De somno et vigilia theses ad disputandum propositae

when internal inflammations are generated, or external ones occur, waking is pernicious, sleep not at all.

LXV.

Thus they effect various alterations of the body, as they find this or that matter, and change the same in diverse ways. For sleep, for example, by digesting raw humors and turning them into blood, also heats if inflammation is present in the viscera: it cools when it alters, segregates, and extinguishes the febrile heat of the humors that initiate a fever: finally, it dries when humor is lacking within, or little is present, which the heat immediately consumes.

LXVI.

Finally, pains of the head in cephalæa severe headache and hemicrania migraine, and in other such diseases, as well as heaviness of the head and drunkenness are cured or eased by the benefit of sleep, namely by the digestion and dispersion of humors and vapors collected in the head.