The medical subspecialty of Neurocritical Care is devoted to the comprehensive, multisystem care of the critically-ill neurological patient. Like other intensivists, the neurointensivist assumes the primary care role for his or her patients in the ICU, coordinating both the neurological and medical management of the patient. Hence, the Neurocritical Care Core Curriculum is evenly split between neurological and medical diseases and conditions, and fellowship training may include rotations through non-neurological ICUs. Most uniquely, neurocritical care is concerned with the interface between the brain and other organ systems in the setting of critical illness.