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Fan Y, Fang K, Sun R, Shen D, Yang J, Tang Y, Fang G. Hierarchical auditory perception for species discrimination and individual recognition in the music frog. Curr Zool 2021; 68:581-591. [DOI: 10.1093/cz/zoab085] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2021] [Accepted: 10/01/2021] [Indexed: 11/12/2022] Open
Abstract
Abstract
The ability to discriminate species and recognize individuals is crucial for reproductive success and/or survival in most animals. However, the temporal order and neural localization of these decision-making processes has remained unclear. In this study, event-related potentials (ERPs) were measured in the telencephalon, diencephalon, and mesencephalon of the music frog Nidirana daunchina. These ERPs were elicited by calls from 1 group of heterospecifics (recorded from a sympatric anuran species) and 2 groups of conspecifics that differed in their fundamental frequencies. In terms of the polarity and position within the ERP waveform, auditory ERPs generally consist of 4 main components that link to selective attention (N1), stimulus evaluation (P2), identification (N2), and classification (P3). These occur around 100, 200, 250, and 300 ms after stimulus onset, respectively. Our results show that the N1 amplitudes differed significantly between the heterospecific and conspecific calls, but not between the 2 groups of conspecific calls that differed in fundamental frequency. On the other hand, the N2 amplitudes were significantly different between the 2 groups of conspecific calls, suggesting that the music frogs discriminated the species first, followed by individual identification, since N1 and N2 relate to selective attention and stimuli identification, respectively. Moreover, the P2 amplitudes evoked in females were significantly greater than those in males, indicating the existence of sexual dimorphism in auditory discrimination. In addition, both the N1 amplitudes in the left diencephalon and the P2 amplitudes in the left telencephalon were greater than in other brain areas, suggesting left hemispheric dominance in auditory perception. Taken together, our results support the hypothesis that species discrimination and identification of individual characteristics are accomplished sequentially, and that auditory perception exhibits differences between sexes and in spatial dominance.
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Affiliation(s)
- Yanzhu Fan
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ke Fang
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China
- School of Life Science, Anhui University, Hefei 230601, China
| | - Ruolei Sun
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China
- School of Life Science, Anhui University, Hefei 230601, China
| | - Di Shen
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jing Yang
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yezhong Tang
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Guangzhan Fang
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
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Shen J, Fang K, Liu P, Fan Y, Yang J, Shen D, Song J, Fang G. Low-frequency electroencephalogram oscillations govern left-eye lateralization during anti-predatory responses in the music frog. J Exp Biol 2020; 223:jeb232637. [PMID: 32967996 DOI: 10.1242/jeb.232637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Accepted: 09/15/2020] [Indexed: 11/20/2022]
Abstract
Visual lateralization is widespread for prey and anti-predation in numerous taxa. However, it is still unknown how the brain governs this asymmetry. In this study, we conducted behavioral and electrophysiological experiments to evaluate anti-predatory behaviors and dynamic brain activities in Emei music frogs (Nidirana daunchina), to explore the potential eye bias for anti-predation and the underlying neural mechanisms. To do this, predator stimuli (a model snake head and a leaf as a control) were moved around the subjects in clockwise and anti-clockwise directions at steady velocity. We counted the number of anti-predatory responses and measured electroencephalogram (EEG) power spectra for each band and brain area (telencephalon, diencephalon and mesencephalon). Our results showed that (1) no significant eye preferences could be found for the control (leaf); however, the laterality index was significantly lower than zero when the predator stimulus was moved anti-clockwise, suggesting that left-eye advantage exists in this species for anti-predation; (2) compared with no stimulus in the visual field, the power spectra of delta and alpha bands were significantly greater when the predator stimulus was moved into the left visual field anti-clockwise; and, (3) generally, the power spectra of each band in the right-hemisphere for the left visual field were higher than those in the left counterpart. These results support that the left eye mediates the monitoring of a predator in music frogs and lower-frequency EEG oscillations govern this visual lateralization.
