The following is an excerpt....
BASICS
Description
- Dysfunction in either the reticular activating system in the upper brainstem or a large area of one or both cerebral hemispheres
- Definitions:
- Confusion: A behavioral state of reduced mental clarity, coherence, comprehension, and reasoning
- Drowsiness: The patient cannot be easily aroused by touch or noise and cannot maintain alertness for some time.
- Lethargy: Depressed mental status in which the patient may appear wakeful but has depressed awareness of self and environment globally; cannot be aroused to full function
- Stupor: The patient can be awakened only by vigorous stimuli, and an effort to avoid uncomfortable or aggravating stimulation is displayed.
- Coma: The patient cannot be aroused by stimulation and no purposeful attempt is made to avoid painful stimuli.
- Delirium ...
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