arthrology of the wrist Flashcards
classify the radiocarpal joint
synovial, complex, ellipsoid, bi-axial
what bones articulate at the radiocarpal joint
distal end of radius and proximal row of carpal bones except for pisiform (scaphoid, lunate, triquetral).
also articulates with intra-articulating disc
describe the concave convex rule in terms of the radiocarpal joint
surface of radius and intra-articular disc forms a concave surface
row of carpal bones forms convex surface
attachments of the radial collateral ligament
passes from the tip of the radial styloid to the scaphoid
attachments of the ulnar collateral ligament
from ulnar styloid process to pisiform and triquetral
attachments of dorsal and palmar radiocarpal ligaments
anterior and posterior
from radius to scaphoid, lunate and triquetral
normal ROM wrist flexion
0-90 degrees
limiting factors of wrist flexion
dorsal radiocarpal ligament
tension in extensor tendons
limiting factors wrist extension
palmar radiocarpal ligament
ulnocarpal ligament
tension in flexor tendons
normal ROM wrist adduction/ ulnar deviation
0-40 degrees
limiting factors wrist adduction/ ulnar deviation
radial collateral ligament
normal ROM wrist abduction/ radial deviation
0-15 degrees
limiting factors wrist abduction/ radial deviation
ulnar collateral ligament
apposition of scaphoid tubercle on radial styloid
attachments of the flexor retinaculum
anterior aspect of hand
attaches medially to pisiform and hook of hamate, and laterally to scaphoid tubercle and trapezium
attachments of extensor retinaculum
attaches laterally to anterior border of radius and medially to styloid process on ulna, the triquetral and pisiform
