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60 Cards in this Set

  • Front
  • Back
what bone commonly breaks due to a fall on an outstretched hand?
scaphoid bone (aka navicular bone) of wrist
how many bones make up the wrist?
8 carpal bones
which carpal bone is near the base of the thumb?
scaphoid bone
what two bones do the carpal bones connect to the hand?
the radius and ulna
what are the metacarpal bones?
long bones that lie underneath the palm
what bones do the metacarpals attach to
phalanges
is there a lot of blood flow to the wrist?
NO!
why is the scaphoid bone the most commonly fractured carpal bone?
it actually crosses two rows of carpal bones, forming a hinge. a fall on the outstretched hand puts heavy stress on the scaphoid bone. the stress can cause a small crack through themiddle of the bone or a complete separation of the bone into two pieces.
what is a separation called?
displaced fracture
what bones does the radius articulate with?
scaphoid and lunate bones
where is the ulnar styloid located?
anterior portion of distal ulna
name the 8 carpal bones
scaphoid
lunate
triquetrum
hamate
capitate
trapezoid
trapezium
pisiform
which bones are located in the proximal row
scaphoid
lunate
triquetrum
pisiform
which bones are located in the distal row?
trapezium
trapezoid
capitate
hamate
what bone does the scaphoid articulate with?
radius
what carpal bone is the most frequently dislocated bone?
lunate
which carpal bone occupies most of the ulnar side of the wrist?
triquetrum
which carpal articulates with 4th and 5th digits?
hamate
which bone is the attachment site for the transverse carpal ligament?
hamate
which is the largest carpal bone?
capitate
which carpal has a deep concavity?
capitate
where do all wrist rotation movements axis on?
capitate
which carpal primarily articulates with 3rd metacarpal?
capitate
what is the small wedged carpal between the capitate and trapezium?
trapezoid
which carpal articulates with 2nd metacarpal?
trapezoid
which carpal is multiangular?
trapezium
which carpal articlulates with 1st metacarpal?
trapezium
which carpal facilitates much thumb movement?
trapezium
which carpal has little functional significance?
pisiform
list the wrist bones
Scaphoid (some)
Lunate (lovers
Triquetrum (try
Pisiform (positions
Trapezium (that
Trapezoid (they
Capitate (can't
Hamate (handle
name the joints of the wrist
radiocarpal joint
midcarpal joint
how many degrees of freedom does the readiocarpal joint have?
2
what deviation occurs at the radiocarpal joint?
ulnar and radial deviation (through capitate bone)
midcarpal joint
junction between distal and proximal rows of carpal bones
-ligaments are prime source for stability
what is the triangular fibrocartilage comples often referred to as?
meniscus of the wrist
where do extrinsic ligaments have attachments to?
radius, ulna or triangular fibrocartilage complex
what are the extrinsic ligaments?
dorsal radiocarpal ligament
radial collateral ligament
palmar radiocarpal lig
ulnocarpal complex
what do the extrinsic ligaments do?
provide support to the distal radioulnar joint. plays limiting normal pronation and supination (controversial)
what do the short intrinsic ligaments do?
connect the bones of the distal row by their palmar, dorsal or interossesous surfaces. stabilize and unite the row
what do the intermediate intrinsic ligaments do?
exist within the wrist
how many long ligaments are in the wrist?
2
palmar intercarpal ligament
dorsal intercarpal ligament
where does the palmar intercarpal ligament attach to?
firmly attached to the capitate bone
what does the dorsal intercarpal ligament do?
binds scaphoid to the triquetrum
provides transverse stability to the wrist
what are the wrist motions?
flexion
extension
radial deviation
ulnar deviation
what is ROM for wrist flexion?
0-80
what is ROM for wrist extension
0-70
what is ROM for RADIAL DEVIATION
0-20
what is ROM for ulnar deviation
0-30
what are the primary wrist extensors
extensor carpi radialis longus/brevis
extensor carpi ulnaris
what are the secondary wrist extensors
extensor digitorum communis
extensor indicis
extensor digiti minimi
extensor pollicis longus
what are the primary wrist flexors
flexor carpi radials
flexor carpi ulnaris
palmaris longus
what are the secondary wrist flexors
flexor digitorum profundus
flexor digitorum superficials
flexor pollicis longus
radial deviators
Extensor carpi radialis longus
Extensor carpi radialis brevis
Extensor pollicis longus
Extensor pollicis brevis
Flexor carpi radialis
Abductor pollicis longus
Flexor pollicis longus
ulnar deviators
extensor carpi ulnaris
flexor carpi ulnaris
what is colles fracture
fracture of distal end of radius
what bone do most wrist fractures involve?
scaphoid bone
what is kienbock's disease
condition in which one of the small bones of the wrist loses its blood supply and dies, causing pain and stiffness with wrist motion
triangular fibrocartilage complex injury
ulnar abutment and/or degenerative lesions of the TFCC, ulnar impaction syndrome (chondromalacia of the ulnar head and lunate, lunotriquetral instability)
carpal tunnel sundrome
collection of characteristic symptoms and signs that occurs following entrapment of the median nerve within the carpal tunnel
scapholunate collapse (SLAC)
Scapholunate advanced collapse (SLAC) of the wrist is the most common pattern of degenerative arthritis in the wrist. Watson and Ballet coined the term SLAC wrist in 1984.
Findings of bilateral SLAC wrist on a prehistoric skeleton from Hassi-el-Abiod site in Malian Sahara provide paleopathological evidence of the existence of this disease 7000 years ago.