Preface; 1. Introduction: many definitions of consciousness; Part I. Delirium: 2. Definitions of relirium/wakeful impaired consciousness versus madness, and the concept of 'disease'; 3. Delirium versus madness and the notion of disease in the Hippocratic corpus; 4. Delirium, madness, and disease among post-Hellenistic authors; 5. Galen's delirium: hot and dry duscrasia of the hêgemonikon; 6. Final remarks about delirium and the notion of disease: a diachronic look; Part II.

Sleep: 7. A general glance at sleep; 8. Sleep in the Hippocratic corpus; 9. Sleep in post-Hellenistic sources; 10. Sleep in Galen; 11. Sleep and the mind: an overview of ideas that did not change; Part III. Fainting: 12. General overview of total loss of consciousness; 13.

The Hippocratic corpus and total loss of consciousness;14. Total loss of consciousness in post-Hellenistic authors; 15. Galen's two ways of losing consciousness; 16. Concluding reflections on the implication of the soul in total loss of consciousness; Conclusions; Transversal axis: what has the analysis of consciousness revealed about the sources?; Longitudinal thematic axis: advantages of exploring impaired consciousness; Bibliography; Primary sources, secondary sources.