Central nervous system ischemia

Patent Granted The central ischaemic response is triggered by an inadequate supply of oxygenated blood in the brain. The respiratory system may contribute to oxygen levels through hyperventilation, though a sudden ischaemic episode may also proceed faster than the respiratory system can respond. These processes cause the typical symptoms of fainting: pale skin, rapid breathing, nausea and weakness of the limbs, particularly of the legs. If the ischaemia is intense or prolonged, limb weakness progresses to collapse.