plus circumduction
What do the wrist ligaments do?
Stabilize the wrist joint
Wrist ligaments?
-Ulnar collateral ligament
-Radial collateral ligament
-5 additional
(Dorsal radiocarpal, palmar radiocarpal, triangular fibrocartilage complex TFCC, scapholunate, lunotriquetral)
Ulnar deviation best demonstrates?
Scaphoid
Trapezium
Trapezoid
Radial deviation best demonstrates?
Pisiform
Triquetrum
Lunate
Hamate
Extrasynovial?
Outside the synovial sac, but within the joint capsule
Fat strips?
- Scaphoid fat stripe
- Pronator fat stripe
Scaphoid fat stripe best demonstrated on what views?
PA and oblique
Pronator fat stripe best demonstrated on what views?
Lateral
Where is the scaphoid fat stripe located?
Between the radial collateral ligament and adjoining muscle tendons lateral to scaphoid
Where is the pronator fat stripe located?
1cm anterior to radius
If seen, what do fat stripes demonstrate?
Fractures, pathologies
Barton’s fracture?
Fracture and dislocation of the posterior lip of the distal radius
Bennett’s fracture?
Fracture of the base of the 1st metacarpal, subluxation and posterior displacement
Colle’s fracture
Fracture of the distal radius with posterior displacement of the distal fragment FOOSH
Smith’s fracture?
Fracture of the distal radius with anterior displacement of the distal fragment
Bursitis?
Inflammation of the bursa
Carpal tunnel syndrome?
Compression of the medial nerve as it passes through the center of the wrist
Skier’s thumb?
Sprain or tear of the ulnar collateral ligament of thumb
PA stress views of bilateral thumb
Folio
