Cerebral anemia? What?

wasnt getting enough blood to the brain=lightheadedness

Anemia is lack of Iron in the blood, but cerebral anemia is "Cerebral Anemia. ... Thus cerebral anemia may attend the general anemia coming from a severe hemorrhage or from profuse diarrhea, or from pernicious anemia, leukemia, and various cachexias, or it may be due to the accumulation of a large quantity of blood in the peritoneal cavity following the removal of ascitic fluid."
The nurse said he was merely fatigued from lack of sleep ... so O.O