gms | German Medical Science

Fourth International Symposium and Workshops: Objective Measures in Cochlear Implants

Medical University of Hannover

01.06. bis 04.06.2005, Hannover

Development of the neural Response Imaging over time in pre-lingually deaf children

Meeting Abstract

  • corresponding author V. Meyer - Cochlear Implant Center, Hannover, Germany
  • W. Kanert - Cochlear Implant Center, Hannover, Germany
  • S. Lewinski - Cochlear Implant Center, Hannover, Germany
  • C. Frohne-Büchner - Advanced Bionics GmbH, Hannover
  • R.D. Battmer - Medizinische Hochschule Hannover, Hannover
  • B. Bertram - Cochlear Implant Center, Hannover, Germany
  • T. Lenarz - Medizinische Hochschule Hannover, Hannover

Medical University of Hannover, Department of Otolaryngology. Fourth International Symposium and Workshops: Objective Measures in Cochlear Implants. Hannover, 01.-04.06.2005. Düsseldorf, Köln: German Medical Science; 2005. Doc05omci083

The electronic version of this article is the complete one and can be found online at:

Published: May 31, 2005

© 2005 Meyer et al.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License ( You are free: to Share – to copy, distribute and transmit the work, provided the original author and source are credited.



The Advanced Bionics Neural Response Imaging System (NRI) allows recordings of the auditory nerve activity to be made in response to an electrical stimulus via the cochlear implant. To permit the method to be used to monitor the integrity of the auditory nerve over time base line data on the influence of electrical stimulation on the developing auditory system of children is required. A study was initiated to collect NRI recordings in a group of ten pre-lingually deaf children implanted with a HiRes90K below the age of 4 years. The Advanced Bionics clinical fitting software Soundwave was used to measure NRI recordings on four channels during surgery, at initial fitting and 3, 6 and 12 months after first fitting. All children were fitted with HiRes while the clinician fitting the study subject was blind to the NRI results to avoid bias in fitting levels.  The NRI threshold was compared to the M-level used in the HiRes program. Changes in NRI success rate, threshold, shape and growth function were tracked.