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García-Rosales F, Schaworonkow N, Hechavarria JC. Oscillatory Waveform Shape and Temporal Spike Correlations Differ across Bat Frontal and Auditory Cortex. J Neurosci 2024; 44:e1236232023. [PMID: 38262724 PMCID: PMC10919256 DOI: 10.1523/jneurosci.1236-23.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 11/01/2023] [Accepted: 11/29/2023] [Indexed: 01/25/2024] Open
Abstract
Neural oscillations are associated with diverse computations in the mammalian brain. The waveform shape of oscillatory activity measured in the cortex relates to local physiology and can be informative about aberrant or dynamically changing states. However, how waveform shape differs across distant yet functionally and anatomically related cortical regions is largely unknown. In this study, we capitalize on simultaneous recordings of local field potentials (LFPs) in the auditory and frontal cortices of awake, male Carollia perspicillata bats to examine, on a cycle-by-cycle basis, waveform shape differences across cortical regions. We find that waveform shape differs markedly in the fronto-auditory circuit even for temporally correlated rhythmic activity in comparable frequency ranges (i.e., in the delta and gamma bands) during spontaneous activity. In addition, we report consistent differences between areas in the variability of waveform shape across individual cycles. A conceptual model predicts higher spike-spike and spike-LFP correlations in regions with more asymmetric shapes, a phenomenon that was observed in the data: spike-spike and spike-LFP correlations were higher in the frontal cortex. The model suggests a relationship between waveform shape differences and differences in spike correlations across cortical areas. Altogether, these results indicate that oscillatory activity in the frontal and auditory cortex possesses distinct dynamics related to the anatomical and functional diversity of the fronto-auditory circuit.
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Affiliation(s)
- Francisco García-Rosales
- Ernst Strüngmann Institute (ESI) for Neuroscience in Cooperation with Max Planck Society, Frankfurt am Main 60528, Germany
| | - Natalie Schaworonkow
- Ernst Strüngmann Institute (ESI) for Neuroscience in Cooperation with Max Planck Society, Frankfurt am Main 60528, Germany
| | - Julio C Hechavarria
- Institut für Zellbiologie und Neurowissenschaft, Goethe-Universität, Frankfurt am Main 60438, Germany
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2
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Gonzalez-Palomares E, Boulanger-Bertolus J, Dupin M, Mouly AM, Hechavarria JC. Amplitude modulation pattern of rat distress vocalisations during fear conditioning. Sci Rep 2023; 13:11173. [PMID: 37429931 PMCID: PMC10333300 DOI: 10.1038/s41598-023-38051-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Accepted: 07/02/2023] [Indexed: 07/12/2023] Open
Abstract
In humans, screams have strong amplitude modulations (AM) at 30 to 150 Hz. These AM correspond to the acoustic correlate of perceptual roughness. In bats, distress calls can carry AMs, which elicit heart rate increases in playback experiments. Whether amplitude modulation occurs in fearful vocalisations of other animal species beyond humans and bats remains unknown. Here we analysed the AM pattern of rats' 22-kHz ultrasonic vocalisations emitted in a fear conditioning task. We found that the number of vocalisations decreases during the presentation of conditioned stimuli. We also observed that AMs do occur in rat 22-kHz vocalisations. AMs are stronger during the presentation of conditioned stimuli, and during escape behaviour compared to freezing. Our results suggest that the presence of AMs in vocalisations emitted could reflect the animal's internal state of fear related to avoidance behaviour.
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Affiliation(s)
| | - Julie Boulanger-Bertolus
- CNRS, INSERM, Centre de Recherche en Neurosciences de Lyon CRNL U1028 UMR5292, CMO, Université Claude Bernard Lyon 1, 69500, Bron, France
| | - Maryne Dupin
- CNRS, INSERM, Centre de Recherche en Neurosciences de Lyon CRNL U1028 UMR5292, CMO, Université Claude Bernard Lyon 1, 69500, Bron, France
| | - Anne-Marie Mouly
- CNRS, INSERM, Centre de Recherche en Neurosciences de Lyon CRNL U1028 UMR5292, CMO, Université Claude Bernard Lyon 1, 69500, Bron, France.
| | - Julio C Hechavarria
- Institute for Cell Biology and Neuroscience, Goethe University, 60438, Frankfurt am Main, Germany.
