Sudden onset of vertigo, gradually becoming paroxysmal, usually in association with asthenic symptoms. Head movements enhance the symptoms. Signs: fever, gait and stance disturbed. Absent response to caloric stimulation on one side, nystagmus with quick component to the opposite side. Normal hearing; occasionally response positive on both sides. The disease occurs in conjunction with encephalitis. Occurs in two forms, ons is characterized by gastrointestinal complications, the other by upper respiratory tract infection.
- E. Pedersen:
Epidemic vertigo: clinical picture, epidemiology and relation to encephalitis.
Brain, Oxford, December 1959, 82: 566-580.
- M. R. Dix, C. S. Hallpike:
The pathology, symptomatology and diagnosis of certain common disorders of vestibular system.
Proceedings of the Royal Society of Medicine, London, 1962; 45: 341-347.