# Stany świadomości

## Wprowadzenie

W naszym życiu regularnie i znacząco zmienia się stopień, w jakim jesteśmy świadomi otoczenia oraz własnych stanów wewnętrznych. Gdy nie śpimy, jesteśmy uważni oraz świadomi wielu rzeczy i sytuacji wokół nas. Nasze doświadczenia radykalnie się zmieniają, kiedy wchodzimy w głęboki sen, a następnie, kiedy śnimy.
W tym rozdziale zajmiemy się stanami świadomości ze szczególnym uwzględnieniem snu. Opiszemy kolejne jego fazy, a także zaburzenia. Na końcu omówimy odmienne stany świadomości powstające w wyniku używania substancji psychoaktywnych oraz zastosowania hipnozy i medytacji.

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