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3
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López-Jury L, García-Rosales F, González-Palomares E, Wetekam J, Pasek M, Hechavarria JC. A neuron model with unbalanced synaptic weights explains the asymmetric effects of anaesthesia on the auditory cortex. PLoS Biol 2023; 21:e3002013. [PMID: 36802356 PMCID: PMC10013928 DOI: 10.1371/journal.pbio.3002013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 03/14/2023] [Accepted: 01/27/2023] [Indexed: 02/23/2023] Open
Abstract
Substantial progress in the field of neuroscience has been made from anaesthetized preparations. Ketamine is one of the most used drugs in electrophysiology studies, but how ketamine affects neuronal responses is poorly understood. Here, we used in vivo electrophysiology and computational modelling to study how the auditory cortex of bats responds to vocalisations under anaesthesia and in wakefulness. In wakefulness, acoustic context increases neuronal discrimination of natural sounds. Neuron models predicted that ketamine affects the contextual discrimination of sounds regardless of the type of context heard by the animals (echolocation or communication sounds). However, empirical evidence showed that the predicted effect of ketamine occurs only if the acoustic context consists of low-pitched sounds (e.g., communication calls in bats). Using the empirical data, we updated the naïve models to show that differential effects of ketamine on cortical responses can be mediated by unbalanced changes in the firing rate of feedforward inputs to cortex, and changes in the depression of thalamo-cortical synaptic receptors. Combined, our findings obtained in vivo and in silico reveal the effects and mechanisms by which ketamine affects cortical responses to vocalisations.
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Affiliation(s)
- Luciana López-Jury
- Institute for Cell Biology and Neuroscience, Goethe University, Frankfurt am Main, Germany
- * E-mail: (LL-J); (JCH)
| | - Francisco García-Rosales
- Institute for Cell Biology and Neuroscience, Goethe University, Frankfurt am Main, Germany
- Ernst Strüngmann Institute (ESI) for Neuroscience in Cooperation with Max Planck Society, Frankfurt am Main, Germany
| | | | - Johannes Wetekam
- Institute for Cell Biology and Neuroscience, Goethe University, Frankfurt am Main, Germany
| | - Michael Pasek
- Institut für Theoretische Physik, Goethe University, Frankfurt am Main, Germany
| | - Julio C. Hechavarria
- Institute for Cell Biology and Neuroscience, Goethe University, Frankfurt am Main, Germany
- * E-mail: (LL-J); (JCH)
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Happel MFK, Hechavarria JC, de Hoz L. Editorial: Cortical-Subcortical Loops in Sensory Processing. Front Neural Circuits 2022; 16:851612. [PMID: 35185480 PMCID: PMC8854134 DOI: 10.3389/fncir.2022.851612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Accepted: 01/11/2022] [Indexed: 11/13/2022] Open
Affiliation(s)
- Max F. K. Happel
- Medical Faculty, MSB Medical School Berlin, Berlin, Germany
- RG CortXplorer, Leibniz-Institute for Neurobiology, Magdeburg, Germany
- *Correspondence: Max F. K. Happel
| | - Julio C. Hechavarria
- Institute for Cell Biology and Neuroscience, Goethe University, Frankfurt am Main, Germany
| | - Livia de Hoz
- Neuroscience Research Center, Charité Medical University, Berlin, Germany
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5
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González-Palomares E, López-Jury L, Wetekam J, Kiai A, García-Rosales F, Hechavarria JC. Male Carollia perspicillata bats call more than females in a distressful context. R Soc Open Sci 2021; 8:202336. [PMID: 34040789 PMCID: PMC8113905 DOI: 10.1098/rsos.202336] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Accepted: 04/16/2021] [Indexed: 06/12/2023]
Abstract
Distress calls are a vocalization type widespread across the animal kingdom, emitted when the animals are under duress, e.g. when captured by a predator. Here, we report on an observation we came across serendipitously while recording distress calls from the bat species Carollia perspicillata, i.e. the existence of sex difference in the distress calling behaviour of this species. We show that in C. perspicillata bats, males are more likely to produce distress vocalizations than females when hand-held. Male bats call more, their calls are louder, harsher (faster amplitude modulated) and cover lower carrier frequencies than female vocalizations. We discuss our results within a framework of potential hormonal, neurobiological and behavioural differences that could explain our findings, and open multiple paths to continue the study of sex-related differences in vocal behaviour in bats.
