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Computational Models of Inferior Colliculus Neurons

  • Kevin A. Davis
  • Kenneth E. Hancock
  • Bertrand Delgutte
Chapter
Part of the Springer Handbook of Auditory Research book series (SHAR, volume 35)

Abstract

The inferior colliculus (IC), the principal auditory nucleus in the midbrain, occupies a key position in the auditory system. It receives convergent input from most of the auditory nuclei in the brain stem, and in turn, projects to the auditory forebrain (Winer and Schreiner 2005). The IC is therefore a major site for the integration and reorganization of the different types of auditory information conveyed by largely parallel neural pathways in the brain stem, and its neural response properties are accordingly very diverse and complex (Winer and Schreiner 2005). The function of the IC has been hard to pinpoint. The IC has been called the “nexus of the auditory pathway” (Aitkin 1986), a “shunting yard of acoustical information processing” (Ehret and Romand 1997), and the locus of a “transformation [that] adjusts the pace of sensory input to the pace of behavior” (Casseday and Covey 1996). The vague, if not metaphorical, nature of these descriptions partly reflects the lack of a quantitative understanding of IC processing such as that which has emerged from computational studies of the cochlear nucleus (Voigt, Chapter 3) and superior olivary complex (Colburn, Chapter 4).

Keywords

Inferior Colliculus Interaural Time Difference Good Frequency Dorsal Cochlear Nucleus Interaural Level Difference 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Abbreviations

AM

Amplitude modulation

AN

Auditory nerve

BD

Best delay

BMF

Best modulation frequency

BF

Best frequency

CD

Characteristic delay

CN

Cochlear nucleus

CP

Characteristic phase

CR

Chopping rate

DCN

Dorsal cochlear nucleus

DNLL

Dorsal nucleus of the lateral lemniscus

EI

Contralaterally excited and ipsilaterally inhibited

EI/F

EI with facilitation

F0

Fundamental frequency

IC

Inferior colliculus

ICC

Central nucleus of the inferior colliculus

ICX

External nucleus of the inferior colliculus

ILD

Interaural level difference

IPD

Interaural phase difference

ITD

Interaural time difference

LSO

Lateral superior olive

MNTB

Medial nucleus of the trapezoid body

MSO

Medial superior olive

MTF

Modulation transfer function

PE

Precedence effect

PIR

Postinhibitory rebound

SOC

Superior olivary complex

VNLL

Ventral nucleus of the lateral lemniscus

VCN

Ventral cochlear nucleus

Notes

Acknowledgment

We thank M. Slama, G.I. Wang, L. Wang, B. Wen, and Y Zhou for their comments on the manuscript, and G.I. Wang for help with figure preparation. Preparation of this chapter was supported by NIH grants DC002258 (Delgutte and Hancock) and DC05161 (Davis).

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Copyright information

© Springer-Verlag US 2010

Authors and Affiliations

  • Kevin A. Davis
    • 1
  • Kenneth E. Hancock
  • Bertrand Delgutte
  1. 1.Departments of Biomedical Engineering and Neurobiology and AnatomyUniversity of RochesterRochesterUSA

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