Studies were made on the vegetative propagation coefficient and cormel's biological characters using eighth-excision in different development phase of Lycoris radiate.
A coma can progress into a persistent vegetative state or even locked-in syndrome, when a person is aware of themselves and their surroundings but cannot speak or move.
To fill that gap Kurt Gray of the University of Maryland, and Annie Knickman and Dan Wegner of Harvard University, conducted an experiment designed to ascertain just how people perceive those in a persistent vegetative state.