The Anatomy of Circulus Arteriosus Cerebri (Circle of Willis): A Study in Turkish Population.

VARIATIONS IN THE CIRCULUS ARTERIOSUS OF WILLIS: AUTOPSY FINDINDS IN 101 HUMAN CADAV ERS

In order to evaluate the microvascular anatomy and the interconnections, 101 fixed brains from human cadavers with a mean age of 41.3 years were subjected to objective scrutiny. Symmetry was visualized with an unaided eye and measurements made under microscopic magnification technique using a micrometer. Classic symmetry was observed in only 19 of the specimens, whereas the rest of the 82...

Influence of Gender and Age on Average Dimensions of Arteries Forming the Circle of Willis Study by Magnetic Resonance Angiography on Kosovo’s Population

BACKGROUND Circulus arteriosus cerebri is the main source of blood supply to the brain; it connects the left and right hemispheres with anterior and posterior parts. Located at the interpenducular fossa at the base of the brain the circle of Willis is the most important source of collateral circulation in the presence of the disease in the carotid or vertebral artery. AIM The purpose of the r...

Sensibility during slaughter without stunning in cattle.

The following matter needs to be addressed. In his seminal works on the circulus arteriosus in Cerebri Anatome in 1664 and De Anima Brutorum in 1672, Thomas Willis described the blood supply to the base of the brain in a number of animal species and, more importantly, founded the discipline of clinical neuroscience. The detailed comparative physiology and species differences between ovine and b...

A Spectacular Endoscopic Anatomy of the Pituitary Gland and the Circle of Willis in a Living Person

Anomalous formation of the circulus arteriosus and its clinico-anatomical significance.

Circulus arteriosus (Circle of Willis) is an anastomotic ring which unites the internal carotid and vertebrobasilar systems. It slows down the blood before it reaches the brain and helps in collateral circulation. Anatomic study reveals the variation in the pattern and calibre of vessels which make up the circulus arteriosus. The greatest variation in calibre occurs in the posterior communicati...