The contribution of inferior colliculus activity to the auditory brainstem response (ABR) in mice

Rüdiger Land*, Alice Burghard, Andrej Kral

*Corresponding author for this work

Research output: Contribution to journalArticle

16 Citations (Scopus)
97 Downloads (Pure)

Abstract

In mice, the auditory brainstem response (ABR) is frequently used to assess hearing status in transgenic hearing models. The diagnostic value of the ABR depends on knowledge about the anatomical sources of its characteristic waves. Here, we studied the contribution of the inferior colliculus (IC) to the click-evoked scalp ABR in mice. We demonstrate a non-invasive correlate of the IC response that can be measured in the scalp ABR as a slow positive wave P0 with peak latency 7–8 ms when recorded with adequate band-pass filtering. Wave P0 showed close correspondence in latency, magnitude and shape with the sustained part of evoked spiking activity and local field potentials (LFP) in the central nucleus of the IC. In addition, the onset peaks of the IC response were related temporally to ABR wave V and to some extent to wave IV. This relation was further supported by depth-dependent modulation of the shape of ABR wave IV and V within the IC suggesting generation within or in close vicinity to the IC. In conclusion, the slow ABR wave P0 in the scalp ABR may represent a complementary non-invasive marker for IC activity in the mouse. Further, the latency of synchronized click-evoked activity in the IC supports the view that IC contributes to ABR wave V, and possibly also to ABR wave IV.

Original languageEnglish
Pages (from-to)109-118
Number of pages10
JournalHearing Research
Volume341
DOIs
Publication statusPublished - 1 Nov 2016
Externally publishedYes

Bibliographical note

Copyright the Author(s) 2016. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

Keywords

  • ABR
  • Auditory brainstem response
  • IC
  • Inferior colliculus
  • Middle latency response
  • MLR
  • Phenotyping

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