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Affiliation(s)
- Jiangyan Shen
- Key Laboratory of Southwest China Wildlife Resources Conservation (Ministry of Education), China West Normal University, No. 1 Shi Da Road, Nanchong, 637009 Sichuan, China
- Chengdu Institute of Biology, Chinese Academy of Sciences, No. 9 Section 4, Renmin Nan Road, Chengdu, 610041 Sichuan, China
- University of Chinese Academy of Sciences, No. 19A Yuquan Road, 100049 Beijing, China
| | - Ke Fang
- Chengdu Institute of Biology, Chinese Academy of Sciences, No. 9 Section 4, Renmin Nan Road, Chengdu, 610041 Sichuan, China
| | - Ping Liu
- Chengdu Institute of Biology, Chinese Academy of Sciences, No. 9 Section 4, Renmin Nan Road, Chengdu, 610041 Sichuan, China
- University of Chinese Academy of Sciences, No. 19A Yuquan Road, 100049 Beijing, China
| | - Yanzhu Fan
- Chengdu Institute of Biology, Chinese Academy of Sciences, No. 9 Section 4, Renmin Nan Road, Chengdu, 610041 Sichuan, China
- University of Chinese Academy of Sciences, No. 19A Yuquan Road, 100049 Beijing, China
| | - Jing Yang
- Chengdu Institute of Biology, Chinese Academy of Sciences, No. 9 Section 4, Renmin Nan Road, Chengdu, 610041 Sichuan, China
- University of Chinese Academy of Sciences, No. 19A Yuquan Road, 100049 Beijing, China
| | - Di Shen
- Chengdu Institute of Biology, Chinese Academy of Sciences, No. 9 Section 4, Renmin Nan Road, Chengdu, 610041 Sichuan, China
- University of Chinese Academy of Sciences, No. 19A Yuquan Road, 100049 Beijing, China
| | - Jinjin Song
- School of Life Science, Anhui University, Hefei, 230601 Anhui, China
| | - Guangzhan Fang
- Key Laboratory of Southwest China Wildlife Resources Conservation (Ministry of Education), China West Normal University, No. 1 Shi Da Road, Nanchong, 637009 Sichuan, China
- Chengdu Institute of Biology, Chinese Academy of Sciences, No. 9 Section 4, Renmin Nan Road, Chengdu, 610041 Sichuan, China
- University of Chinese Academy of Sciences, No. 19A Yuquan Road, 100049 Beijing, China
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Shen J, Fang K, Fan Y, Song J, Yang J, Shen D, Liu Y, Fang G. Dynamics of electroencephalogram oscillations underlie right-eye preferences in predatory behavior of the music frog. ACTA ACUST UNITED AC 2019; 222:jeb.212175. [PMID: 31611293 DOI: 10.1242/jeb.212175] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Accepted: 10/07/2019] [Indexed: 12/15/2022]
Abstract
Visual lateralization is a typical characteristic of many vertebrates; however, its underlying dynamic neural mechanism is unclear. In this study, predatory responses and dynamic brain activities were evaluated in the Emei music frog (Nidirana daunchina) to assess the potential eye preferences and their underlying dynamic neural mechanism, using behavioral and electrophysiological experiments, respectively. To do this, when the prey stimulus (live cricket and leaf as control) was moved around the frogs in both clockwise and anticlockwise directions at constant velocity, the number of predatory responses were counted and electroencephalogram (EEG) absolute power spectra for each band were measured for the telencephalon, diencephalon and mesencephalon. The results showed that: (1) no significant differences in the number of predatory responses could be found for the control (leaf), but the number of predatory responses for the right visual field (RVF) was significantly greater than that for the left visual field (LVF) when the live cricket was moved into the RVF clockwise; (2) compared with no stimulus in the visual field and stimulus in the LVF, the power spectra of each EEG band were greater when the prey stimulus was moved into the RVF clockwise; and (3) the power spectra of the theta, alpha and beta bands in the left diencephalon were significantly greater than those of the right counterpart for the clockwise direction, but similar significant differences presented for the delta, theta and alpha bands in the anticlockwise direction. Together, the results suggested that right-eye preferences for predatory behaviors exist in music frogs, and that the dynamics of EEG oscillations might underlie this right eye/left hemisphere advantage.