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Affiliation(s)
| | - Luciana López-Jury
- Institute for Cell Biology and Neuroscience, Goethe University, 60438 Frankfurt am Main, Germany
| | - Johannes Wetekam
- Institute for Cell Biology and Neuroscience, Goethe University, 60438 Frankfurt am Main, Germany
| | - Ava Kiai
- Institute for Cell Biology and Neuroscience, Goethe University, 60438 Frankfurt am Main, Germany
| | - Francisco García-Rosales
- Institute for Cell Biology and Neuroscience, Goethe University, 60438 Frankfurt am Main, Germany
| | - Julio C. Hechavarria
- Institute for Cell Biology and Neuroscience, Goethe University, 60438 Frankfurt am Main, Germany
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Macias S, Bakshi K, Garcia-Rosales F, Hechavarria JC, Smotherman M. Temporal coding of echo spectral shape in the bat auditory cortex. PLoS Biol 2020; 18:e3000831. [PMID: 33170833 PMCID: PMC7678962 DOI: 10.1371/journal.pbio.3000831] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 11/20/2020] [Accepted: 10/01/2020] [Indexed: 01/26/2023] Open
Abstract
Echolocating bats rely upon spectral interference patterns in echoes to reconstruct fine details of a reflecting object’s shape. However, the acoustic modulations required to do this are extremely brief, raising questions about how their auditory cortex encodes and processes such rapid and fine spectrotemporal details. Here, we tested the hypothesis that biosonar target shape representation in the primary auditory cortex (A1) is more reliably encoded by changes in spike timing (latency) than spike rates and that latency is sufficiently precise to support a synchronization-based ensemble representation of this critical auditory object feature space. To test this, we measured how the spatiotemporal activation patterns of A1 changed when naturalistic spectral notches were inserted into echo mimic stimuli. Neurons tuned to notch frequencies were predicted to exhibit longer latencies and lower mean firing rates due to lower signal amplitudes at their preferred frequencies, and both were found to occur. Comparative analyses confirmed that significantly more information was recoverable from changes in spike times relative to concurrent changes in spike rates. With this data, we reconstructed spatiotemporal activation maps of A1 and estimated the level of emerging neuronal spike synchrony between cortical neurons tuned to different frequencies. The results support existing computational models, indicating that spectral interference patterns may be efficiently encoded by a cascading tonotopic sequence of neural synchronization patterns within an ensemble of network activity that relates to the physical features of the reflecting object surface. Echolocating bats rely upon spectral interference patterns in echoes to reconstruct fine details of a reflecting object’s shape. This study shows that the latency shifts induced by spectral notch patterns can provide the foundation for an avalanche of neuronal synchrony that is sufficient to support encoding of auditory object shape features during active biosonar.
