Starting CPR promptly certainly makes a huge difference in assuring that the brain gets enough blood and oxygen. Those people who have resuscitation started promptly in the field do much better than the person who lays lifeless and unattended on the ground, awaiting EMS to arrive. During these precious moments , systems are shutting down and brain cells are being irreversibly damaged. Since the flow of blood and oxygen are being cut off to the entire brain, the damage is generalized, throughout the entire brain. But, some sections are more vulnerable than others and will get in trouble earlier than others.
Lets look at a few.
This serpent- shaped part of the temporal lobe on the side of your brain is named after a sea horse. It is intimately involved with our memory. This is the part of the brain affected in Parkinson's disease and movement disorders- smoothing and controlling movements. This is the gray matter of nerve cells that covers the surface of the brain. The brainstem sitting at the bottom of the brain between the cerebral cortex and the spinal cord is relatively spared during episodes of hypoxia or ischemia.