Willis kaiapili a me Lolina o kona 'ole

Pôʻai o Willis - he vascular anatomical ho okumu, IIeEeAIEUIeXAIIUE ma ke kumu o ka lolo, a hoakaka i ka redistribution o ke koko ma waena o ka mea okoa vascular moe i loko o ke alo o ka lawa koko lako i ka lolo. He He paʻa iieeaii ia ho i ka vascular anastomosis.

E kahalina o Willis ua hana o ke alo a me ka hope ai pili aku arteries (PSA a me SAR), i ka loiloi mua Hoʻohana o ke alo, a me ka posterior cerebral artery (PCA a me PMA) nadklinovidnogo Hoʻohana o ka maloko carotid artery (ICA) a me ka distal basilar artery (oa).

Kona anterior hapa o ka collateral holo ua lawe mai ma waena o nā nenoai o ka carotid artery (no ka laʻana, ICA a me ACA pono side- PSA - ICA a me ACA haʻaleleʻaoʻao) a me ka hope pauku - ma waena o ka'ōnaehana o ka carotid artery, a me ka vertebrobasilar nenoaia (VSA - SAR - ZMA - oa ).

It E e hoʻomaopopo i ka mea maʻamau ke kino a me ka hoopau paʻa kaiapili o Willis kō wale ka hapalua o ke ao nei ka heluna. Laha i hypoplasia paha aplasia o ka PCA a me PMA, a me hypoplasia o PSA a me SAR. Ma ka anterior hapa o abnormalities ia akulla kekahi wahi emi ma mua o ka anomaly i loko o ka 'ole o ka hope mahele.

PSA ka loa ee iaaanu aey i loko o kona 'ole, ka nui a me ka wahi, e hiki no ia koho HEN, mai ole hoʻonaʻauao a hiki i ke akea fistula ma ke kahua o ka papa ACA, ia mea no hoi e hiki a pāpālua hoʻi a pākolu o ka PSA. Loa pohihihi keia "mua trifurcation" o ka anterior cerebral artery: nā PMA hoʻomaka ma kekahi o ka ICA. Ma keia hihia, o ka pōʻai o Willis i hamama ma o ka anterior. Muli o kona kulana he pohihihi keia anomaly o ke alo o nā ACA, a ua kapaʻia he artery Wilder.

O Kelaude maʻamau i loaʻa wale nō i loko o kahi o ka hapalua o ko ke ao nei ka heluna. Anomalies hindfoot hiki e loa ai like: nui hoʻolei nui like 'ole, asymmetric divergence o na lala o ka arteries, a hiki i ka wa e kaawale aku o Hoʻohana o arteries. Ka loa, he pono ole anomaly o ke koena unuhi i loko o ka ho o ka vertebral arteries: hypoplasia o kekahi i kekahi me ka i ka wā hoʻokahi hypertrophy. Ma ka keia kahua ka mea, ua manaoio aku i kekahi vertebral artery mea Hoʻohaku, a me ka 'ē aʻe mea recessive i loko o kā lākou mau nohona ma na makana no ke koko vertebrobasilar kīʻaha. ʻoluʻolu asymmetry o 50%. ZSA ma anawaena mea IeAUPIIe, IAa IO iki emi ma mua o ka PSA. He hoi loa ai, he pono ole hypoplasia SAR.

Lolina o ka pōʻai o Willis - haʻi mall anomaly o intracranial vertebrobasilar'ōnaehana:ʻaʻohe mea i piha unification o ka vertebral arteries ma na aoao a elua o ka papa kuhikuhiE artery anastomoses hiki hoʻohana kūpono 'ole o ka' ole a me nā arteries e noho kaʻawale. Ma ka hihia o ka basilar artery aplasia a SAR ua loaʻa Open hindfoot cerebral arterial hoa kanaka. Ua mea, mai ka hope o ka perforating lala e poʻomanaʻo, 'o ia ma ka meakino a me ka midbrain. Ua huli mai i ka hamama kaiapili o Willis hiki ia i loko o ka anterior Hoʻohana, a ma ka hope. A me ka mea hiki ke wehe loa (ʻaʻohe huina artery) a kāpili (ma hypoplasia ole hou).

Loli ma ka maʻamau 'ole o ka cerebral arterial kaiapili paha e kekahi congenital a loaa - i ka hopena o kekahi mau wahi o ka ka hoʻololiʻana i ka loli o ka olelo o hemodynamics i mau pathologies o na ipu kumu nui o ke poo, a pinepine hoʻomōhala i loko o kēia mau hihia. Ka loiloi 'ana o kekahi' hiʻona i loko o ka 'ole o ka vascular moe ua lawe mai e like me ka angiography a me ka mea nui loa i loko o neurological hana. He mea pono eʻike i loko o kaʻike, o ka loli ma ka arteries: ka mea i ka mea, a i hoʻomōhala like me ka hopena o pathological hou.