Concentrated pitch discrimination modulates auditory brainstem responses during contralateral noise exposure.
This study examined a notion that auditory discrimination is a requisite for attention-related modulation of the auditory brainstem response (ABR) during contralateral noise exposure. Given that the right ear was exposed continuously with white noise at an intensity of 60-80 dB sound pressure level, tone pips at 80 dB sound pressure level were delivered to the left ear through either single-stimulus or oddball procedures. Participants conducted reading (ignoring task) and counting target tones (attentive task) during stimulation. The oddball but not the single-stimulus procedures elicited task-related modulations in both early (ABR) and late (processing negativity) event-related potentials simultaneously. The elicitation of the attention-related ABR modulation during contralateral noise exposure is thus considered to require auditory discrimination and have the corticofugal nature evidently.
Ikeda
Kazunari
K
Laboratory of Cognitive Psychophysiology, Center for the Research and Support of Educational Practice, Tokyo Gakugei University, Tokyo, Japan. kazunari@u-gakugei.ac.jp
Sekiguchi
Takahiro
T
Hayashi
Akiko
A
D000161:Acoustic Stimulation; D001933:Brain Stem / Q000502:physiology*; D016057:Evoked Potentials, Auditory, Brain Stem; D005260:Female; D007839:Functional Laterality; D006801:Humans; D008297:Male; D009483:Neuropsychological Tests; D009622:Noise; D010897:Pitch Discrimination / Q000502:physiology*; D013997:Time Factors; D055815:Young Adult