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Affiliation(s)
- Jiangyan Shen
- Chengdu Institute of Biology, Chinese Academy of Sciences, No. 9 Section 4, Renmin Nan Road, Chengdu, Sichuan, People's Republic of China.,University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing, People's Republic of China
| | - Ke Fang
- Chengdu Institute of Biology, Chinese Academy of Sciences, No. 9 Section 4, Renmin Nan Road, Chengdu, Sichuan, People's Republic of China
| | - Yanzhu Fan
- Chengdu Institute of Biology, Chinese Academy of Sciences, No. 9 Section 4, Renmin Nan Road, Chengdu, Sichuan, People's Republic of China.,University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing, People's Republic of China
| | - Jinjin Song
- School of Life Science, Anhui University, Hefei, Anhui, People's Republic of China
| | - Jing Yang
- Chengdu Institute of Biology, Chinese Academy of Sciences, No. 9 Section 4, Renmin Nan Road, Chengdu, Sichuan, People's Republic of China.,University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing, People's Republic of China
| | - Di Shen
- Chengdu Institute of Biology, Chinese Academy of Sciences, No. 9 Section 4, Renmin Nan Road, Chengdu, Sichuan, People's Republic of China.,University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing, People's Republic of China
| | - Yansu Liu
- Sichuan Nursing Vocational College, No. 173, Longdu Nan Road, Longquan District, Chengdu, Sichuan, People's Republic of China
| | - Guangzhan Fang
- Chengdu Institute of Biology, Chinese Academy of Sciences, No. 9 Section 4, Renmin Nan Road, Chengdu, Sichuan, People's Republic of China
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Fan Y, Yue X, Yang J, Shen J, Shen D, Tang Y, Fang G. Preference of spectral features in auditory processing for advertisement calls in the music frogs. Front Zool 2019; 16:13. [PMID: 31168310 PMCID: PMC6509768 DOI: 10.1186/s12983-019-0314-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Accepted: 04/22/2019] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Animal vocal signals encode very important information for communication during which the importance of temporal and spectral characteristics of vocalizations is always asymmetrical and species-specific. However, it is still unknown how auditory system represents this asymmetrical and species-specific patterns. In this study, auditory event related potential (ERP) changes were evaluated in the Emei music frog (Babina daunchina) to assess the differences in eliciting neural responses of both temporal and spectral features for the telencephalon, diencephalon and mesencephalon respectively. To do this, an acoustic playback experiment using an oddball paradigm design was conducted, in which an original advertisement call (OC), its spectral feature preserved version (SC) and temporal feature preserved version (TC) were used as deviant stimuli with synthesized white noise as standard stimulus. RESULTS The present results show that 1) compared with TC, more similar ERP components were evoked by OC and SC; and 2) the P3a amplitudes in the forebrain evoked by OC were significantly higher in males than in females. CONCLUSIONS Together, the results provide evidence for suggesting neural processing for conspecific vocalization may prefer to the spectral features in the music frog, prompting speculation that the spectral features may play more important roles in auditory object perception or vocal communication in this species. In addition, the neural processing for auditory perception is sexually dimorphic.
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Affiliation(s)
- Yanzhu Fan
- Department of Herpetology, Chengdu Institute of Biology, Chinese Academy of Sciences, No.9 Section 4, Renmin Nan Road, Chengdu, Sichuan 610041 People’s Republic of China
- University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing, People’s Republic of China
| | - Xizi Yue
- Department of Herpetology, Chengdu Institute of Biology, Chinese Academy of Sciences, No.9 Section 4, Renmin Nan Road, Chengdu, Sichuan 610041 People’s Republic of China
| | - Jing Yang
- Department of Herpetology, Chengdu Institute of Biology, Chinese Academy of Sciences, No.9 Section 4, Renmin Nan Road, Chengdu, Sichuan 610041 People’s Republic of China
- University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing, People’s Republic of China
| | - Jiangyan Shen
- Department of Herpetology, Chengdu Institute of Biology, Chinese Academy of Sciences, No.9 Section 4, Renmin Nan Road, Chengdu, Sichuan 610041 People’s Republic of China
- University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing, People’s Republic of China
| | - Di Shen
- Department of Herpetology, Chengdu Institute of Biology, Chinese Academy of Sciences, No.9 Section 4, Renmin Nan Road, Chengdu, Sichuan 610041 People’s Republic of China
- University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing, People’s Republic of China
| | - Yezhong Tang
- Department of Herpetology, Chengdu Institute of Biology, Chinese Academy of Sciences, No.9 Section 4, Renmin Nan Road, Chengdu, Sichuan 610041 People’s Republic of China
| | - Guangzhan Fang
- Department of Herpetology, Chengdu Institute of Biology, Chinese Academy of Sciences, No.9 Section 4, Renmin Nan Road, Chengdu, Sichuan 610041 People’s Republic of China
