Distal ulna and radius Flashcards
Distal ulna
Bone tapers from top (smaller at base)
Head at distal site
Ulnar styloid process
Ulna styloid process function
Collateral wrist ligaments attach
Distal radius
Bone larger at distal end
Ariculates with carpals
Lateral radius
Styloid process - collateral ligaments attach
Medial radius
Ulna notch for ulna head to articulate
Posterior distal radius
Dorsal tubercle - allow extensor pollucis longus to change directions of pull
Carpal bone organisation
2 rows of 4
Proximal - articulate with radius
Distal - articulate with metacarpals
metacarpal parts
head
body
base
hand bones
carpals (base)
metacarpals
phalanges (3 per finger apart from thumb)
Joints of the hand
metacarphalangeal interphalangeal (distal and proximal)
Proximal carpal bones
Scaphoid
Lunate
Triquetrum
Pisiform
Straight line to pinky
Distal carpal bones
Hamate
Capitate
Trapezoid
Trapezium
Here comes the thumb
carpal tunnel borders
roof: flexor retinaculum
Lateral: scaphoid and trapezium
Medial: Hamate and pisiform
Contents of carpal tunnel
flexor tendons - flexor digitorum superficialis and profundus (superficialis on top) flexor pollucis longus Median nerve (most superficial)
(NOT ULNAR NERVE)
Rhyme for carpals
Triquetral = proxiMAL Trapezium = under the thumb