The American Academy of Neurology (AAN) proposes that all four criteria and conditions be met when determining a vegetative state: ① no evidence of commanded movements; ② no intelligible verbal response; ③ no discernible conscious verbal and postural verbal conversation and communication; ④ no signs of any locomotor or voluntary motor response. Minimal consciousness or micro-consciousness is defined as: ① the presence of repeatable but uncoordinated movements as instructed; ② the presence of intelligible speech; ③ communication response through discernible speech or sign language; ④ the presence of locomotor or voluntary motor response. If any of the above 4 criteria can be met, then this patient can be classified as minimally conscious. Commonalities between the two: ① Patients can open their eyes unconsciously; ② Patients can have a sleep-wake cycle.