4 Levels of Unconsciousness?

Question

Im studying radiology and working on my homework, the questions is what are the 4 levels of unconsciousness and why is it important to interact effectively with patients that may be in an altered state of consciousness, well i know the answer to the second part but i still cant seem to find the 4 levels of unconsciousness and i have read the whole chapter

Answer 1

Unconscious, in psychology, hypothetical region of the mind containing wishes, memories, fears, feelings, and ideas that are prevented from expression in conscious awareness. They manifest themselves, instead, by their influence on conscious processes and, most strikingly, by such anomalous phenomena as dreams and neurotic symptoms (see Psychoanalysis). Not all mental activity of which the subject is unaware belongs to the unconscious; for example, thoughts that may be made conscious by a new focusing of attention are termed foreconscious or preconscious.

The concept of the unconscious was first developed in the period from 1895 to 1900 by Sigmund Freud, who theorized that it consists of survivals of feelings experienced during infantile life, including both instinctual drives or libido and their modifications by the development of the superego. According to the Swiss psychoanalyst Carl Jung, the unconscious also consists of a racial unconscious that contains certain inherited, universal, archaic fantasies belonging to what Jung termed the collective unconscious.

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