Arterial Circle of the Great Brain

Arterial Circle of the Great Brain: Structure and Function

The cerebral arterial circle, also known as the circle of Willis or polygon, is a system of arteries that supplies the brain with blood. It is a closed system of arteries that surround the base of the brain and connect to each other to form a ring.

The arterial circle of the cerebrum includes the following arteries: anterior cerebral arteries, posterior cerebral arteries, arteries of the upper and lower brain stems, as well as two connecting arteries - the anterior and posterior communicating arteries.

The anterior cerebral arteries are located along the upper part of the anterior frontal region of the brain and provide blood supply to the frontal and parietal lobes of the brain. The posterior cerebral arteries lie along the back of the brain and supply blood to the occipital, parietal, and occipitotemporal lobes of the brain. The arteries of the superior and inferior brainstems provide blood supply to the brainstem and cerebellum, respectively.

The anterior and posterior communicating arteries connect the anterior and posterior cerebral arteries, respectively, forming a ring around the base of the brain. These connecting arteries play an important role in maintaining blood flow to the brain, especially if one of the main arteries becomes diseased or blocked.

The arterial circle of the cerebrum plays an important role in supplying the brain with oxygen and nutrients. It also helps maintain a constant blood supply to the brain, despite possible problems with individual arteries. In addition, the cerebral arterial circle may be involved in regulating blood pressure in the brain.

Despite its importance, the cerebral arterial circle can become subject to diseases such as aneurysms, thrombosis or embolism. These diseases can impair the blood supply to the brain and have serious health consequences. Therefore, it is important to seek medical help if symptoms related to poor circulation in the brain occur.

In conclusion, the cerebral arterial circle is an important arterial system that supplies the brain with essential nutrients and oxygen. It also plays an important role in maintaining a constant blood supply to the brain, especially in cases of problems with individual arteries. Despite this, diseases of the cerebral arterial circle can have serious health consequences, so it is important to monitor your health and seek medical help if necessary.

If you are at risk of developing cerebral arterial disease, for example if you have a family history or suffer from other conditions such as hypertension or diabetes, then it is important to take steps to reduce your risk of circulatory problems. This may include the following measures:

  1. To give up smoking
  2. Moderate exercise
  3. Proper nutrition
  4. Cholesterol and Blood Pressure Management
  5. Taking medications prescribed by your doctor to reduce the risk of circulatory problems.

In general, the arterial circle of the cerebrum is an important system providing blood supply to the brain. The proper functioning of this system is important for maintaining brain health and preventing possible diseases. If you have concerns or questions about your brain health, consult your doctor for advice and guidance.



The arterial circle of the cerebellum is a closed ring of cerebral vessels that unite in the anterior part of the corpus callosum. It is one of the components of the vascular system of the brain and provides blood supply to its different parts. This arterial circle is considered one of the largest arterial circles of the brain,