1
40
5
-
Text
A resource consisting primarily of words for reading. Examples include books, letters, dissertations, poems, newspapers, articles, archives of mailing lists. Note that facsimiles or images of texts are still of the genre Text.
URL Address
<a href="http://doi.org/10.3389/fncir.2012.00075" target="_blank" rel="noreferrer noopener">http://doi.org/10.3389/fncir.2012.00075</a>
Pages
75–75
Volume
6
Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
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Mechanisms of spectral and temporal integration in the mustached bat inferior colliculus.
Publisher
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Frontiers in neural circuits
Date
A point or period of time associated with an event in the lifecycle of the resource
2012
1905-07
Subject
The topic of the resource
lateral lemniscus; biosonar; combination sensitivity; combination-sensitive; echolocation; facilitation; glycinergic; medial nucleus of trapezoid body
Creator
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Wenstrup Jeffrey James; Nataraj Kiran; Sanchez Jason Tait
Description
An account of the resource
This review describes mechanisms and circuitry underlying combination-sensitive response properties in the auditory brainstem and midbrain. Combination-sensitive neurons, performing a type of auditory spectro-temporal integration, respond to specific, properly timed combinations of spectral elements in vocal signals and other acoustic stimuli. While these neurons are known to occur in the auditory forebrain of many vertebrate species, the work described here establishes their origin in the auditory brainstem and midbrain. Focusing on the mustached bat, we review several major findings: (1) Combination-sensitive responses involve facilitatory interactions, inhibitory interactions, or both when activated by distinct spectral elements in complex sounds. (2) Combination-sensitive responses are created in distinct stages: inhibition arises mainly in lateral lemniscal nuclei of the auditory brainstem, while facilitation arises in the inferior colliculus (IC) of the midbrain. (3) Spectral integration underlying combination-sensitive responses requires a low-frequency input tuned well below a neuron's characteristic frequency (ChF). Low-ChF neurons in the auditory brainstem project to high-ChF regions in brainstem or IC to create combination sensitivity. (4) At their sites of origin, both facilitatory and inhibitory combination-sensitive interactions depend on glycinergic inputs and are eliminated by glycine receptor blockade. Surprisingly, facilitatory interactions in IC depend almost exclusively on glycinergic inputs and are largely independent of glutamatergic and GABAergic inputs. (5) The medial nucleus of the trapezoid body (MNTB), the lateral lemniscal nuclei, and the IC play critical roles in creating combination-sensitive responses. We propose that these mechanisms, based on work in the mustached bat, apply to a broad range of mammals and other vertebrates that depend on temporally sensitive integration of information across the audible spectrum.
Identifier
An unambiguous reference to the resource within a given context
<a href="http://doi.org/10.3389/fncir.2012.00075" target="_blank" rel="noreferrer noopener">10.3389/fncir.2012.00075</a>
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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).
2012
biosonar
College of Anatomy & Neurobiology
combination sensitivity
combination-sensitive
Department of Anatomy & Neurobiology
Echolocation
facilitation
Frontiers in neural circuits
glycinergic
lateral lemniscus
medial nucleus of trapezoid body
Nataraj Kiran
NEOMED College of Medicine
Sanchez Jason Tait
Wenstrup Jeffrey James
-
Text
A resource consisting primarily of words for reading. Examples include books, letters, dissertations, poems, newspapers, articles, archives of mailing lists. Note that facsimiles or images of texts are still of the genre Text.
URL Address
<a href="http://doi.org/10.1152/jn.01152.2004" target="_blank" rel="noreferrer noopener">http://doi.org/10.1152/jn.01152.2004</a>
Pages
3294–3312
Issue
6
Volume
93
Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
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Roles of inhibition in creating complex auditory responses in the inferior colliculus: facilitated combination-sensitive neurons.
