Willis bwalo ndi mitundu ya akuphatikizapo

Lozungulira Willis - ndi mtima anatomical mapangidwe, isanafalikire pa m'munsi mwa ubongo zomwe imapereka kusokonekera kwa magazi pakati pa mabedi osiyana mtima pamaso pa kotunga osakwanira magazi ku ubongo. Ndi chatsekedwa polygon woimira anastomosis mtima.

Lozungulira Willis aumbike kutsogolo ndi kumbuyo polumikiza mitsempha (PSA ndi akuti sar), ndi gawo koyamba kutsogolo ndi zapambuyo oziziritsa mtsempha wamagazi (PCA ndi PMA) nadklinovidnogo gawo la mkati carotid mtsempha wamagazi (ICA) ndi wapotalikira basilar mtsempha wamagazi (o).

zapambuyo mbali ya kufalitsa ina ikuchitika pakati pa kachitidwe wa mtsempha wamagazi ndi carotid (mwachitsanzo, ICA ndi ACA bwino side- PSA - ICA ndi ACA anasiya mbali) ndi gawo kumbuyo - pakati pa mapeto a mtsempha wamagazi ndi carotid ndi vertebrobasilar system (VSA - akuti sar - ZMA - o ).

Tikumbukenso kuti bwinobwino anayamba ndi mokwanira chatsekedwa bwalo la Willis akukumana alionse padziko lonse theka. Ponseponse ndi hypoplasia kapena aplasia wa PCA ndi PMA, ndi hypoplasia wa PSA ndi akuti sar. Mu gawo zapambuyo cha kuvutika wapezeka pang'ono poyerekeza ndi anomaly mu kapangidwe ka gulu kumbuyo.

PSA ndi variable kwambiri matabwa ake, kukula ndi malo, ndi options zotheka kuyambira maphunziro ku fistula lonse pa malo kukhudzana ACA, n'zothekanso anawaonjezera kuwirikiza kawiri kapena tripling wa PSA lapansi. chosowa kwambiri "trifurcation kutsogolo" wa zapambuyo oziziritsa mtsempha wamagazi: onse PMA kuyamba pa imodzi mwa ICA. Pankhaniyi, bwalo la Willis ndi lotseguka mu zapambuyo lapansi. Ndithu osowa anomaly ndi kukhalapo kwa ACA zina, amene akutchedwa mtsempha wamagazi olandiridwa.

Kauda zambiri imapezeka pafupifupi theka la anthu onse padziko lapansi. Anomalies hindfoot akhoza kukhala osiyanasiyana ndithu: lalikulu makulidwe kuwanditsa, asymmetric divergence a nthambi za mitsempha, kapena kusapezeka kwa zigawo za mitsempha. The anomaly ambiri kusiyana mu diameters ya mitsempha vertebral: hypoplasia a wina ndi mzake ndi hypertrophy munthawi yomweyo. Pa gawo panopa ali anakhulupirira kuti mtsempha wamagazi vertebral ndi lalikulu ndi ina recessive mu zopereka zawo wonse kwa m'magazi vertebrobasilar beseni. Yovomerezeka asymmetry 50%. ZSA awiri kawirikawiri pang'ono zosakwana PSA lapansi. Ndi zachilendo hypoplasia akuti sar.

Zosinthika cha bwalo la Willis - kutchulidwa structural anomaly a dongosolo intracranial vertebrobasilar: palibe yogwirizanitsa kwathunthu kwa mitsempha vertebral mbali zonse za mtsempha wamagazi waukulu anastomoses zotheka kugwiritsa ntchito dongosolo kapena mitsempha ali okhaokha. Mu nkhani ya basilar mtsempha wamagazi aplasia kapena akuti sar kwaiye TSEGULANI hindfoot oziziritsa wolumikizira bwalo. Ndi kuchokera kumbuyo kwa nthambi perforating atsala mu sing'anga ndi midbrain. Iwo likukhalira kuti bwalo lotseguka Willis akhoza kukhala mu gawo zapambuyo, ndi kumbuyo. Ndipo akhoza anatsegula kwathunthu (palibe mtsempha wamagazi lumikiza) ndi chosakwanira (pa hypoplasia kapena kuchepetsa).

Kusintha kapangidwe wabwinobwino wa wolumikizira bwalo oziziritsa ikhoza kukhala kobadwa nako kapena kugula - chifukwa cha mbali zina za anatengera kwa zinthu zinasintha wa hemodynamics mu pathologies zosiyanasiyana ziwiya chachikulu mutu, nthawi zambiri kukhala milandu. Aziona zinthu zenizeni mu dongosolo la kama mtima ikuchitika malinga angiography ndi zofunika kwambiri kuchita ubongo. M'pofunika kusiyanitsa mu matenda a kusintha mu mitsempha ya: kodi ndi chifukwa ndi chimene kukhala chifukwa cha kusintha pathological.