NDLI: The superior paraolivary nucleus shapes temporal response properties of neurons in the inferior colliculus

Content Provider	Springer Nature Link
Author	Felix, Richard A. Magnusson, Anna K. Berrebi, Albert S.
Copyright Year	2014
Abstract	The mammalian superior paraolivary nucleus (SPON) is a major source of GABAergic inhibition to neurons in the inferior colliculus (IC), a well-studied midbrain nucleus that is the site of convergence and integration for the majority ascending auditory pathways en route to the cortex. Neurons in the SPON and IC exhibit highly precise responses to temporal sound features, which are important perceptual cues for naturally occurring sounds. To determine how inhibitory input from the SPON contributes to the encoding of temporal information in the IC, a reversible inactivation procedure was conducted to silence SPON neurons, while recording responses to amplitude-modulated tones and silent gaps between tones in the IC. The results show that SPON-derived inhibition shapes responses of onset and sustained units in the IC via different mechanisms. Onset neurons appear to be driven primarily by excitatory inputs and their responses are shaped indirectly by SPON-derived inhibition, whereas sustained neurons are heavily influenced directly by transient offset inhibition from the SPON. The findings also demonstrate that a more complete dissection of temporal processing pathways is critical for understanding how biologically important sounds are encoded by the brain.
Starting Page	2639
Ending Page	2652
Page Count	14
File Format	PDF
ISSN	18632653
Journal	Anatomy and Embryology
Volume Number	220
Issue Number	5
e-ISSN	18632661
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2014-06-29
Publisher Place	Berlin/Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Amplitude modulation Gap detection Superior olive Sound envelopes Temporal processing Neurosciences Cell Biology Neurology
Content Type	Text
Resource Type	Article
Subject	Neuroscience Anatomy Histology

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