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Auditory sensitivity exhibits sexual dimorphism and seasonal plasticity in music frogs. J Comp Physiol A Neuroethol Sens Neural Behav Physiol 2018; 204:1029-1044. [DOI: 10.1007/s00359-018-1301-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Revised: 09/18/2018] [Accepted: 10/21/2018] [Indexed: 12/26/2022]
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6
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Rochais C, Sébilleau M, Menoret M, Oger M, Henry S, Hausberger M, Cousillas H. Attentional state and brain processes: state-dependent lateralization of EEG profiles in horses. Sci Rep 2018; 8:10153. [PMID: 29976936 PMCID: PMC6033862 DOI: 10.1038/s41598-018-28334-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Accepted: 06/13/2018] [Indexed: 11/09/2022] Open
Abstract
Lateralization of brain functions has been suggested to provide individuals with advantages, such as an increase of neural efficiency. The right hemisphere is likely to be specialized for processing attention for details and the left hemisphere for categorization of stimuli. Thus attentional processes actually may underlie lateralization. In the present study, we hypothesized that the attentional state of horses could be reflected in the lateralization of brain responses. We used i) a recently developed attention test to measure horses’ visual attentional responses towards a standardized stimulus and ii) a recently developed portable EEG telemetric tool to measure brain responses. A particular emphasis was given to the types of waves (EEG power profile) and their side of production when horses were either attentive towards a visual stimulus or quiet standing. The results confirmed that a higher attentional state is associated with a higher proportion of gamma waves. There was moreover an interaction between the attentional state, the hemisphere and the EEG profile: attention towards the visual stimulus was associated with a significant increase of gamma wave proportion in the right hemisphere while “inattention” was associated with more alpha and beta waves in the left hemisphere. These first results are highly promising and contribute to the large debate on functional lateralization.
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Affiliation(s)
- C Rochais
- Université de Rennes, UMR 6552 -Laboratoire Ethologie Animale et Humaine-EthoS-, CNRS, Université de Caen-Normandie, Station Biologique, 35380, Paimpont, France
| | - M Sébilleau
- Université de Rennes, UMR 6552 -Laboratoire Ethologie Animale et Humaine-EthoS-, CNRS, Université de Caen-Normandie, Station Biologique, 35380, Paimpont, France
| | - M Menoret
- Université de Rennes, UMR CNRS 6552 -Laboratoire Ethologie Animale et Humaine-EthoS- CNRS, Université de Caen-Normandie, Campus de Beaulieu, 263 avenue du général Leclerc, 35042, Rennes, cedex, France
| | - M Oger
- Université de Rennes, UMR CNRS 6164, IETR Institut d'Electronique de Rennes, Campus de Beaulieu, Avenue du Général Leclerc, 35042, Rennes, cedex, France
| | - S Henry
- Université de Rennes, UMR 6552 -Laboratoire Ethologie Animale et Humaine-EthoS-, CNRS, Université de Caen-Normandie, Station Biologique, 35380, Paimpont, France
| | - M Hausberger
- CNRS- UMR 6552, -Laboratoire Ethologie Animale et Humaine-EthoS-, Université de Rennes 1, Université de Caen-Normandie, 263 avenue du Général Leclerc, 35042, Rennes, Cedex, France
| | - H Cousillas
- Université de Rennes, UMR CNRS 6552 -Laboratoire Ethologie Animale et Humaine-EthoS- CNRS, Université de Caen-Normandie, Campus de Beaulieu, 263 avenue du général Leclerc, 35042, Rennes, cedex, France.
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7
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The First Call Note Plays a Crucial Role in Frog Vocal Communication. Sci Rep 2017; 7:10128. [PMID: 28860503 PMCID: PMC5579009 DOI: 10.1038/s41598-017-09870-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Accepted: 08/01/2017] [Indexed: 11/25/2022] Open
Abstract
Vocal Communication plays a crucial role in survival and reproductive success in most amphibian species. Although amphibian communication sounds are often complex consisting of many temporal features, we know little about the biological significance of each temporal component. The present study examined the biological significance of notes of the male advertisement calls of the Emei music frog (Babina daunchina) using the optimized electroencephalogram (EEG) paradigm of mismatch negativity (MMN). Music frog calls generally contain four to six notes separated approximately by 150 millisecond intervals. A standard stimulus (white noise) and five deviant stimuli (five notes from one advertisement call) were played back to each subject while simultaneously recording multi-channel EEG signals. The results showed that the MMN amplitude for the first call note was significantly larger than for that of the others. Moreover, the MMN amplitudes evoked from the left forebrain and midbrain were typically larger than those from the right counterpart. These results are consistent with the ideas that the first call note conveys more information than the others for auditory recognition and that there is left-hemisphere dominance for processing information derived from conspecific calls in frogs.
