Week 8: Wrist and Hand Flashcards
How many bones are there in the wrist and hand?
29
Name the carpal bones
scaphoid, lunate, triquetrum, pisiform, trapezium, trapezoid, capitate, hamate
What is radial deviation?
hand deviates towards radius (abduction)
What is ulnar deviation?
hand deviates towards ulna (adduction)
What is finger abduction?
moving digits away from digit 3
What is finger adduction?
moving digits towards digit 3
What are the different wrist joints?
radiocarpal joint, midcarpal joint, intercarpal joints, carpometacarpal joints
What is the classification of the radiocarpal joint?
synovial, bi-axial, ellipsoid
What is the classification of the midcarpal joints?
synovial, bi-axial, ellipsoid
What is the classification of the intercarpal joints?
synovial, multi-axial, planar
What is the classification of the common carpometacarpal (CMC) joints?
synovial, multi-axial, planar
What is the classification of the first CMC joint?
synovial, bi-axial, saddle
What movements occur at the radiocarpal joint?
flexion/extension, radial deviation/ulnar deviation
What is the triangular fibrocartilage complex?
the articular disc at ulna head, palmar radioulnar ligament, dorsal radioulnar ligament
What are the different radiocarpal ligaments?
radial collateral ligament (RCL), ulna collateral ligament (UCL), palmar radiocarpal ligament (PRCL) Palmar ulna carpal ligament (PUCL) and dorsal radiocarpal ligament (DRCL)
What are the attachments of the RCL?
radial styloid to scaphoid/trapezium
What are the attachments of the UCL?
ulnar styloid to triquetrum/pisiform
What are the attachments of the PRCL?
anterior radius to scaphoid/lunate/triquetrum
What are the attachments of the PUCL?
anterior ulna to scaphoid/lunate/triquetrum
What are the attachments of the DRCL?
posterior radius to scaphoid/lunate/triquetrum
What are the ligaments of the 1st CMC joint?
radial CMC/collateral ligament, anterior oblique ligament, posterior oblique ligament
What are the attachments of the radial CMC/collateral ligament?
trapezium and 1st metacarpal
What are the attachment of the anterior oblique ligament?
anterior trapezium to medial 1st metacarpal
What are the attachment of the posterior oblique ligament?
posterior trapezium to medial 1st metacarpal
What are he movements that occur at the 1st CMC joint?
flexion/extension, abduction/adduction, opposition (combination)
What are the joints of the hand?
metacarpophalangeal (MCP) joints and interphalangeal (IP) joints
What is the classification of the MCP joints?
synovial, bi-axial, condyloid
What is the classification of the IP joints?
synovial, uni-axial, hinge
What movements occur at the 1st MCP joint?
flexion (45 deg.) and abduction (15 deg.)
What movements occur at 2-5 MCP joints?
flexion (90 deg.) / extension (50 deg.), abduction/adduction (40 deg.)
What are the ligaments reinforcing the MCP joints?
collateral ligaments, palmar ligament, deep transverse metacarpal ligament
Which ligaments reinforce the 1st MCP joint?
RCL and UCL