Condyloid thiab eeb pob qij txha yog biaxial. … Lub pob multiaxial thiab lub qhov (socket) pob qij txha tso cai rau flexion-extension, abduction-adduction, thiab circumduction. Tsis tas li ntawd, cov no kuj tso cai rau medial (internal) thiab lateral (sab nraud) rotation. Pob-thiab-socket pob qij txha muaj qhov zoo tshaj plaws ntawm kev txav ntawm txhua qhov sib koom ua ke.
Yuav ua li cas sib koom ua tsis tau kev hla?
Humeroulnar sib koom tsis tuaj yeem ua kev hla. Kev sib koom humeroulnar tuaj yeem ua flexion thiab txuas ntxiv.
Yuav ua li cas txav cov pob qij txha biaxial tso cai?
Synovial: Condyloid
Ib qho sib koom ua ke, lossis kev sib koom ua ke ellipsoid, txhais tau tias yog ib qho kev sib txuas ntawm kev nyuaj siab ntawm ib pob txha thiab cov qauv sib npaug ntawm lwm cov pob txha lossis pob txha. Hom kev sib koom ua ke no yog biaxial vim nws tso cai rau ob lub axes ntawm kev txav: flexion / txuas ntxiv thiab medial / lateral (abduction / adduction).
Puas lub xub pwg nyom?
Tib neeg lub xub pwg nyom yog qhov sib koom tes sib koom ua ke hauv lub cev. Qhov kev txav mus los no muab rau sab sauv kawg nrog ntau yam ntawm kev txav xws li adduction, abduction, flexion, extension, internal rotation, external rotation, and 360° circumduction nyob rau hauv lub dav hlau sagittal.
Kev ntiv tes xoo yog dab tsi?
Circumduction piav qhia kev txav ntawm thawj metacarpal nkaus xwb ntawm carpometacarpal sib koomlos ntawm qhov siab tshaj plaws radial adduction hauv lub dav hlau ntawm xibtes mus rau ulnar ciam teb ntawm testuav lub kaum sab xis dav tshaj plaws ntawm thawj thiab thib ob metacarpals.
