Chinthu chimodzi chotchedwa capsule ndi malo omwe amagwiritsira ntchito minofu yomwe imatseketsa ndi kutsegula mbaliyi (yomwe imatchedwanso zygapophysis kapena zygapophyseal joint) kuchokera pamwamba mpaka pansi. Minofu imeneyi imapanga mthunzi wambiri womwe umagwira mafupa awiri omwe amapanga mbaliyi pamodzi.
Malinga ndi kafukufuku wofotokozera wa anatomical yomwe inafalitsidwa mu Journal 2011 ya Biomechanical Engineering , mwezi wa July 2011, chida chophatikizanachi chimagonjetsa mphamvu zamaganizo zomwe zimapangidwira palimodzi pamene zimasinthasintha.
Kusintha kwamasulidwe ndi omwe amapita molunjika. Kuyenda ndi chitsanzo, koma mukakamba za kugwirizana, tanthawuzo ndilobisika. Pankhaniyi, imatanthauzira zowonjezereka (kutanthauza kuti palibe kutembenuka kapena kupotoza) kutuluka kwa fupa la msana kumbali imodzi kapena pansipa.
Pamodzi ndi zigawo zonse zomwe zimapanga mbaliyi, kapsule imathandiza kusinthana mitundu yosiyanasiyana pamagulu osiyanasiyana a msana.
Mtundu uliwonse umakhala ndi zigawo zinayi - pamwamba pawiri (zotchedwa zigawo zapamwamba) ndi ziwiri pansi (zomwe zimatchedwa pansi). Minofu yowonjezera ya capsule imamangiriza mgwirizano wonse. Mkati mwazowonjezeramo ndi yophimba (yotchedwa synovial lining) yomwe imapangitsa synovial madzi. Madzi a Synovial ali ngati WD-40 chifukwa chophatikizirana - amachititsa mafupa omwe amapanga mbaliyi, komanso malo omwe amakhalapo pakati pawo, omwe amathandiza kupanga zosalala, zopanda mantha.
Kapule wa chigawo chophatikizana - komanso mbali zina za mgwirizano - zimaperekedwa ndi mitsempha - zomwe zimawathandiza kuwona kupweteka. Kafukufuku wofalitsidwa mu magazini ya American Journal of Neuroradiology akuti njira imodzi yomwe imatha kupweteka kwapambuyo imalengedwa ndi mwachisawawa. (Olembawo amatchedwanso kutayika kwa mitsempha ndi kutupa monga ena omwe angapweteketsere magetsi.) Amati ziwalo zapakati zimakhala ndi zovuta zokwana 45 peresenti ya zowawa zapweteka m'mimba ndipo pafupifupi 55% amamva kupweteka kwapakhosi popanda kupweteka.
Zotsatira:
Bykowski, J., Wong, W., Udindo wa Zilumikizo zapakati pa Ululu Wopweteka ndi Chithandizo Chakutsogolera Zithunzi: Kufotokozera . AJNR.
Jaumard, N., Welch, W., Winkelstein, B. Spinal Facet Biomechanics Yogwirizana ndi Mechanotransduction Mwachizoloŵezi, Chovulaza ndi Zowonongeka. J Biomech Eng. July 2011.
Schulte T., Filler T., Struwe P., Liem D., Bullmann V. Mapazi Amkati Amkati a Thoracic Zygapophysial Joints. Mphepete. March 15, 2010.