Effects of Stimulus Duration on Event-Related Potentials Recorded From Cochlear-Implant Users
Alessandro Presacco, Hamish Innes-Brown, Matthew J Goupell, Samira Anderson
EAR AND HEARING | LIPPINCOTT WILLIAMS & WILKINS | Published : 2017
OBJECTIVES: Several studies have investigated the feasibility of using electrophysiology as an objective tool to efficiently map cochlear implants. A pervasive problem when measuring event-related potentials is the need to remove the direct-current (DC) artifact produced by the cochlear implant. Here, we describe how DC artifact removal can corrupt the response waveform and how the appropriate choice of stimulus duration may minimize this corruption. DESIGN: Event-related potentials were recorded to a synthesized vowel /a/ with a 170- or 400-ms duration. RESULTS: The P2 response, which occurs between 150 and 250 ms, was corrupted by the DC artifact removal algorithm for a 170-ms stimulus dur..View full abstract
Awarded by NIH
Awarded by NATIONAL INSTITUTE ON AGING
Awarded by NATIONAL INSTITUTE ON DEAFNESS AND OTHER COMMUNICATION DISORDERS
We thank Blake Johnson, David Meng, Joann Tang, Colette McKay, and Aline Gesualdi Manhaes for their helpful comments on the data analysis and Maureen Shader for her help in collecting data. We also thank Advanced Bionics and Cochlear Ltd. for the equipment to perform this study and technical support. This work was supported by NIH Grant R01-AG051603 (M.J.G.), T32-DC000046 (Center of Comparative Evolutionary Biology of Hearing training grant award to A.P.), the International Graduate research fellowship awarded by the University of Maryland (A.P.), a seed grant from the College of Behavioral and Social Sciences at University of Maryland-College Park (Dean's Research Initiative, M.J.G.), and a seed grant from the Brain and Behavior Initiative (BBI) at the University of Maryland-College Park (M.J.G. and S.A.). HIB was supported by an Australian National Health and Medical Research Council Peter Doherty Fellowship. The Bionics Institute acknowledges the support it receives from the Victorian Government through its Operational Infrastructure Support Program.