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Loris ZB, Danzi M, Sick J, Dietrich WD, Bramlett HM, Sick T. Automated approach to detecting behavioral states using EEG-DABS. Heliyon 2017; 3:e00344. [PMID: 28725869 PMCID: PMC5507012 DOI: 10.1016/j.heliyon.2017.e00344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2017] [Revised: 06/05/2017] [Accepted: 06/28/2017] [Indexed: 11/30/2022] Open
Abstract
Electrocorticographic (ECoG) signals represent cortical electrical dipoles generated by synchronous local field potentials that result from simultaneous firing of neurons at distinct frequencies (brain waves). Since different brain waves correlate to different behavioral states, ECoG signals presents a novel strategy to detect complex behaviors. We developed a program, EEG Detection Analysis for Behavioral States (EEG-DABS) that advances Fast Fourier Transforms through ECoG signals time series, separating it into (user defined) frequency bands and normalizes them to reduce variability. EEG-DABS determines events if segments of an experimental ECoG record have significantly different power bands than a selected control pattern of EEG. Events are identified at every epoch and frequency band and then are displayed as output graphs by the program. Certain patterns of events correspond to specific behaviors. Once a predetermined pattern was selected for a behavioral state, EEG-DABS correctly identified the desired behavioral event. The selection of frequency band combinations for detection of the behavior affects accuracy of the method. All instances of certain behaviors, such as freezing, were correctly identified from the event patterns generated with EEG-DABS. Detecting behaviors is typically achieved by visually discerning unique animal phenotypes, a process that is time consuming, unreliable, and subjective. EEG-DABS removes variability by using defined parameters of EEG/ECoG for a desired behavior over chronic recordings. EEG-DABS presents a simple and automated approach to quantify different behavioral states from ECoG signals.
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Affiliation(s)
- Zachary B Loris
- Department of Neurological Surgery, 1095 NW 14th Terrace, University of Miami Miller School of Medicine, Miami, Florida, 33136, USA.,The Miami Project to Cure Paralysis, University of Miami Miller School of Medicine, 1095 NW 14th Terrace, Miami, Florida, 33136, USA.,Neuroscience Program, 1120 NW 14th Street, University of Miami Miller School of Medicine, Miami, Florida, 33136, USA
| | - Mathew Danzi
- The Miami Project to Cure Paralysis, University of Miami Miller School of Medicine, 1095 NW 14th Terrace, Miami, Florida, 33136, USA.,Neuroscience Program, 1120 NW 14th Street, University of Miami Miller School of Medicine, Miami, Florida, 33136, USA.,Center for Computational Science, University of Miami, Miami, Florida, 33146, USA
| | - Justin Sick
- The Miami Project to Cure Paralysis, University of Miami Miller School of Medicine, 1095 NW 14th Terrace, Miami, Florida, 33136, USA
| | - W Dalton Dietrich
- Department of Neurological Surgery, 1095 NW 14th Terrace, University of Miami Miller School of Medicine, Miami, Florida, 33136, USA.,The Miami Project to Cure Paralysis, University of Miami Miller School of Medicine, 1095 NW 14th Terrace, Miami, Florida, 33136, USA.,Neuroscience Program, 1120 NW 14th Street, University of Miami Miller School of Medicine, Miami, Florida, 33136, USA
| | - Helen M Bramlett
- Department of Neurological Surgery, 1095 NW 14th Terrace, University of Miami Miller School of Medicine, Miami, Florida, 33136, USA.,The Miami Project to Cure Paralysis, University of Miami Miller School of Medicine, 1095 NW 14th Terrace, Miami, Florida, 33136, USA.,Department of Neurology, 1150 NW 14th Street, University of Miami Miller School of Medicine, Miami, Florida, 33136, USA.,Bruce W. Carter Department of Veterans Affairs Medical Center, 1201 NW 16th Street, Miami, Florida, 33125, USA
| | - Thomas Sick
- The Miami Project to Cure Paralysis, University of Miami Miller School of Medicine, 1095 NW 14th Terrace, Miami, Florida, 33136, USA.,Department of Neurology, 1150 NW 14th Street, University of Miami Miller School of Medicine, Miami, Florida, 33136, USA.,Neuroscience Program, 1120 NW 14th Street, University of Miami Miller School of Medicine, Miami, Florida, 33136, USA
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Schmidt M, Lapert F, Brandwein C, Deuschle M, Kasperk C, Grimsley JM, Gass P. Prenatal stress changes courtship vocalizations and bone mineral density in mice. Psychoneuroendocrinology 2017; 75:203-212. [PMID: 27838514 DOI: 10.1016/j.psyneuen.2016.11.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2016] [Revised: 11/03/2016] [Accepted: 11/03/2016] [Indexed: 02/03/2023]
