What is the correct order of disorders from the most to least severe?
A) minimally conscious state, persistent vegetative state, coma
B) coma, persistent vegetative state, minimally conscious state
C) persistent vegetative state, coma, minimally conscious state
D) minimally conscious state, coma, persistent vegetative state
Answer: B
Rationale: A coma is a state marked by a complete loss of consciousness. If a patient in a coma improves slightly, he or she is likely to enter a persistent vegetative state (PVS), a state of minimal to no consciousness, where the patient's eyes may be open, and he or she will develop sleep-wake cycles although there are no clear signs of consciousness. The least severe of these disorders is the minimally conscious state (MCS), a disordered state of consciousness marked by the ability to show some behaviors that suggest at least partial consciousness, even if on an inconsistent basis.
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