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Text
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URL Address
<a href="http://doi.org/10.1523/jneurosci.20-22-08533.2000" target="_blank" rel="noreferrer noopener">http://doi.org/10.1523/jneurosci.20-22-08533.2000</a>
Pages
8533–8541
Issue
22
Volume
20
Dublin Core
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Title
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Spectral integration in the inferior colliculus of the mustached bat.
Publisher
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The Journal of neuroscience : the official journal of the Society for Neuroscience
Date
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2000
2000-11
Subject
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Animals; Chiroptera/*physiology; Neurons/physiology; Acoustic Stimulation; Inferior Colliculi/*physiology; Action Potentials/physiology; Auditory Threshold/physiology; Brain Mapping; Reaction Time/physiology; Pitch Perception/*physiology; Auditory Pathways/physiology; Animal Communication; Sound Spectrography; Stereotaxic Techniques; Electrodes; Animal/physiology; Vocalization; Implanted
Creator
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Leroy S A; Wenstrup J J
Description
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Acoustic behaviors including orientation and social communication depend on neural integration of information across the sound spectrum. In many species, spectral integration is performed by combination-sensitive neurons, responding best when distinct spectral elements in sounds are combined. These are generally considered a feature of information processing in the auditory forebrain. In the mustached bat's inferior colliculus (IC), they are common in frequency representations associated with sonar signals but have not been reported elsewhere in this bat's IC or the IC of other species. We examined the presence of combination-sensitive neurons in frequency representations of the mustached bat's IC not associated with biosonar. Seventy-five single-unit responses were recorded with the best frequencies in 10-23 or 32-47 kHz bands. Twenty-six displayed single excitatory tuning curves in one band with no additional responsiveness to a second signal in another band. The remaining 49 responded to sounds in both 10-23 and 32-47 kHz bands, but response types varied. Sounds in the higher band were usually excitatory, whereas sounds in the lower band either facilitated or inhibited responses to the higher frequency signal. Interactions were usually strongest when the higher and lower frequency stimuli were presented simultaneously, but the strength of interactions varied. Over one-third of the neurons formed a distinct subset; they responded most sensitively to bandpass noise, and all were combination sensitive. We suggest that these combination-sensitive interactions are activated by elements of mustached bat social vocalizations. If so, neuronal integration characterizing analysis of social vocalizations in many species occurs in the IC.
Identifier
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<a href="http://doi.org/10.1523/jneurosci.20-22-08533.2000" target="_blank" rel="noreferrer noopener">10.1523/jneurosci.20-22-08533.2000</a>
Rights
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Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).
2000
Acoustic Stimulation
Action Potentials/physiology
Animal Communication
Animal/physiology
Animals
Auditory Pathways/physiology
Auditory Threshold/physiology
Brain Mapping
Chiroptera/*physiology
College of Anatomy & Neurobiology
Department of Anatomy & Neurobiology
Electrodes
Implanted
Inferior Colliculi/*physiology
Leroy S A
NEOMED College of Medicine
Neurons/physiology
Pitch Perception/*physiology
Reaction Time/physiology
Sound Spectrography
Stereotaxic Techniques
The Journal of neuroscience : the official journal of the Society for Neuroscience
Vocalization
Wenstrup J J