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Affiliation(s)
- Silvio Macias
- Department of Biology, Texas A&M University, College Station, Texas, United States of America
- * E-mail:
| | - Kushal Bakshi
- Department of Biology, Texas A&M University, College Station, Texas, United States of America
| | | | - Julio C. Hechavarria
- Institut für Zellbiologie und Neurowissenschaft, Goethe-Universität, Frankfurt/M., Germany
| | - Michael Smotherman
- Department of Biology, Texas A&M University, College Station, Texas, United States of America
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García-Rosales F, López-Jury L, González-Palomares E, Cabral-Calderín Y, Kössl M, Hechavarria JC. Phase-amplitude coupling profiles differ in frontal and auditory cortices of bats. Eur J Neurosci 2020; 55:3483-3501. [PMID: 32979875 DOI: 10.1111/ejn.14986] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 09/15/2020] [Accepted: 09/16/2020] [Indexed: 11/29/2022]
Abstract
Neural oscillations are at the core of important computations in the mammalian brain. Interactions between oscillatory activities in different frequency bands, such as delta (1-4 Hz), theta (4-8 Hz) or gamma (>30 Hz), are a powerful mechanism for binding fundamentally distinct spatiotemporal scales of neural processing. Phase-amplitude coupling (PAC) is one such plausible and well-described interaction, but much is yet to be uncovered regarding how PAC dynamics contribute to sensory representations. In particular, although PAC appears to have a major role in audition, the characteristics of coupling profiles in sensory and integration (i.e. frontal) cortical areas remain obscure. Here, we address this question by studying PAC dynamics in the frontal-auditory field (FAF; an auditory area in the bat frontal cortex) and the auditory cortex (AC) of the bat Carollia perspicillata. By means of simultaneous electrophysiological recordings in frontal and auditory cortices examining local-field potentials (LFPs), we show that the amplitude of gamma-band activity couples with the phase of low-frequency LFPs in both structures. Our results demonstrate that the coupling in FAF occurs most prominently in delta/high-gamma frequencies (1-4/75-100 Hz), whereas in the AC the coupling is strongest in the delta-theta/low-gamma (2-8/25-55 Hz) range. We argue that distinct PAC profiles may represent different mechanisms for neuronal processing in frontal and auditory cortices, and might complement oscillatory interactions for sensory processing in the frontal-auditory cortex network.
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Affiliation(s)
| | - Luciana López-Jury
- Institut für Zellbiologie und Neurowissenschaft, Goethe-Universität, Frankfurt/M, Germany
| | | | - Yuranny Cabral-Calderín
- Research Group Neural and Environmental Rhythms, Max Planck Institute for Empirical Aesthetics, Frankfurt/M, Germany
| | - Manfred Kössl
- Institut für Zellbiologie und Neurowissenschaft, Goethe-Universität, Frankfurt/M, Germany
| | - Julio C Hechavarria
- Institut für Zellbiologie und Neurowissenschaft, Goethe-Universität, Frankfurt/M, Germany
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8
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Wetekam J, Reissig C, Hechavarria JC, Kössl M. Auditory brainstem responses in the bat Carollia perspicillata: threshold calculation and relation to audiograms based on otoacoustic emission measurement. J Comp Physiol A Neuroethol Sens Neural Behav Physiol 2019; 206:95-101. [PMID: 31853637 DOI: 10.1007/s00359-019-01394-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Revised: 12/02/2019] [Accepted: 12/07/2019] [Indexed: 01/16/2023]
Abstract
An objective method to evaluate auditory brainstem-evoked responses (ABR) based on the root-mean-square (rms) amplitude of the measured signal and bootstrapping procedures was used to determine threshold curves (see Lv et al. in Med Eng Phys 29:191-198, 2007; Linnenschmidt and Wiegrebe in Hear Res 373:85-95, 2019). The rms values and their significance for threshold determination depended strongly on the filtering of the signal. Using the minimum threshold values obtained at three different low-frequency filter corner frequencies (30, 100, 300 Hz), ABR threshold curves were calculated. The course of the ABR thresholds was comparable to that of published DPOAE (distortion-product otoacoustic emission) thresholds based on a - 10 dB SPL threshold criterion for the 2f1-f2 emission (Schlenther et al. in J Assoc Res Otolaryngol 15:695-705, 2014, frequency range 10-90 kHz). For frequencies between 20 and 80 kHz, which is the most sensitive part of the bat's audiogram, median thresholds ranged between 10 and 28 dB SPL, and the DPOAE thresholds ranged between 10 and 23 dB SPL. At frequencies below 20 kHz (5-20 kHz) and above 80 kHz (80-120 kHz), ABR thresholds increased by 20 dB/octave and 45 dB/octave, respectively. We conclude that the combination of objective threshold determination and multiple filtering of the signal gives reliable ABR thresholds comparable to cochlear threshold curves.
