RT Book, Section A1 Simon, Roger P. A1 Aminoff, Michael J. A1 Greenberg, David A. SR Print(0) ID 1148742494 T1 Seizures & Syncope T2 Clinical Neurology, 10e YR 2017 FD 2017 PB McGraw-Hill Education PP New York, NY SN 9781259861727 LK accessmedicine.mhmedical.com/content.aspx?aid=1148742494 RD 2024/04/19 AB Consciousness is lost when the function of both cerebral hemispheres or the brainstem reticular activating system is compromised. Episodic dysfunction of these anatomic regions produces transient, and often recurrent, loss of consciousness. There are two major causes of episodic loss of consciousness: seizures and syncope.