Circuitry underlying spectrotemporal integration in the auditory midbrain.

Title

Circuitry underlying spectrotemporal integration in the auditory midbrain.

Creator

Yavuzoglu Asuman; Schofield Brett R; Wenstrup Jeffrey J

Publisher

The Journal of neuroscience : the official journal of the Society for Neuroscience

Date

2011
2011-10

Description

Combination sensitivity in central auditory neurons is a form of spectrotemporal integration in which excitatory responses to sounds at one frequency are facilitated by sounds within a distinctly different frequency band. Combination-sensitive neurons respond selectively to acoustic elements of sonar echoes or social vocalizations. In mustached bats, this response property originates in high-frequency representations of the inferior colliculus (IC) and depends on low and high frequency-tuned glycinergic inputs. To identify the source of these inputs, we combined glycine immunohistochemistry with retrograde tract tracing. Tracers were deposited at high-frequency (\textgreater56 kHz), combination-sensitive recording sites in IC. Most glycine-immunopositive, retrogradely labeled cells were in ipsilateral ventral and intermediate nuclei of the lateral lemniscus (VNLL and INLL), with some double labeling in ipsilateral lateral and medial superior olivary nuclei (LSO and MSO). Generally, double-labeled cells were in expected high-frequency tonotopic areas, but some VNLL and INLL labeling appeared to be in low-frequency representations. To test whether these nuclei provide low frequency-tuned input to the high-frequency IC, we combined retrograde tracing from IC combination-sensitive sites with anterograde tracing from low frequency-tuned sites in the anteroventral cochlear nucleus (AVCN). Only VNLL and INLL contained retrogradely labeled cells near (

Subject

Female; Male; Time Factors; Animals; Acoustic Stimulation/*methods; Chiroptera; Auditory Pathways/*physiology; Mesencephalon/*physiology; Nerve Net/*physiology

Rights

Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).

Pages

14424–14435

Issue

40

Volume

31

Citation

Yavuzoglu Asuman; Schofield Brett R; Wenstrup Jeffrey J, “Circuitry underlying spectrotemporal integration in the auditory midbrain.,” NEOMED Bibliography Database, accessed September 21, 2021, https://neomed.omeka.net/items/show/5003.

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