Acoustic Change Complex: Clinical Implications

摘要: The acoustic change complex (ACC) is a cortical auditory evoked potential elicited in response to an ongoing sound. characteristics and clinical implications of the ACC are reviewed this article. P1-N1-P2 recorded from cortex following presentation stimulus believed reflect neural encoding sound signal, but provides no information regarding discrimination. However, processing underlying behavioral discrimination capacity can be measured by modifying traditional methodology for recording P1-N1-P2. When obtained within sound, resulting waveform referred as ACC. elicited, indicates that brain has detected changes patient discriminate sounds. In fact, results several studies have shown amplitude increases with increasing magnitude intensity, spectrum, gap duration. addition, reliably good test-retest reliability not only listeners normal hearing also individuals loss, aids, cochlear implants. even absence attention, requires relatively few presentations record signal-to-noise ratio. Most importantly, shows reasonable agreement measures. Therefore, these findings suggest might represent promising tool objective evaluation and/or speech perception capacity.