The persistent vegetative state

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Abstract
The condition is distinct from coma, in which patients have their eyes closed and lack sleep-wake cycles, and from the “locked-in” syndrome, in which patients are aware of themselves and their environment but have lost motor function and speech, communication being achieved by eye movement or blinks. Akinetic mutism is a rare syndrome in which movement is pathologically slowed or nearly absent and speech is lost but wakefulness and self awareness are variably preserved—though the …