They tend to be located in the circle of Willis and its branches.

The latter can affect smaller vessels such as the branches of the circle of Willis.

The arteria comminicans are the three arteries in the brain that form the circle of Willis.

The former affects vessels such as the internal carotids, vertebral and the circle of Willis.

They are part of the Circle of Willis, which provides backup circulation to the brain.

Berry aneurysms are usually found in the region of the Circle of Willis.

It is part of the cerebral arterial circle, also known as the circle of Willis.

Considerable anatomic variation exists in the Circle of Willis.

Since they do not directly affect the Circle of Willis, they are not dealt with here.

Inside the skull, the arteries merge to form the basilar artery, which joins the circle of Willis.

Lower studied the arterial circle at the base of the brain, named the circle of Willis after his teacher.

Vesling also performed important studies of blood circulation, and was one the first physicians to describe the brain's circle of Willis.

The Circle of Willis, long considered to be an important anatomic vascular formation, provides backup circulation to the brain.

The redundancies that the Circle of Willis introduce can also lead to reduced cerebral perfusion.

The vertebral artery is accessed here in order to conduct angiography of the circle of Willis.

They do not have a Circle of Willis and stroke can be induced by common carotid artery occlusion alone.

Large vessel disease involves the common and internal carotids, vertebral, and the Circle of Willis.

The most common location for brain aneurysms is in the network of blood vessels at the base of the brain called the circle of Willis.

The MCAs are not considered a part of the Circle of Willis.

The anterior choroidal artery is in the brain, off of the internal carotid in the "circle of Willis".

Each basal cerebral artery of the circle of Willis gives origin to two different systems of secondary vessels.

Grasp reflex and or sucking reflex contralaterally (if circle of Willis compromised)

The posterior cerebral artery and the posterior communicating artery are within the circle of Willis.

The central branches supply the interior of the Circle of Willis, more specifically, the Interpeduncular fossa.

In subclavian steal syndrome, blood is "stolen" from the Circle of Willis to preserve blood flow to the upper limb.