👉 The term "epicortical" is a medical term used to describe a type of blood vessel that is larger than normal. It's called this because it is found in the largest vessels, which are also known as cerebral arteries or carotid arteries. These large arteries carry oxygenated blood from the heart and deliver it to the brain. The epicortical vessels are often described as "large" because they have a diameter of up to 2.5 millimeters, which is significantly