The Magnetic Acoustic Change Complex and Mismatch Field: A Comparison of Neurophysiological Measures of Auditory Discrimination

• DOI: 10.3934/neuroscience.2017.1.14
• Publication Date: 2017-02-23T02:58:35Z
• Authors: Shu Hui Yau; ; Fabrice Bardy; Paul F Sowman; Jon Brock
• Keywords: Stimulus (psychology); Magnetoencephalography; Neurophysiology; Psychoacoustics; Auditory System

The Acoustic Change Complex (ACC), a P1-N1-P2-like event-related response to changes in continuous sound, has been suggested as reliable, objective, and efficient test of auditory discrimination. We used magnetoencephalography compare the magnetic ACC (mACC) more widely mismatch field (MMF). Brain responses 14 adults were recorded during mACC MMF paradigms involving same pitch vowel synthetic sound. Analyses peak amplitudes revealed significant interaction between stimulus paradigm: for MMF, was greater than changes, whereas, mACC, pattern reversed. A similar observed signal noise ratio single-trial analysis individual participants’ showed that Pitch elicited less consistently other three responses. Results support view ACC/mACC is robust measure simple discrimination, particularly when researchers or clinicians are interested listeners. However, differential sensitivity two acoustic indicates indices different aspects processing should, therefore, be seen complementary rather competing neurophysiological measures.