Cerebrospinal fluid is what provides as a "cushion" for the brain. (I don't understand your question regarding blood supply)
The blood vessels around the brain help supply energy for your brain
When the blood supply to a portion of the brain is blocked this causes a stroke.
When the blood supply to a portion of the brain is blocked this causes a stroke.
When the blood supply to a portion of the brain is blocked this causes a stroke.
The brain lives when it has a constant supply of blood glucose and oxygen.
Insufficient supply of blood to the brain can cause fainting (syncope) or a more severe loss of consciousness.
the brain
The brain needs so much blood because it needs a constant supply of it to keep up with the neurons metabolic demands. 20 percent of the blood that comes from the heart is pumped directly to the brain.
There is a redundant blood supply to the brain to ensure uninterrupted oxygen and nutrient delivery, as the brain is highly sensitive to any disruption in blood flow. The redundancy comes from the two main arteries that supply the brain, the internal carotid arteries and the vertebral arteries, which can compensate for each other if one becomes compromised. This redundancy helps to minimize the risk of brain damage due to reduced blood flow.
A disturbance in the blood supply to the brain
The left brainial artery.
as insufficient oxygenated blood supply to brain