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Affiliation(s)
- Johannes Wetekam
- Institute for Cell Biology and Neuroscience, Goethe University, Max-von-Laue-Straße 13, 60439, Frankfurt, Germany
| | - Christin Reissig
- Institute for Cell Biology and Neuroscience, Goethe University, Max-von-Laue-Straße 13, 60439, Frankfurt, Germany
| | - Julio C Hechavarria
- Institute for Cell Biology and Neuroscience, Goethe University, Max-von-Laue-Straße 13, 60439, Frankfurt, Germany
| | - Manfred Kössl
- Institute for Cell Biology and Neuroscience, Goethe University, Max-von-Laue-Straße 13, 60439, Frankfurt, Germany.
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9
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López-Jury L, Mannel A, García-Rosales F, Hechavarria JC. Modified synaptic dynamics predict neural activity patterns in an auditory field within the frontal cortex. Eur J Neurosci 2019; 51:1011-1025. [PMID: 31630441 DOI: 10.1111/ejn.14600] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Revised: 09/27/2019] [Accepted: 10/03/2019] [Indexed: 01/08/2023]
Abstract
Frontal areas of the mammalian cortex are thought to be important for cognitive control and complex behaviour. These areas have been studied mostly in humans, non-human primates and rodents. In this article, we present a quantitative characterization of response properties of a frontal auditory area responsive to sound in the brain of Carollia perspicillata, the frontal auditory field (FAF). Bats are highly vocal animals, and they constitute an important experimental model for studying the auditory system. We combined electrophysiology experiments and computational simulations to compare the response properties of auditory neurons found in the bat FAF and auditory cortex (AC) to simple sounds (pure tones). Anatomical studies have shown that the latter provides feedforward inputs to the former. Our results show that bat FAF neurons are responsive to sounds, and however, when compared to AC neurons, they presented sparser, less precise spiking and longer-lasting responses. Based on the results of an integrate-and-fire neuronal model, we suggest that slow, subthreshold, synaptic dynamics can account for the activity pattern of neurons in the FAF. These properties reflect the general function of the frontal cortex and likely result from its connections with multiple brain regions, including cortico-cortical projections from the AC to the FAF.
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Affiliation(s)
- Luciana López-Jury
- Institut für Zellbiologie und Neurowissenschaft, Goethe-Universität, Frankfurt/Main, Germany
| | - Adrian Mannel
- Institut für Zellbiologie und Neurowissenschaft, Goethe-Universität, Frankfurt/Main, Germany
| | | | - Julio C Hechavarria
- Institut für Zellbiologie und Neurowissenschaft, Goethe-Universität, Frankfurt/Main, Germany
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10
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García-Rosales F, Röhrig D, Weineck K, Röhm M, Lin YH, Cabral-Calderin Y, Kössl M, Hechavarria JC. Laminar specificity of oscillatory coherence in the auditory cortex. Brain Struct Funct 2019; 224:2907-2924. [PMID: 31456067 DOI: 10.1007/s00429-019-01944-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Accepted: 08/16/2019] [Indexed: 12/11/2022]
Abstract
Empirical evidence suggests that, in the auditory cortex (AC), the phase relationship between spikes and local-field potentials (LFPs) plays an important role in the processing of auditory stimuli. Nevertheless, unlike the case of other sensory systems, it remains largely unexplored in the auditory modality whether the properties of the cortical columnar microcircuit shape the dynamics of spike-LFP coherence in a layer-specific manner. In this study, we directly tackle this issue by addressing whether spike-LFP and LFP-stimulus phase synchronization are spatially distributed in the AC during sensory processing, by performing laminar recordings in the cortex of awake short-tailed bats (Carollia perspicillata) while animals listened to conspecific distress vocalizations. We show that, in the AC, spike-LFP and LFP-stimulus synchrony depend significantly on cortical depth, and that sensory stimulation alters the spatial and spectral patterns of spike-LFP phase-locking. We argue that such laminar distribution of coherence could have functional implications for the representation of naturalistic auditory stimuli at a cortical level.