Abstract
Stress during the prenatal period has various effects on social and sexual behavior in both human and animal offspring. The present study examines the effects of chronic restraint stress in the second vs third trimester in pregnancy and glucocorticoid receptor (GR) heterozygous mutation on C57BL/6N male offspring's vocal courtship behavior in adulthood by applying a novel analyzing method. Finally, corticosterone and testosterone levels as well as bone mineral density were measured. Prenatal stress in the third, but not in the second trimester caused a significant qualitative change in males' courtship vocalizations, independent of their GR genotype. Bone mineral density was decreased also by prenatal stress exclusively in the third trimester in GR mutant and wildtype mice and - in contrast to corticosterone and testosterone - highly correlated with courtship vocalizations. In Gr+/- males corticosterone serum levels were significantly increased in animals that had experienced prenatal stress in the third trimester. Testosterone serum levels were overall increased in Gr+/- males in comparison to wildtypes as a tendency - whereas prenatal stress had no influence. Prenatal stress alters adult males' courtship vocalizations exclusively when applied in the third trimester, with closely related changes in bone mineral density. Bone mineral density seems to reflect best the complex neuroendocrine mechanisms underlying the production of courtship vocalizations. Besides, we demonstrated for the first time elevated basal corticosterone levels in Gr+/- males after prenatal stress which suggests that the Gr+/- mouse model of depression might also serve as a model of prenatal stress in male offspring.
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Affiliation(s)
- Michaela Schmidt
- Central Institute of Mental Health Mannheim (ZI), Medical Faculty of Mannheim, University of Heidelberg, J5, D-68159 Mannheim, Germany.
| | - Florian Lapert
- Central Institute of Mental Health Mannheim (ZI), Medical Faculty of Mannheim, University of Heidelberg, J5, D-68159 Mannheim, Germany
| | - Christiane Brandwein
- Central Institute of Mental Health Mannheim (ZI), Medical Faculty of Mannheim, University of Heidelberg, J5, D-68159 Mannheim, Germany
| | - Michael Deuschle
- Central Institute of Mental Health Mannheim (ZI), Medical Faculty of Mannheim, University of Heidelberg, J5, D-68159 Mannheim, Germany
| | - Christian Kasperk
- Department of Medicine I and Clinical Chemistry, University of Heidelberg, Heidelberg, Germany
| | - Jasmine M Grimsley
- Department of Anatomy and Neurobiology, Northeast Ohio Medical University, Rootstown, OH 44272, USA
| | - Peter Gass
- Central Institute of Mental Health Mannheim (ZI), Medical Faculty of Mannheim, University of Heidelberg, J5, D-68159 Mannheim, Germany
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10
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Xue F, Fang G, Yue X, Zhao E, Brauth SE, Tang Y. A lateralized functional auditory network is involved in anuran sexual selection. J Biosci 2016; 41:713-726. [PMID: 27966491 DOI: 10.1007/s12038-016-9638-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Right ear advantage (REA) exists in many land vertebrates in which the right ear and left hemisphere preferentially process conspecific acoustic stimuli such as those related to sexual selection. Although ecological and neural mechanisms for sexual selection have been widely studied, the brain networks involved are still poorly understood. In this study we used multi-channel electroencephalographic data in combination with Granger causal connectivity analysis to demonstrate, for the first time, that auditory neural network interconnecting the left and right midbrain and forebrain function asymmetrically in the Emei music frog (Babina daunchina), an anuran species which exhibits REA. The results showed the network was lateralized. Ascending connections between the mesencephalon and telencephalon were stronger in the left side while descending ones were stronger in the right, which matched with the REA in this species and implied that inhibition from the forebrainmay induce REA partly. Connections from the telencephalon to ipsilateral mesencephalon in response to white noise were the highest in the non-reproductive stage while those to advertisement calls were the highest in reproductive stage, implying the attention resources and living strategy shift when entered the reproductive season. Finally, these connection changes were sexually dimorphic, revealing sex differences in reproductive roles.
