<unk>  are medical conditions that inhibit consciousness. Some define<unk>  as any change from complete self-awareness to inhibited or absent self-awareness and arousal. This category generally includes minimally conscious state and persistent vegetative state, but sometimes also includes the less severe locked-in syndrome and more severe but rare chronic coma. Differential diagnosis of these<unk>  is an active area of biomedical research. Finally, brain death results in an irreversible disruption of consciousness. While other conditions may cause a moderate deterioration (e.g., dementia and delirium) or transient interruption (e.g., grand mal and petit mal seizures) of consciousness, they are not included in this category.
Disorders of consciousness
Confusion
Stroke recovery
Unconsciousness
Lethargy
Clouding of consciousness
Excited delirium
Sickness behavior