Publisher
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Journal of neurophysiology
Date
A point or period of time associated with an event in the lifecycle of the resource
2005
2005-06
Subject
The topic of the resource
Acoustic Stimulation/methods; Action Potentials/*physiology; Animals; Auditory Pathways/physiology; Bicuculline/pharmacology; Cell Count; Drug Interactions; GABA Antagonists/pharmacology; Glycine Agents/pharmacology; Inferior Colliculi/*cytology; Iontophoresis/methods; Models; Neural Inhibition/drug effects/*physiology; Neurological; Neurons/classification/drug effects/*physiology/radiation effects; Otters; Reaction Time/*physiology/radiation effects; Regression Analysis; Strychnine/pharmacology; Time Factors; Wakefulness/physiology
Creator
An entity primarily responsible for making the resource
Nataraj Kiran; Wenstrup Jeffrey J
Description
An account of the resource
We studied roles of inhibition on temporally sensitive facilitation in combination-sensitive neurons from the mustached bat's inferior colliculus (IC). In these integrative neurons, excitatory responses to best frequency (BF) tones are enhanced by much lower frequency signals presented in a specific temporal relationship. Most facilitated neurons (76%) showed inhibition at delays earlier than or later than the delays causing facilitation. The timing of inhibition at earlier delays was closely related to the best delay of facilitation, but the inhibition had little influence on the duration or strength of the facilitatory interaction. Local iontophoretic application of antagonists to receptors for glycine (strychnine, STRY) and gamma-aminobutyric acid (GABA) (bicuculline, BIC) showed that STRY abolished facilitation in 96% of tested units, but BIC eliminated facilitation in only 28%. This suggests that facilitatory interactions are created in IC and reveals a differential role for these neurotransmitters. The facilitation may be created by coincidence of a postinhibitory rebound excitation activated by the low-frequency signal with the BF-evoked excitation. Unlike facilitation, inhibition at earlier delays was not eliminated by application of antagonists, suggesting an origin in lower brain stem nuclei. However, inhibition at delays later than facilitation, like facilitation itself, appears to originate within IC and to be more dependent on glycinergic than GABAergic mechanisms. Facilitatory and inhibitory interactions displayed by these combination-sensitive neurons encode information within sonar echoes and social vocalizations. The results indicate that these complex response properties arise through a series of neural interactions in the auditory brain stem and midbrain.
Identifier
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<a href="http://doi.org/10.1152/jn.01152.2004" target="_blank" rel="noreferrer noopener">10.1152/jn.01152.2004</a>
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Information about rights held in and over the resource
Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).
2005
Acoustic Stimulation/methods
Action Potentials/*physiology
Animals
Auditory Pathways/physiology
Bicuculline/pharmacology
Cell Count
College of Anatomy & Neurobiology
Department of Anatomy & Neurobiology
Drug Interactions
GABA Antagonists/pharmacology
Glycine Agents/pharmacology
Inferior Colliculi/*cytology
Iontophoresis/methods
Journal of neurophysiology
Models
Nataraj Kiran
NEOMED College of Medicine
Neural Inhibition/drug effects/*physiology
Neurological
Neurons/classification/drug effects/*physiology/radiation effects
Otters
Reaction Time/*physiology/radiation effects
Regression Analysis
Strychnine/pharmacology
Time Factors
Wakefulness/physiology
Wenstrup Jeffrey J
-
Text
A resource consisting primarily of words for reading. Examples include books, letters, dissertations, poems, newspapers, articles, archives of mailing lists. Note that facsimiles or images of texts are still of the genre Text.
URL Address
<a href="http://doi.org/10.1152/jn.01148.2005" target="_blank" rel="noreferrer noopener">http://doi.org/10.1152/jn.01148.2005</a>
Pages
2179–2192
Issue
4
Volume
95
Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
A name given to the resource
Roles of inhibition in complex auditory responses in the inferior colliculus: inhibited combination-sensitive neurons.
Publisher
An entity responsible for making the resource available
Journal of neurophysiology
Date
A point or period of time associated with an event in the lifecycle of the resource
2006
2006-04
Subject
The topic of the resource
Acoustic Stimulation; Action Potentials/drug effects/physiology; Afferent/drug effects/*physiology; Animals; Auditory; Auditory Pathways/drug effects/*physiology; Bicuculline/pharmacology; Brain Stem/drug effects/*physiology; Chiroptera; Electrophysiology; Evoked Potentials; GABA-A Receptor Antagonists; GABA-A/physiology; Glycine/antagonists & inhibitors/physiology; Inferior Colliculi/*physiology; Neural Inhibition/drug effects/*physiology; Neurons; Receptors; Strychnine/pharmacology
Creator
An entity primarily responsible for making the resource
Nataraj Kiran; Wenstrup Jeffrey J
Description
An account of the resource
We studied the functional properties and underlying neural mechanisms associated with inhibitory combination-sensitive neurons in the mustached bat's inferior colliculus (IC). In these neurons, the excitatory response to best frequency tones was suppressed by lower frequency signals (usually in the range of 12-30 kHz) in a time-dependant manner. Of 143 inhibitory units, the majority (71%) were type I, in which low-frequency sounds evoked inhibition only. In the remainder, however, the low-frequency inhibitory signal also evoked excitation. Of these, excitation preceded the inhibition in type E/I units (16%), whereas in type I/E units (13%), excitation followed the inhibition. Type E/I and I/E units were distinct in the tuning and threshold sensitivity of low-frequency responses, whereas type I units overlapped the other types in these features. In 71 neurons, antagonists to receptors for glycine [strychnine (STRY)] or GABA [bicuculline (BIC)] were applied microiontophoretically. These antagonists failed to eliminate combination-sensitive inhibition in 92% (STRY), 93% (BIC), and 87% (BIC + STRY) of the type I units tested. However, inhibition was reduced in many neurons. Results were similar for type E/I and I/E inhibitory neurons. The results indicate that there are distinct populations of combination-sensitive inhibited neurons in the IC and that these populations are at least partly independent of glycine or GABAA receptors in the IC. We propose that these populations originate in different brain stem auditory nuclei, that they may be modified by interactions within the IC, and that they may perform different spectrotemporal analyses of vocal signals.
