VEMP was performed in response to air-conducted stimuli, using alternate 500Hz (Hertz) tone bursts presented at 120 dB (decibel) and rate of 5.1 stimuli per second. Bandpass filter of 10 Hz to 1500 Hz was used, 50ms window and 200 stimulations in each track were standard. Two stimulations were recorded on each side, in order to observe the replicability. The stimuli were presented via insert earphones. A cleaning of the skin with abrasive paste was performed and surface electrodes were affixed using conductive paste. The non inverting electrode was placed in the middle part of the sternocleidomastoid, the ground electrode in lower forehead and the inverting on the upper forehead. The impedance of the electrodes should be less than or equal to 5hms. Subjects were positioned seated and instructed to maintain maximum head turn to the side contralateral to the stimulus throughout stimulation.The latency of P1 and N1 and the P1N1 amplitude were analyzed in each ear and an asymmetry rate was also analyzed. For the last one was used the formula: ǀ amplitude of right ear ǀ - ǀ amplitude of left ear ǀ / ǀ amplitude of right ear ǀ + ǀ amplitude of left ear ǀ x 100. To compare the amplitudes in each ear before and after tests was used the rate of change formula, consisting of: ǀ amplitude of ear before ǀ - ǀ amplitude of ear after ǀ / ǀ amplitude of ear before ǀ + ǀ amplitude of ear after ǀ x 100. The investigators considered normal p13 latencies between 13.9 to 19.2 and from 22.9 to 30.3 n23 and the asymmetry rate and rate of change of up to 28%.