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Affiliation(s)
- Fei Xue
- Department of Herpetology, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, Sichuan 610041, P.R. China
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11
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Fang G, Yang P, Xue F, Cui J, Brauth SE, Tang Y. Sound Classification and Call Discrimination Are Decoded in Order as Revealed by Event-Related Potential Components in Frogs. BRAIN, BEHAVIOR AND EVOLUTION 2015; 86:232-45. [DOI: 10.1159/000441215] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Accepted: 09/20/2015] [Indexed: 11/19/2022]
Abstract
Species that use communication sounds to coordinate social and reproductive behavior must be able to distinguish vocalizations from nonvocal sounds as well as to identify individual vocalization types. In this study we sought to identify the neural localization of the processes involved and the temporal order in which they occur in an anuran species, the music frog Babina daunchina. To do this we measured telencephalic and mesencephalic event-related potentials (ERPs) elicited by synthesized white noise (WN), highly sexually attractive (HSA) calls produced by males from inside nests and male calls of low sexual attractiveness (LSA) produced outside of nests. Each stimulus possessed similar temporal structures. The results showed the following: (1) the amplitudes of the first negative ERP component (N1) at ∼100 ms differed significantly between WN and conspecific calls but not between HSA and LSA calls, indicating that discrimination between conspecific calls and nonvocal sounds occurs in ∼100 ms, (2) the amplitudes of the second positive ERP component (P2) at ∼200 ms in the difference waves between HSA calls and WN were significantly higher than between LSA calls and WN in the right telencephalon, implying that call characteristic identification occurs in ∼200 ms and (3) WN evoked a larger third positive ERP component (P3) at ∼300 ms than conspecific calls, suggesting the frogs had classified the conspecific calls into one category and perceived WN as novel. Thus, both the detection of sounds and the identification of call characteristics are accomplished quickly in a specific temporal order, as reflected by ERP components. In addition, the most dynamic ERP patterns appeared in the left mesencephalon and the right telencephalon, indicating the two brain regions might play key roles in anuran vocal communication.
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Xue F, Fang G, Yang P, Zhao E, Brauth SE, Tang Y. The biological significance of acoustic stimuli determines ear preference in the music frog. J Exp Biol 2015; 218:740-7. [PMID: 25740903 DOI: 10.1242/jeb.114694] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Behavioral and neurophysiological studies support the idea that right ear advantage (REA) exists for perception of conspecific vocal signals in birds and mammals. Nevertheless, few studies have focused on anuran species that typically communicate through vocalization. The present study examined the direction and latencies of orientation behaviors in Emei music frogs (Babina daunchina) produced in response to six auditory stimuli emitted by a speaker placed directly behind the subjects. The stimuli included male advertisement calls produced from within burrow nests, which have been shown to be highly sexually attractive (HSA), calls produced from outside burrows, which are of low sexual attractiveness (LSA), screech calls produced when frogs are attacked by snakes, white noise, thunder and silence. For all sound stimuli except the screech, the frogs preferentially turned to the right. Right ear preference was strongest for HSA calls. For the screech and thunder stimuli, there was an increased tendency for subjects to move further from the speaker rather than turning. These results support the idea that in anurans, right ear preference is associated with perception of positive or neutral signals such as the conspecific advertisement call and white noise, while a left ear preference is associated with perception of negative signals such as predatory attack.
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Affiliation(s)
- Fei Xue
- Key laboratory of Bio-resources and Eco-environment, Ministry of Education, School of life sciences, Sichuan University, Chengdu, Sichuan 610064, People's Republic of China Department of Herpetology, Chengdu Institute of Biology, Chinese Academy of Sciences, No.9 Section 4, Renmin South Road, Chengdu, Sichuan 610041, People's Republic of China
| | - Guangzhan Fang
- Department of Herpetology, Chengdu Institute of Biology, Chinese Academy of Sciences, No.9 Section 4, Renmin South Road, Chengdu, Sichuan 610041, People's Republic of China
| | - Ping Yang
- Department of Herpetology, Chengdu Institute of Biology, Chinese Academy of Sciences, No.9 Section 4, Renmin South Road, Chengdu, Sichuan 610041, People's Republic of China
| | - Ermi Zhao
- Key laboratory of Bio-resources and Eco-environment, Ministry of Education, School of life sciences, Sichuan University, Chengdu, Sichuan 610064, People's Republic of China Department of Herpetology, Chengdu Institute of Biology, Chinese Academy of Sciences, No.9 Section 4, Renmin South Road, Chengdu, Sichuan 610041, People's Republic of China
