Telencephalon vascularity in sheep (Ovis aries)

Abstract

The studies into the vascularity of the telencephalon in Polish Merino sheep of both sexes were made on 60 cerebral hemispheres. It was found that the middle cerebral artery is the most powerful vessel supplying blood to the telencephalon. The artery gets divided into ten permanent branches. Two olfactory arteries supply the area of the telencephalon located on the border between the old and the new cortex. The other eight branches get divided into three branches running to the region of the frontal lobus of the brain, two branchesto the region of the parietal lobus and three temporal branches heading for the temporal region, supplying blood to the new cortex only. The frontal, parietal and temporal branches descended independently from the main trunk of the middle cerebral artery or first formed a common trunk. Common trunks for respective groups of branches have been referred to as: the anterior, superior and posterior middle cerebral arteries. The posterior olfactory artery in 6.7% of the cases was an independent branch from the rostral cerebral artery.

Mapping the branching pattern of the middle cerebral artery in the camel (Camelus dromedarius): a comprehensive anatomical analysis

“…Our study revealed that although the MCA typically descended as a single trunk in 60% of the hemispheres, it emerged as two branches from the RCA in 40% of the samples. Skoczylas et al ( 34 ) reported that the MCA in sheep descended as a single artery in 93.3% of the samples, while having two independent origins in 6.7% of the samples.…”

Arterial Circle of the Brain of the Red-Necked Wallaby (Notamacropus rufogriseus)

“…In some individuals, the division of the middle cerebral artery occurred in the dorsally located point, while in others there was found a double middle cerebral artery [ 38 , 39 ]. The dorsal temporal branch was the strongest in the sheep, polar fox, and silver fox [ 21 , 37 , 40 ].…”