Morphometry and Variability of the Brain Arterial Circle in Chinchilla (Chinchilla laniger, Molina)
Autor: | Jacek Kuchinka |
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Rok vydání: | 2017 |
Předmět: |
0301 basic medicine
Chinchilla Histology biology 040301 veterinary sciences business.industry Carotid arteries Arterial circle 04 agricultural and veterinary sciences Anatomy Chinchilla chinchilla 0403 veterinary science 03 medical and health sciences biology.animal medicine.artery Basilar artery Medicine 030101 anatomy & morphology business Ecology Evolution Behavior and Systematics Biotechnology Ventral spinal artery Circle of Willis |
Zdroj: | The Anatomical Record. 300:1472-1480 |
ISSN: | 1932-8486 |
Popis: | Arterial circles of brains from 70 adult chinchillas were filled with synthetic latex. The arterial circle of the brain is formed as the result of vertebral arteries being merged into the basilar artery. Caudally, both vertebral arteries gave rise to the ventral spinal artery. The ventral spinal artery splits into tiny cerebellar vessels, the pontine and cochlear branches. Distally, the basilar artery ramified into two terminal branches that formed the arterial circle of brain, rostrally open in most cases (75%). The observed variability of the arterial circle of brain of chinchillas pertained to all elements of that circle. The greatest variability within the vessels of the circle of Willis in chinchillas was observed in 22 cases (31.4%) of internal ophthalmic arteries. In chinchillas, a trend toward slight variability within the arteries comprising the arterial circle of the brain was observed in 44 animals. This accounted for 62.8% of all cases. Only in three cases was the arterial circle of brain clearly symmetrical. At the same time, 23 animals (32.8%) revealed features of significant vascular variability within the brain base region. These consisted of disturbed geometry of the entire arterial circle, different levels of ramifications into individual arteries, as well as the number and diameter of arteries. No internal carotid arteries were observed in chinchillas apart from one atypical case in which the carotid artery extended unilaterally into the basilar artery. These investigations indicate on the significant variability of arterial circle in rodents. Anat Rec, 300:1472-1480, 2017. © 2017 Wiley Periodicals, Inc. |
Databáze: | OpenAIRE |
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