Circulus arteriosus

Circulus arteriosus (also known as the Circle of Willis) is a crucial part of the human anatomy, specifically within the cardiovascular system. It is a circular network of arteries that supply blood to the brain and surrounding structures.

Anatomy

The circulus arteriosus is located at the base of the brain. It is formed by the anastomosis (connection) of several major arteries, including the left and right internal carotid arteries and the basilar artery. These arteries branch off into smaller arteries that supply specific areas of the brain.

Function

The primary function of the circulus arteriosus is to provide a consistent and redundant blood supply to the brain. This redundancy is crucial because it allows blood to flow around potential blockages, ensuring that the brain always receives enough oxygen and nutrients.

Clinical significance

The circulus arteriosus is of significant clinical importance. Abnormalities or blockages in this arterial circle can lead to serious conditions such as stroke or aneurysm. Furthermore, variations in the structure of the circulus arteriosus have been associated with certain neurological conditions, such as migraine and Alzheimer's disease.

See also

• Cardiovascular system
• Internal carotid artery
• Basilar artery
• Stroke
• Aneurysm