To perform the caloric test the investigators used an air otocalorimeter, and carried out four stimulations of 60 seconds each, with a flow of 8 liters per minute: 50C in the right ear, 50C on the left, 24C on the left ear and 24C in the right ear, in this order. The absolute values and percentages of unilateral weakness or directional preponderance were analyzed for each subject in each test. The subjects were considered normal when they showed absolute values from 3 to 45, a range of 30% or less in directional preponderance and of less than 25% in the unilateral weakness.