wrist & hand Flashcards
2nd carpal bone to ossify?
HAMATE
ossification of carpal bones?
starts at CAPITATE, then COUNTERCLOCKWISE
last carpal bone to ossify?
PISIFORM
of phalanges per hand?
14 (3 per finger except thumb with 2)
what kind of joint is the wrist (radius - scaphoid,lunate,triquetrum)?
ELLIPSOID joint
STRONGEST SUPPORT of radiocarpal joint?
palmar/volar RADIOCARPAL LIGAMENT (radiocapitate, radiotriquetral, radioscapholunate components)
STRONGER between dorsal and volar intercarpal ligaments?
DORSAL intercarpal ligaments
THUMB CARPOMETACARPAL joint kind?
saddle joint
CARPOMETACARPAL joint kind?
gliding joint
METACARPOPHALANGEAL joint kind?
ellipsoid joint
INTERPHALANGEAL joint kind?
hinge joint
contents of FIRST dorsal compartment?
APL *multiple tendon slips, EPB
contents of SECOND dorsal compartment?
ECRB, ECRL
borders of anatomic snuffbox?
EPB (1st compartment) - radial border, EPL (3rd compartment) - ulnar border
contents of carpal tunnel?
10 = 9 tendons [FPL (1), FDS (4), FDP (4)] + median nerve
of annular pulleys per finger?
5 (A1-A5), A2 & A4 originate from bone
annular pulley most critical to function?
A2 (over proximal phalanx), followed by A4 (middle phalanx)
annular pulley invoved in trigger finger?
A1
branches of median nerve?
palmar cutaneous (thenar skin), deep branch (thenar muscles), digital nerves (lumbricals, volar aspect radial 3.5 digits)
nerves supplying sensation to thumb?
5 branches (from median, radial nerve)
communication of radial and ulnar arteries?
superficial and deep (palmar) arches
forms DEEP PALMAR arch?
RADIAL artery
forms SUPERFICIAL PALMAR arch?
ULNAR artery
where incision for carpal tunnel release is done?
in line with 4th ray (to avoid palmar cutaneous branch of median nerve)