Osteocology on Wrist | Lecture Note

University:
The University Of Western Ontario
Course:
ANAT 2200B | Systemic Anatomy of the Human Body
Academic year:

2022
Views:

409

Pages:

3
Author:

Kyuwon J.

Osteology ● Carpal bones in two rows ○ Proximal rows ■ Lateral⇒medial ● Scaphoid, lunate ,triquetrum, pisiform ■ Carpal arch concepts ● Carpal bones ● Anteriorly directed arch ○ Carpal tunnel basis ● Carpal arch pillars ○ Medial pillar ■ pisiform + hook of hamate ○ Lateral pillar ■ Tubercles scaphoids ■ Trapezium Wrist regions ● Radio carpal joints ○ Wrist ○ Synovial joints ○ Distal radius + articular disc over ulna + scaphoid + lunate triquetrum ○ Proximal surface of scaphoid and lunate tends to be the major radius facing partnerscap ○ movements ■ flexions ■ extension ■ radial deviation (abduction) ■ ulnar deviation(adduction) ○ since radial styloid extends more distally compared to ulnar sylodis, hands are able to adduct more then abduction ● Intercarpal + midcarpal joints ○ common articular cavity ○ stabilized by multiple ligaments ■ binding carpal bones ● scapholunate ligaments ● lunotriquetral ligaments ■ Volar extrinsic ligaments ● radioscapho-capitate ● Long radiolunate ● Short radiolunate ■ Ulnocarpal ligaments - support on ulnar side ● ulnolunate ● ulnotriquetral ● Ulnocapitate ■ Dorsal ligaments - dorsal stability pattern ● Dorsal transverse intercarpal ligament ○ scaphoid⇒triquetrum ● Dorsal radiocarpal ligament ○ radius ⇒ triquetrum ○ each joints' motion are limited ■ still will contribute to abduction/addiction ■ flexion ■ extension(major contribution) ● Distal radioulnar joints + TFCC ○ DRUJ are not perfect congruent ■ permits translation while rotation of pronation or supination ○ TFCC ■ stabilize DRUJ ■ absorb force from carpus to ulnar part ○ ulnotriquetral + ulnounate ligament ○ volar+dorsal radioulnar ligaments ○ ulnar collateral ligaments ○ ECU subsheath ○ Meniscus homologs Major ligaments ● Radiocarpal capsules ○ palmar radiocarpal ○ palmar ulnocarpal ○ Dorsal radiocarpal ligaments