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Arteries that supply the brain and the formation of circulus arteriosus cerebri in donkeys

100%

Ozgel O. , Dursun N. , Oto C.

tom 63

nr 12

1561-1563

The study investigated the anatomy of the arteries of the brain in seven donkeys following intravascular injection of colored latex via the a. vertebralis and a. carotis communis. Arterial blood washed the brain via the bilateral a. carotis interna and a. vertebralis and via the unpaired a. basilaris. A. carotis interna entered the cavum cranii at the level of sulcus pontocruralis, and ramified at the level of the corpus mamillare into a. cerebri rostralis and a. communicans caudalis. At the level intracranial entry, a. carotis interna gave rice to a. caroticobasillaris which was bilaterally present in 4 cases and unilaterally in 1 animal, a. caroticobasillaris, whereas the other branch was and a. constant a. intercarotica caudalis which was located at the level of sulcus pontocruralis. In one cadaver, a very slender a. intercarotica rostralis originated from a. carotis interna at the level of the origin of a. cerebri rostralis, and joined its counterpart vessel at the border between tuber cinereum and chiasma opticum. In all cases, a. ethmoidalis interna originated from a. cerebri rostralis. It was observed that a. cerebri rostralis dextra et sinistra fused directly into a. single median vessel named a. communicans rostralis.

Arteries supplying the base of the brain in the Mongolian gerbil [Meriones unguiculatus]

80%

Kuchinka J. , Nowak E. , Szczurkowski A. , Kuder T.

tom 11

nr 4

295-299

Using stained acryl latex injected techniques the arteries of the base of the brain in the Mongolian gerbil (Meriones unguiculatus) were studied. The brain of the Mongolian gerbil is supplied with blood by even internal carotid arteries and odd basilar artery. The branches of the internal carotid arteries supply the forebrain and interbrain. They form the arterial circle at the base of the brain. The basilar artery is a source of blood for the midbrain and hindbrain. In this species, except one case, the opened type at the back side of arterial circle was found. The posterior communicating arteries between basilar artery and internal carotid arteries were not observed.