tentorial herniation /tentôr′ē·əl/ [L, tentorium, tent, hernia, rupture] , the protrusion of brain tissue into the tentorial notch, caused by increased intracranial pressure resulting from edema, hemorrhage, or a tumor. Characteristic signs are severe headache, fever, flushing, sweating, abnormal pupillary reflex, drowsiness, hypotension, and loss of consciousness. Also called transtentorial herniation.
