Cerebral blood flow map

The human skull includes three parts: brain tissue, cerebrospinal fluid and blood. In general, brain tissue and cerebrospinal fluid are relatively constant, and blood flowing into the brain is prone to change. Blood has the smallest electrical impedance and the highest electrical conductivity. Based on this feature, people have designed a device called a cerebral blood flow meter to measure the degree of cerebral arteriosclerosis. By measuring the change in the electrical conductivity of the brain, the comprehensive change in the resistance between the two electrodes is reflected. After being enlarged and recorded, it is called a cerebral blood flow map.