‘Thoughts are the shadows of our feelings—always darker, emptier and simpler.’ —Nietzsche

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At one end is our everyday consciousness, and at the other is total unconsciousness, as represented by coma. Actually, the term “coma” covers two very similar states: One is the kind of coma that results from a severe head injury or cardiac arrest, and the other is the state induced in a hospital setting by means of general anesthesia.

So anyone who has had general anesthesia has been in a coma?

Yes, general anesthesia is nearly identical to what we might call “natural” coma.

{ American Scientist | Continue reading }