A systematic study of the brain base arteries in the rabbit (Oryctolagus cuniculus)

Abstract

Pesq. Vet. Bras. 33(6):796-806, junho 2013 796 RESUMO.-[Sistematização das artérias da base do encé-falo e suas fontes de suprimento sanguíneo em coelho da raça Nova Zelândia (Oryctolagus cuniculus).] Foram utilizados 30 encéfalos de coelhos Nova Zelândia (Oryctolagus cuniculus), injetados com látex, corado em vermelho, com objetivo de sistematizar as artérias da base do encéfa-lo e suas fontes de suprimento sanguíneo. Sistematizou-se a origem das fontes de suprimento sanguíneo para o en-A systematic study of the brain base arteries in the rabbit (Oryctolagus cuniculus) The brains of 30 New Zealand rabbits (Oryctolagus cuniculus) were injected with red stained latex. The arteries of the ventral surface of the brain were systematized on the right (R) and on the left (L) side with the respective percentage of appearance: the aortic arch emitted the braquicephalic trunk and the left subclavian artery (83.3%); or the braquicephalic trunk, the left common carotid artery and the left subclavian artery (16.7%). The braquicephalic trunk emitted the right and the left common carotid arteries and the right subclavian artery (83.3%); or the right common carotid artery and the right subclavian artery (16.7%). The common carotid arteries were divided into external and internal carotid arteries (96.7% on the R, 100% on the L.). The internal carotid artery to the R was present (96.7%) and absent (3.3%), and to the L, was present (100%). The rostral choroidal artery to the R was collateral branch of the rostral branch of the internal carotid artery (83.3%), collateral branch of caudal branch of the internal carotid artery (16.7%), and to the L was collateral branch of the rostral branch of the internal carotid artery (93.3%), collateral branch of the caudal branch of the internal carotid artery (6.7%). The middle cerebral artery to the R and to the L was single (80%) and double (20%). The rostral cerebral artery to the R had middle caliber (90%), thin caliber (6.7%) and too thin caliber (3.3%), and to the L had middle caliber (76.7%), thin caliber (16.7%) and too thin caliber (6.7%). The internal ethmoidal artery was absent (73.3%), present and single (26.7%). The caudal cerebral artery to the R was single (66.7%), double (26.7%) and triple (6.7%), and to the L was single (63.3%) and double (36.7%). The terminal branches of the right and left vertebral arteries were present (100%, and formed the basilar artery (100%). The ventral spinal artery was present (100%). The caudal cerebellar artery, to the R was single (43.3%), single with labyrinthic artery isolated (26.7%) and double (30%), and to the L was single (50%), single with labyrinthic artery isolated (6.7%), double (40%) and triple (3.3%). The trigeminal artery to the R and to the L was present (100%). The rostral cerebellar artery to the R was single (53.3%) and double (46,7%), and to the L was single (63.3%) and double (36.7%). The rabbit's cerebral arterial circle was caudally closed (100%) and rostrally closed (93.3%) or opened (6.7%). The brain was supplied by th...

The Arteries of the Brain in Hare (Lepus europaeus Pallas, 1778)

“…In two brains (5.3%) the opened arterial circle of the brain was observed in the rostral part. A similar phenomenon was described by Barone (), Brudnicki et al (), and De Souza and Campos () in rabbit.…”

“…Brudnicki et al () and De Souza and Campos (), describing the brain base arteries in New Zealand rabbits, suggest that caudal cerebral arteries were created as a result of anastomosis of the caudal communicating artery with the terminal branch of the basilar artery. The construction and method of departure of caudal cerebral arteries in hare confirm this statement.…”

The arteries of the brain base in the degu (Octodon degus Molina 1782)

“…One of the arteries descended from the caudal communicating artery, while the other became separated from the basilar artery. Asymmetries in the separation of rostral cerebellar arteries were described in the rabbit de Souza and Campos 2013). The descent of the rostral cerebellar artery varies between species.…”

Analysis of morphological variation of the internal ophthalmic artery in the chinchilla (Chinchilla laniger, Molina)

“…In the rabbit (Oryctolagus cuniculus), Davis (1929) defined the ophthalmic artery as a very thin internal branch of the carotid artery. Brudnicki et al (2012) and De Souza and Campos (2013) described the internal ophthalmic artery in the wild rabbit (Oryctolagus cuniculus) to originate from the vessels of the cerebral arterial circle at the height of the rostral choroidal artery and as the lateral branches of rostral and caudal branches of the internal carotid artery. In the lesser mole rat (Spalax leucodon), the internal ophthalmic artery is a branch of the internal carotid artery ).…”