Identifier
An unambiguous reference to the resource within a given context
<a href="http://doi.org/10.1152/jn.01148.2005" target="_blank" rel="noreferrer noopener">10.1152/jn.01148.2005</a>
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Information about rights held in and over the resource
Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).
2006
Acoustic Stimulation
Action Potentials/drug effects/physiology
Afferent/drug effects/*physiology
Animals
Auditory
Auditory Pathways/drug effects/*physiology
Bicuculline/pharmacology
Brain Stem/drug effects/*physiology
Chiroptera
College of Anatomy & Neurobiology
Department of Anatomy & Neurobiology
Electrophysiology
Evoked Potentials
GABA-A Receptor Antagonists
GABA-A/physiology
Glycine/antagonists & inhibitors/physiology
Inferior Colliculi/*physiology
Journal of neurophysiology
Nataraj Kiran
NEOMED College of Medicine
Neural Inhibition/drug effects/*physiology
Neurons
Receptors
Strychnine/pharmacology
Wenstrup Jeffrey J
-
Text
A resource consisting primarily of words for reading. Examples include books, letters, dissertations, poems, newspapers, articles, archives of mailing lists. Note that facsimiles or images of texts are still of the genre Text.
URL Address
<a href="http://doi.org/10.1152/jn.00634.2005" target="_blank" rel="noreferrer noopener">http://doi.org/10.1152/jn.00634.2005</a>
Pages
88–105
Issue
1
Volume
95
Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
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Auditory responses in the cochlear nucleus of awake mustached bats: precursors to spectral integration in the auditory midbrain.
Publisher
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Journal of neurophysiology
Date
A point or period of time associated with an event in the lifecycle of the resource
2006
2006-01
Subject
The topic of the resource
Acoustic Stimulation/methods; Action Potentials/*physiology; Animals; Auditory; Brain Mapping; Brain Stem/*physiology; Chiroptera/*physiology; Cochlear Nucleus/*physiology; Evoked Potentials; Mesencephalon/physiology; Nerve Net/*physiology; Pitch Perception/*physiology; Wakefulness/physiology
Creator
An entity primarily responsible for making the resource
Marsh Robert A; Nataraj Kiran; Gans Donald; Portfors Christine V; Wenstrup Jeffrey J
Description
An account of the resource
In the cochlear nucleus (CN) of awake mustached bats, single- and two-tone stimuli were used to examine how responses in major CN subdivisions contribute to spectrotemporal integrative features in the inferior colliculus (IC). Across CN subdivisions, the proportional representation of frequencies differed. A striking result was the substantial number of units tuned to frequencies \textless23 kHz. Across frequency bands, temporal response patterns, latency, and spontaneous discharge differed. For example, the 23- to 30-kHz representation, which comprises the fundamental of the sonar call, had an unusually high proportion of units with onset responses (39%) and low spontaneous rates (53%). Units tuned to 58-59 kHz, corresponding to the sharply tuned cochlear resonance, had slightly but significantly longer latencies than other bands. In units tuned to frequencies \textgreater30 kHz, 31% displayed a secondary excitatory peak, usually between 10 and 22 kHz. The secondary peak may originate in cochlear mechanisms for some units, but in others it may result from convergent input onto CN neurons. In 20% of units tested with two-tone stimuli, suppression of best frequency (BF) responses was tuned at least an octave below BF. These properties may underlie similar IC responses. However, other forms of spectral interaction present in IC were absent in CN: we found no facilitatory combination-sensitive interactions and very few combination-sensitive inhibitory interactions of the dominant IC type in which inhibition was tuned to 23-30 kHz. Such interactions arise above CN. Distinct forms of spectral integration thus originate at different levels of the ascending auditory pathway.
