Lec. 3: Kin of the Wrist Flashcards
jts of wrist (2)
midcarpal and radiocarpal
CPP, Cap. pattern, and typical dislocation of radiocarpal jt
CPP: full EXT w/ Rad Dev
Cap. pattern: FLEX=EXT
Typical dislocation: lunate moves ANT into carpal tunnel; most carpals move POST
CPP, Cap. pattern, and typical dislocation of midcarpal jt
CPP: EXT w/ Rad Dev
Cap. pattern: FLEX = EXT
Typical dislocation: most carpals dislocated POST
ligs of the radiocarpal jt are ______, whereas the ligs of the midcarpal jt are ______ and therefore do not _____ as fast because of less _______
extrinsic, intrinsic (intracapsular), heal, vascularity
ligs from the radiocarpal jt _____ several _____ and therefore support the _____ jt
cross, carpals, midcarpal
motion occurs ______ at the radio- and mid- carpal jts
simultaneously
the PROX row of carpals serves as a _______ ___ b/w the ____ carpals and ____ ______ b/c no mms specifically insert on the PROX row of carpals
mechanical link, DIST, DIST radius
in Rad and Uln Dev the DIST row first moves toward the side of _____ and the PROX row is pulled towards the ______ side by tightening _____
Dev, opposite, ligs
why is FCU a more effective Uln Dev than FCR is at Rad Dev
b/c FCUs tendon passes further away from the anteroposterior axis from which deviation occurs
secondary wrist flexor mm
palmaris longus
FLEX at the wrist by FDP and FDS requires ______ activity from finger ______ to prevent full FLEX at the digits which would result in _____ _______
synergistic, extensors, active insufficiency
ECRL shows increased activity with ___ ___ and support against ___ ____. ECRB is more active during pure ___.
Rad Dev, Uln Dev, EXT
ECU has a secondary role of support of the wrist during ____
FLEX
-wrist EXT is secondary action
-synergist to both flexor digitorums and requires synergistic activity of these mms during wrist EXT to prevent simultaneous digit EXT
ED
