Differentiate sedation, tranquilization, hypnosis, and narcosis.
Sedation refers to a state of relaxed consciousness where the patient can respond to stimuli but is less aware of their surroundings (e.g., for minor dental procedures). Tranquilization induces a state of calmness or reduced anxiety without necessarily causing sleep (e.g., for managing anxiety before medical procedures). Hypnosis is an altered state of consciousness characterized by heightened suggestibility and deep relaxation (e.g., for behavioral therapy). Narcosis is a state of unconsciousness or stupor induced by drugs (e.g., for major surgeries or intensive medical procedures).