Protocol to collect late latency auditory evoked potentials.

UNLABELLED Long Latency Auditory Evoked Potentials (LLAEP) represents a number of electrical changes occurring in the central nervous system, resulting from stimulation of the auditory sensorial pathways. Many studies approach the use of these potentials controlling the artifact created by eye movement with the use of equipment with a large number of channels. However, what happens is very different in Brazilian clinical practice, where the equipment used has a very limited number of channels. AIM to compare the two methods used to control the artifacts created by eye movements during LLAEP capture using two recording channels. MATERIALS AND METHODS this is a prospective study with the application of two LLAEP capturing methods (eye artifact subtraction and rejection limit control) in 10 normal hearing individuals. RESULTS we did not observe statistically significant differences concerning the latency values obtained with the use of both methods, only concerning amplitude values. CONCLUSION both methods were efficient to capture the LLAEP and to control the eye movement artifact. The rejection limit control method produced greater amplitude values.