Consciousness assessment === * GCS and clues from behavior. **content** and **level** of consciousness (Plum and Posner 1982) * level: wakefulness * awake, aroused, alert, vigilant * clear, drowsy/lethargy, stupor, coma * GCS: Teasdale and Jennett 1974[^Teasdale1974] * content: awareness and attention * (perception) * AAA": **alertness**, **attention**, **awareness** (Blumenfeld 2002) * Figure: clinical spectrum of conscious level and content[^Laureys2005] ![](https://i.imgur.com/phpqdaZ.png) [^Teasdale1974]: Teasdale G et al. **Assessment of coma and impaired consciousness. A practical scale.** [Lancet. 1974;2:81](https://www.ncbi.nlm.nih.gov/pubmed/4136544) [^Laureys2005]: Encyclopedia of Neuroscience (2009), vol. 2, pp. 1133-1142; Laureys S. **The neural correlate of (un)awareness: Lessons from the vegetative state** [Trends Cogn Sci. 2005;9:556](https://www.ncbi.nlm.nih.gov/pubmed/16271507).