Cov pivot sib koom yog lwm qhov hom synovial uniaxial sib koom. Ib qho pivot sib koom tso cai tsuas yog kev sib hloov (pivot) motions nyob rau hauv lub transverse dav hlau nyob ib ncig ntawm ib tug ntsug axis.
Yuav ua li cas sib koom ua ke yog biaxial?
Ib qho piv txwv ntawm kev sib koom ua ke biaxial yog a metacarpophalangeal sib koom (knuckle joint) ntawmtes. Kev sib koom ua ke tso cai rau kev txav mus los ntawm ib qho axis los tsim khoov lossis ncaj ntawm tus ntiv tes, thiab txav mus raws ob lub axis, uas tso cai rau kev sib kis ntawm cov ntiv tes tawm ntawm ib leeg thiab coj lawv los ua ke.
hom kev sib koom ua ke yog qhov sib koom ua ke?
Pivot sib koom, tseem hu ua rotary joint, lossis trochoid sib koom ua ke, hauv vertebrate anatomy, ib qho kev sib koom tes ywj pheej (diarthrosis)uas tso cai rau tib lub zog ntawm ib lub axis. Cov pob txha txav rotates nyob rau hauv ib lub nplhaib uas yog tsim los ntawm ib tug thib ob pob txha thiab ligament nyob ib sab.
YPuas yog tibiofemoral sib koom ua ke biaxial?
Lub hauv caug pob qij txha, tseem hu ua tibiofemoral sib koom, yog ib qho sib koom ua ke. Tshwj xeeb tshaj yog, nws yog biaxial, hloov kho pob khawm.
Cov pob qij txha ntawm qis qis yog biaxial?
Lub luj tshib yog piv txwv. Ib qho biaxial diarthrosis, xws li metacarpophalangeal sib koom ua ke, tso cai rau kev txav ntawm ob lub dav hlau lossis axes. Lub duav thiab lub xub pwg pob qij txha yog cov piv txwv ntawm multiaxial diarthrosis.
