Neuro-otology is the only field of otolaryngology in which diagnoses are mainly deductive. Although many technological advances have indeed occurred, the patient history still remains the most important part of the evaluation of a patient complaining of vertigo and/or dizziness. The use of artificial intelligence methods as an aid for the solution of clinical problems is not new. "Carrusel" is a Prolog build-up expert system dealing with the diagnosis of vestibular disorders that achieves a success rate of 97% when compared to the human experts involved in its design.