Sistematização das artérias na base do encéfalo e suas fontes de suprimento sanguíneo em peru (Meleagris gallopavo)

Thirty heads with neck segments of turkeys (Meleagris gallopavo) were dissected for a systematic study of the arteries. The frequency of the arteries found was: Cerebral carotid artery, intercarotid anastomosis and internal ophthalmic artery (100%). Caudal branch of the cerebral carotid artery to the right (R) vestigial artery (70%) and developed (30%) and to the left (L) developed (70%) and vestigial artery (30%). Ventral tectal mesencephalic artery in (70%) to R and (30%) to L was the direct branch of the cerebral carotid artery to L (70%) and to R (30%) collateral branch of the developed caudal branch. Basilar artery to L in (70%) and to R (30%) formed from the developed caudal branch; rostral ventral cerebellar artery present (86.7%) and absent (13.3%) to R and L. Caudal ventral cerebellar artery to R single (73.3%), double (23.3%) and triple (3.3%); caudal ventral cerebellar artery to L single (73.3%) and double (26.7%). Dorsal spinal artery branch of caudal ventral cerebellar artery to R (80%) and to L (73.3%). The rostral branch of cerebral carotid artery showed as collateral branches the single caudal cerebral artery to R (100%) and to L (96.7%) while in (3.3%) it was double. The middle cerebral artery was single to R and L (100%). Cerebroethmoidal artery to R and L (100%) with its collateral branch to single rostral cerebral artery (90%) to R and (86.7%) to L and double (10%) to R and (13.3%) to L. Ethmoidal artery to R and to L (100%) single. The cerebral arterial circle was rostrally and caudally opened, so that the cerebral blood supply was exclusively made by the carotid system.Trinta cabeças de peru Meleagris gallopavo , com segmento de pescoço, foram dissecados para o estudo sistemático das artérias. As maiores ocorrências das artérias foram: Artéria (A.) carótida do cérebro, anastomose intercarótica e A. oftálmica interna (100%). Ramo caudal da carótida do cérebro à direita (D) vestigial (70%) e desenvolvido (30%) e à esquerda (E) desenvolvido (70%) e vestigial (30%). A A. tectal mesencefálica ventral em (70%) à D e (30%) à E foi ramo direto da A. carótida do cérebro à E (70%) e à D (30%) ramo colateral do ramo caudal desenvolvido. A A. basilar à E em (70%) e à D (30%) formou- se do ramo caudal desenvolvido. A. cerebelar ventral rostral presente (86,7%) e ausente (13,3%) à D e E. A. cerebelar ventral caudal à D única (73,3%), dupla (23,3%) e tripla (3,3%). A. cerebelar ventral caudal à E única (73,3%) e dupla (26,7%). A. espinhal dorsal ramo da A. cerebelar ventral caudal à D (80%) e à E (73,3%). O ramo rostral da A. carótida do cérebro apresentou como ramos colaterais a A. cerebral caudal à D única (100%) e à E (96,7%) já em (3,3%) era dupla; A. cerebral média única à D e E (100%). A. cerebroetmoidal à D e E (100%) com seu ramo colateral a A. cerebral rostral única (90%) à D e (86,7%) à E e dupla (10%) à D e (13,3%) à E. A. etmoidal à D e à E (100%) única. Observou-se que o círculo arterial cerebral foi aberto rostralmente e caudalmente e o suprimento de sangue para o encéfalo foi exclusivamente pelo sistema carotídeo