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Affiliation(s)
- Francisco García-Rosales
- Institut für Zellbiologie und Neurowissenschaft, Goethe-Universität, Max-von-Laue-Str. 13, 60438, Frankfurt/Main, Germany.
| | - Dennis Röhrig
- Institut für Zellbiologie und Neurowissenschaft, Goethe-Universität, Max-von-Laue-Str. 13, 60438, Frankfurt/Main, Germany
| | - Kristin Weineck
- Institut für Zellbiologie und Neurowissenschaft, Goethe-Universität, Max-von-Laue-Str. 13, 60438, Frankfurt/Main, Germany
| | - Mira Röhm
- Institut für Zellbiologie und Neurowissenschaft, Goethe-Universität, Max-von-Laue-Str. 13, 60438, Frankfurt/Main, Germany
| | - Yi-Hsuan Lin
- Institut für Zellbiologie und Neurowissenschaft, Goethe-Universität, Max-von-Laue-Str. 13, 60438, Frankfurt/Main, Germany
| | - Yuranny Cabral-Calderin
- Research Group Neural and Environmental Rhythms, Max Planck Institute for Empirical Aesthetics, 60322, Frankfurt/Main, Germany
| | - Manfred Kössl
- Institut für Zellbiologie und Neurowissenschaft, Goethe-Universität, Max-von-Laue-Str. 13, 60438, Frankfurt/Main, Germany
| | - Julio C Hechavarria
- Institut für Zellbiologie und Neurowissenschaft, Goethe-Universität, Max-von-Laue-Str. 13, 60438, Frankfurt/Main, Germany.
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11
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García-Rosales F, Beetz MJ, Cabral-Calderin Y, Kössl M, Hechavarria JC. Neuronal coding of multiscale temporal features in communication sequences within the bat auditory cortex. Commun Biol 2018; 1:200. [PMID: 30480101 PMCID: PMC6244232 DOI: 10.1038/s42003-018-0205-5] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Accepted: 10/30/2018] [Indexed: 11/18/2022] Open
Abstract
Experimental evidence supports that cortical oscillations represent multiscale temporal modulations existent in natural stimuli, yet little is known about the processing of these multiple timescales at a neuronal level. Here, using extracellular recordings from the auditory cortex (AC) of awake bats (Carollia perspicillata), we show the existence of three neuronal types which represent different levels of the temporal structure of conspecific vocalizations, and therefore constitute direct evidence of multiscale temporal processing of naturalistic stimuli by neurons in the AC. These neuronal subpopulations synchronize differently to local-field potentials, particularly in theta- and high frequency bands, and are informative to a different degree in terms of their spike rate. Interestingly, we also observed that both low and high frequency cortical oscillations can be highly informative about the listened calls. Our results suggest that multiscale neuronal processing allows for the precise and non-redundant representation of natural vocalizations in the AC.
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Affiliation(s)
- Francisco García-Rosales
- Institut für Zellbiologie und Neurowissenschaft, Goethe-Universität, 60438, Frankfurt/M., Germany.
| | - M Jerome Beetz
- Institut für Zellbiologie und Neurowissenschaft, Goethe-Universität, 60438, Frankfurt/M., Germany
- Department of Zoology II, University of Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Yuranny Cabral-Calderin
- MEG Labor, Brain Imaging Center, Goethe-Universität, 60528, Frankfurt/M., Germany
- German Resilience Center, University Medical Center Mainz, 55131, Mainz, Germany
| | - Manfred Kössl
- Institut für Zellbiologie und Neurowissenschaft, Goethe-Universität, 60438, Frankfurt/M., Germany
| | - Julio C Hechavarria
- Institut für Zellbiologie und Neurowissenschaft, Goethe-Universität, 60438, Frankfurt/M., Germany.