Identifier
An unambiguous reference to the resource within a given context
<a href="http://doi.org/10.1152/jn.00634.2005" target="_blank" rel="noreferrer noopener">10.1152/jn.00634.2005</a>
Rights
Information about rights held in and over the resource
Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).
2006
Acoustic Stimulation/methods
Action Potentials/*physiology
Animals
Auditory
Brain Mapping
Brain Stem/*physiology
Chiroptera/*physiology
Cochlear Nucleus/*physiology
College of Anatomy & Neurobiology
Department of Anatomy & Neurobiology
Evoked Potentials
Gans Donald
Journal of neurophysiology
Marsh Robert A
Mesencephalon/physiology
Nataraj Kiran
NEOMED College of Medicine
Nerve Net/*physiology
Pitch Perception/*physiology
Portfors Christine V
Wakefulness/physiology
Wenstrup Jeffrey J
-
Text
A resource consisting primarily of words for reading. Examples include books, letters, dissertations, poems, newspapers, articles, archives of mailing lists. Note that facsimiles or images of texts are still of the genre Text.
URL Address
<a href="http://doi.org/10.1152/jn.00040.2009" target="_blank" rel="noreferrer noopener">http://doi.org/10.1152/jn.00040.2009</a>
Pages
1004–1016
Issue
2
Volume
102
Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
A name given to the resource
Glycinergic inhibition creates a form of auditory spectral integration in nuclei of the lateral lemniscus.
Publisher
An entity responsible for making the resource available
Journal of neurophysiology
Date
A point or period of time associated with an event in the lifecycle of the resource
2009
2009-08
Subject
The topic of the resource
Acoustic Stimulation; Action Potentials/drug effects; Animals; Auditory Perception/drug effects/*physiology; Bicuculline/pharmacology; Brain Stem/drug effects/*physiology; Chiroptera; GABA Antagonists/pharmacology; GABA-A Receptor Antagonists; GABA-A/metabolism; gamma-Aminobutyric Acid/metabolism; Glycine Agents/pharmacology; Glycine/*physiology; Glycine/antagonists & inhibitors/metabolism; Microelectrodes; Neural Inhibition/drug effects/*physiology; Neurons/drug effects/*physiology; Receptors; Strychnine/pharmacology
Creator
An entity primarily responsible for making the resource
Peterson Diana Coomes; Nataraj Kiran; Wenstrup Jeffrey
Description
An account of the resource
For analyses of complex sounds, many neurons integrate information across different spectral elements via suppressive effects that are distant from the neurons' excitatory tuning. In the mustached bat, suppression evoked by sounds within the first sonar harmonic (23-30 kHz) or in the subsonar band (\textless23 kHz) alters responsiveness to the higher best frequencies of many neurons. This study examined features and mechanisms associated with low-frequency (LF) suppression among neurons of the lateral lemniscal nuclei (NLL). We obtained extracellular recordings from neurons in the intermediate and ventral nuclei of the lateral lemniscus, observing different forms of LF suppression related to the two above-cited frequency bands. To understand the mechanisms underlying this suppression in NLL neurons, we examined the roles of glycinergic and GABAergic input through local microiontophoretic application of strychnine, an antagonist to glycine receptors (GlyRs), or bicuculline, an antagonist to gamma-aminobutyric acid type A receptors (GABA(A)Rs). With blockade of GABA(A)Rs, neurons showed an increase in firing rate to best frequency (BF) and/or LF tones but retained LF suppression of BF sounds. For neurons that displayed LF suppression tuned to
Identifier
An unambiguous reference to the resource within a given context
<a href="http://doi.org/10.1152/jn.00040.2009" target="_blank" rel="noreferrer noopener">10.1152/jn.00040.2009</a>
Rights
Information about rights held in and over the resource
Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).
2009
Acoustic Stimulation
Action Potentials/drug effects
Animals
Auditory Perception/drug effects/*physiology
Bicuculline/pharmacology
Brain Stem/drug effects/*physiology
Chiroptera
College of Anatomy & Neurobiology
Department of Anatomy & Neurobiology
GABA Antagonists/pharmacology
GABA-A Receptor Antagonists
GABA-A/metabolism
gamma-Aminobutyric Acid/metabolism
Glycine Agents/pharmacology
Glycine/*physiology
Glycine/antagonists & inhibitors/metabolism
Journal of neurophysiology
Microelectrodes
Nataraj Kiran
NEOMED College of Medicine
Neural Inhibition/drug effects/*physiology
Neurons/drug effects/*physiology
Peterson Diana Coomes
Receptors
Strychnine/pharmacology
Wenstrup Jeffrey