<prompt> Normal cerebral blood flow is45 mlmin for every 100gm of brain tissue55 mlmin for every 100gm of brain tissue65 mlmin for every 100gm of brain tissue75 mlmin for every 100gm of brain tissue  <response>: Normal cerebral bloodflow CBF is about 55 mL per minute for every 100 gramsof brain tissue. Ischaemia results when this rate drops below20 mL per minute, and even lower levels will result in infarctionunless promptly corrected.Flow depends on cerebral perfusion pressure CPP, the difference between mean aerial pressure MAP and intracranial pressure ICP.CPP 75-105 mmHg MAP 90-110 mmHg - ICP5-15 mmHgBailey and love 27e 328 