In those cases, the spread between the bid & ask goes to the market maker as compensation for making a market in a stock. For a liquid stock that is easy for the market maker to turn around and buy/sell to somebody else, the spread is small (narrow).
In cerebral hypoxia, sometimes only the oxygen supply is interrupted. Brain cells are extremely sensitive to a lack of oxygen. Some brain cells start dying less than 5 minutes after their oxygen supply disappears. As a result, brain hypoxia can rapidly cause severe brain damage or death.
Cooling saves lifes after a heart attack. Taking the body down to a hypothermic state within hours can save not only heart muscle but improve the severity of a brain injury.Within four minutes of a heart attack brain cells begin to die off.Doctors have had the technology for several years for therapeutic hypothermia.aking the body down to a hypothermic state within hours can save not only heart muscle but improve the severity of a brain injury. Within four minutes of a heart attack brain cells begin to die off. Doctors have had the technology for several years for therapeutic hypothermia.