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12
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García-Rosales F, Martin LM, Beetz MJ, Cabral-Calderin Y, Kössl M, Hechavarria JC. Low-Frequency Spike-Field Coherence Is a Fingerprint of Periodicity Coding in the Auditory Cortex. iScience 2018; 9:47-62. [PMID: 30384133 PMCID: PMC6214842 DOI: 10.1016/j.isci.2018.10.009] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Revised: 06/20/2018] [Accepted: 10/10/2018] [Indexed: 11/04/2022] Open
Abstract
The extraction of temporal information from sensory input streams is of paramount importance in the auditory system. In this study, amplitude-modulated sounds were used as stimuli to drive auditory cortex (AC) neurons of the bat species Carollia perspicillata, to assess the interactions between cortical spikes and local-field potentials (LFPs) for the processing of temporal acoustic cues. We observed that neurons in the AC capable of eliciting synchronized spiking to periodic acoustic envelopes were significantly more coherent to theta- and alpha-band LFPs than their non-synchronized counterparts. These differences occurred independently of the modulation rate tested and could not be explained by power or phase modulations of the field potentials. We argue that the coupling between neuronal spiking and the phase of low-frequency LFPs might be important for orchestrating the coding of temporal acoustic structures in the AC. Auditory cortical neurons can track periodic sounds via synchronized spiking Neuronal synchronization ability is well marked by theta-alpha spike-LFP coherence Spike-LFP coherence patterns are independent of the stimulus' periodicity Theta-alpha LFPs may orchestrate phase-locked neuronal responses to periodic sounds
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Affiliation(s)
- Francisco García-Rosales
- Institut für Zellbiologie und Neurowissenschaft, Goethe-Universität, Max-von-Laue-Str. 13, 60438 Frankfurt am Main, Germany.
| | - Lisa M Martin
- Institut für Zellbiologie und Neurowissenschaft, Goethe-Universität, Max-von-Laue-Str. 13, 60438 Frankfurt am Main, Germany
| | - M Jerome Beetz
- Institut für Zellbiologie und Neurowissenschaft, Goethe-Universität, Max-von-Laue-Str. 13, 60438 Frankfurt am Main, Germany
| | - Yuranny Cabral-Calderin
- MEG Labor, Brain Imaging Center, Goethe-Universität, 60528 Frankfurt am Main, Germany; German Resilience Center, University Medical Center Mainz, Mainz, Germany
| | - Manfred Kössl
- Institut für Zellbiologie und Neurowissenschaft, Goethe-Universität, Max-von-Laue-Str. 13, 60438 Frankfurt am Main, Germany
| | - Julio C Hechavarria
- Institut für Zellbiologie und Neurowissenschaft, Goethe-Universität, Max-von-Laue-Str. 13, 60438 Frankfurt am Main, Germany.
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Kössl M, Hechavarria JC, Voss C, Macias S, Mora EC, Vater M. Neural maps for target range in the auditory cortex of echolocating bats. Curr Opin Neurobiol 2013; 24:68-75. [PMID: 24492081 DOI: 10.1016/j.conb.2013.08.016] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2013] [Revised: 08/16/2013] [Accepted: 08/18/2013] [Indexed: 11/25/2022]
Abstract
Computational brain maps as opposed to maps of receptor surfaces strongly reflect functional neuronal design principles. In echolocating bats, computational maps are established that topographically represent the distance of objects. These target range maps are derived from the temporal delay between emitted call and returning echo and constitute a regular representation of time (chronotopy). Basic features of these maps are innate, and in different bat species the map size and precision varies. An inherent advantage of target range maps is the implementation of mechanisms for lateral inhibition and excitatory feedback. Both can help to focus target ranging depending on the actual echolocation situation. However, these maps are not absolutely necessary for bat echolocation since there are bat species without cortical target-distance maps, which use alternative ensemble computation mechanisms.
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Affiliation(s)
- M Kössl
- Institute for Cell Biology and Neuroscience, Goethe University, Frankfurt, Max-von-Laue-Str. 13, 60439 Frankfurt, Germany.
| | - J C Hechavarria
- Institute for Cell Biology and Neuroscience, Goethe University, Frankfurt, Max-von-Laue-Str. 13, 60439 Frankfurt, Germany
| | - C Voss
- Institute for Cell Biology and Neuroscience, Goethe University, Frankfurt, Max-von-Laue-Str. 13, 60439 Frankfurt, Germany
| | - S Macias
- Department of Animal and Human Biology, Faculty of Biology, Havana University, calle 25 No. 455 entre J e I, Vedado, CP 10400, Ciudad de La Habana, Cuba
| | - E C Mora
- Department of Animal and Human Biology, Faculty of Biology, Havana University, calle 25 No. 455 entre J e I, Vedado, CP 10400, Ciudad de La Habana, Cuba
| | - M Vater
- Institute for Biochemistry and Biology, University of Potsdam, Karl Liebknecht Str. 26, 14476 Golm, Germany
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