Decreased alertness is a state of reduced awareness.
A coma is a state of decreased alertness from which a patient cannot be awakened. A long-term coma is called a vegetative state.
See also:
Stuporous; Mental status - decreased; Loss of alertness; Decreased consciousness; Changes in consciousness; Obtundation; Coma; Unresponsiveness
Many conditions can cause decreased alertness, including:
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Source: ADAM Encyclopedia
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