ABSTRACT
Objective
To establish reference intervals for cognitive potential P300 latency using tone burst stimuli.
Methods
This study involved 28 participants aged between 18 and 59 years. P300 recordings were performed using a two-channel device (Masbe, Contronic). Electrode placement was as follows: Fpz (ground electrode), Cz (active electrode), M1 and M2 (reference electrodes). Intensity corresponded to 80 dB HL and frequent and rare stimulus frequencies to 1,000Hz and 2,000Hz, respectively. Stimuli were delivered binaurally.
Results
Mean age of participants was 35 years. Average P300 latency was 305ms.
Conclusion
Maximum acceptable P300 latency values of 362.5ms (305 + 2SD 28.75) were determined for adults aged 18 to 59 years using the protocol described.
Evoked potentials, auditory; Event-related potentials, P300; Adult