Catatonus

The catatonus of the patient is sometimes remarkably demonstrable in the expression of the symptom known as waxy flexibility (cerea flexibilitas).

The older literature is full of vivid accounts of feverish somnolent illnesses followed, within months or years, by the development of characteristic slowness, poverty, and difficulty of movement, masking, rigidity, tremors, and, on occasion, torticollis, dystonias, oculogyria, strabismus, blepharoclonus, myoclonus, catatonus, somnolence, etc., etc.