| | - Steven E Brauth
- Department of Psychology, University of Maryland, College Park, MD 20742, USA
| | - Yezhong Tang
- Department of Herpetology, Chengdu Institute of Biology, Chinese Academy of Sciences, No.9 Section 4, Renmin South Road, Chengdu, Sichuan 610041, People's Republic of China
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Fang G, Xue F, Yang P, Cui J, Brauth SE, Tang Y. Right ear advantage for vocal communication in frogs results from both structural asymmetry and attention modulation. Behav Brain Res 2014; 266:77-84. [PMID: 24613236 DOI: 10.1016/j.bbr.2014.02.042] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2013] [Revised: 02/21/2014] [Accepted: 02/24/2014] [Indexed: 11/29/2022]
Abstract
Right-ear/left-hemisphere advantage (REA) in processing species-specific vocalizations has been demonstrated in mammals including humans. Two models for REA are typically proposed, a structural model and an attentional model. These hypotheses were tested in an anuran species, the Emei music frog (Babina daunchina) in which females strongly prefer male calls produced from inside mud-retuse burrows (high sexual attractiveness or HSA calls) to those produced in open fields (low sexual attractiveness or LSA calls). Isochronic playbacks were used to control for attention to stimuli presented to either the left or right sides of female subjects while electroencephalogram (EEG) signals were recorded from the left and right midbrain and telencephalon. The results show that relative EEG power in the delta band declined while those of the alpha and beta bands increased with time in the left but not the right midbrain. Since the anuran midbrain receives auditory information derived primarily from the contralateral auditory nerve, these results support the idea that REA occurs in frogs because communication sounds are processed preferentially in the left midbrain. Furthermore, though differences in the dynamic changes of the delta, alpha and beta bands in the left midbrain between acoustic stimuli were not statistically significant, these changes were stronger during the playback of HSA calls toward which females tend to allocate greater attentional resources. These results imply that REA in frogs results from the combined effects of structural asymmetry and attention modulation.
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Affiliation(s)
- Guangzhan Fang
- Chengdu Institute of Biology, Chinese Academy of Sciences, No. 9 Section 4, Renmin Nan Road, Chengdu, Sichuan 610041, PR China
| | - Fei Xue
- Chengdu Institute of Biology, Chinese Academy of Sciences, No. 9 Section 4, Renmin Nan Road, Chengdu, Sichuan 610041, PR China
| | - Ping Yang
- Chengdu Institute of Biology, Chinese Academy of Sciences, No. 9 Section 4, Renmin Nan Road, Chengdu, Sichuan 610041, PR China
| | - Jianguo Cui
- Chengdu Institute of Biology, Chinese Academy of Sciences, No. 9 Section 4, Renmin Nan Road, Chengdu, Sichuan 610041, PR China
| | - Steven E Brauth
- Department of Psychology, University of Maryland, College Park, MD 20742, USA
| | - Yezhong Tang
- Chengdu Institute of Biology, Chinese Academy of Sciences, No. 9 Section 4, Renmin Nan Road, Chengdu, Sichuan 610041, PR China.
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Electroencephalographic signals synchronize with behaviors and are sexually dimorphic during the light-dark cycle in reproductive frogs. J Comp Physiol A Neuroethol Sens Neural Behav Physiol 2013; 200:117-27. [PMID: 24337372 DOI: 10.1007/s00359-013-0866-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2013] [Revised: 10/19/2013] [Accepted: 10/19/2013] [Indexed: 10/25/2022]
Abstract
Male frogs behave differently from females during the breeding season, particularly with respect to courtship displays and in response to mating signals. In search of physiological correlates of these differences, the present study measured changes in baseline electroencephalogram (EEG) power output within four frequency bands in the telencephalon and mesencephalon, together with changes in locomotor activity as a function of the light-dark cycle in male and female Emei music frogs (Babina daunchina) at the reproductive stage. Previous studies have shown that male vocal activity varies both seasonally and daily in this species and that females use male advertisement calls to locate and select mates. The present results show that both EEG and locomotor activity exhibit highly correlated circadian patterns with peaks around light onset and offset. Importantly, during the reproductive stage, statistically significant sex differences in EEG output across brain regions during the light and dark phases were found indicating that sexual dimorphism exists for EEG activity which may underlie sexually specific information processing and behavioral activities.
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Male vocal competition is dynamic and strongly affected by social contexts in music frogs. Anim Cogn 2013; 17:483-94. [DOI: 10.1007/s10071-013-0680-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2013] [Revised: 08/27/2013] [Accepted: 08/28/2013] [Indexed: 10/26/2022]
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