Ontogeny of auditory brainstem responses in the bat, Phyllostomus discolor

Linnenschmidt, Meike; Wiegrebe, Lutz

doi:10.1016/j.heares.2018.12.010

Cited by 21 publications

(31 citation statements)

References 31 publications

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“…We evaluated our ABR signals quantitatively and objectively in accordance with previous experiments using the same experimental set-up [32]. The amplitudes of the recorded ABRs were calculated as the root-mean square (RMS) in the time window starting directly after the stimulus presentation and lasting for the duration of the ABR signal (i.e.…”

Section: (C) Auditory Brainstem Response Data Analysismentioning

confidence: 99%

“…1-8 ms after stimulus onset). The RMS of the full signal was used in order to evade unreliability from individual waveform discrimination [33,34] and to increase comparability with the recent literature [32,35]. Bootstrap analyses (n = 500; 95% confidence) were performed on the ABR data to statistically verify the presence of an ABR signal [36].…”

Section: (C) Auditory Brainstem Response Data Analysismentioning

confidence: 99%

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Hearing sensitivity and amplitude coding in bats are differentially shaped by echolocation calls and social calls

et al. 2021

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Differences in auditory perception between species are influenced by phylogenetic origin and the perceptual challenges imposed by the natural environment, such as detecting prey- or predator-generated sounds and communication signals. Bats are well suited for comparative studies on auditory perception since they predominantly rely on echolocation to perceive the world, while their social calls and most environmental sounds have low frequencies. We tested if hearing sensitivity and stimulus level coding in bats differ between high and low-frequency ranges by measuring auditory brainstem responses (ABRs) of 86 bats belonging to 11 species. In most species, auditory sensitivity was equally good at both high- and low-frequency ranges, while amplitude was more finely coded for higher frequency ranges. Additionally, we conducted a phylogenetic comparative analysis by combining our ABR data with published data on 27 species. Species-specific peaks in hearing sensitivity correlated with peak frequencies of echolocation calls and pup isolation calls, suggesting that changes in hearing sensitivity evolved in response to frequency changes of echolocation and social calls. Overall, our study provides the most comprehensive comparative assessment of bat hearing capacities to date and highlights the evolutionary pressures acting on their sensory perception.

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Section: (C) Auditory Brainstem Response Data Analysismentioning

confidence: 99%

Section: (C) Auditory Brainstem Response Data Analysismentioning

confidence: 99%

Hearing sensitivity and amplitude coding in bats are differentially shaped by echolocation calls and social calls

et al. 2021

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“…In budgerigars ( Melopsittacus undulatus ), hearing is poor at hatching, and thresholds improve markedly in the first week; by 1 week before fledging, ABR audiograms of young budgerigars are very similar to those of adult birds [11]. In some mammals, hearing sensitivity is weak at birth and gradually develops during the first weeks of life [38, 39], although other species, such as Phyllostomus discolor bats [13] and humans [40], have a well-developed auditory system at birth and even before birth. Our findings for T. scripta elegans , which include hysteresis in ontogenetic auditory development, therefore differ from those reported in other vertebrates.…”

Section: Discussionmentioning

confidence: 99%

“…Developmental plasticity of hearing sensitivity has been verified in fishes [6, 7], frogs [8], lizards [9], birds [10, 11], mammals [12, 13], and humans [14], suggesting that auditory processing matures with age, and that this process differs between species. Turtles, like other amphibious animals, face a trade-off between terrestrial and aquatic hearing, and their acoustic environment changes during ontogeny; they may have evolved variability in hearing capacity to adapt to complex environments [15, 16].…”

Section: Introductionmentioning

confidence: 99%

Developmental plasticity of hearing sensitivity in red-eared sliderTrachemys scripta elegans

Wang

et al. 2019

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“…Phyllostomus discolor is well established as an animal model for behavioral and neurobiological research on echolocation and social communication. The peripheral and central auditory system, the vocal motor system and the visual system of Phyllostomus discolor have been the subject of intense research over the last decades (peripheral and central auditory system: Bartenstein et al 2014 ; Esser and Kiefer 1996 ; Firzlaff et al 2007 ; Firzlaff and Schuller 2003 ; Goerlitz et al 2008 ; Greiter and Firzlaff 2017a , b ; Heinrich et al 2011 ; Hoffmann et al 2008a , b ; Linnenschmidt and Wiegrebe 2019 ; Vanderelst et al 2010 ; vocal motor system: Fenzl and Schuller 2002 ; Fenzl and Schuller 2005 ; visual system: Hoffmann et al 2016 , 2019 ; Kugler et al 2019 ; Rother and Schmidt 1982 ). However, as no brain atlas for Phyllostomus discolor has previously been published, only one of the earlier studies mentioned above involved neuroanatomy beyond basic localization of recording sites.…”

Section: Introductionmentioning

confidence: 99%

Cyto- and myeloarchitectural brain atlas of the pale spear-nosed bat (Phyllostomus discolor) in CT Aided Stereotaxic Coordinates

et al. 2020

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The pale spear-nosed bat Phyllostomus discolor, a microchiropteran bat, is well established as an animal model for research on the auditory system, echolocation and social communication of species-specific vocalizations. We have created a brain atlas of Phyllostomus discolor that provides high-quality histological material for identification of brain structures in reliable stereotaxic coordinates to strengthen neurobiological studies of this key species. The new atlas combines high-resolution images of frontal sections alternately stained for cell bodies (Nissl) and myelinated fibers (Gallyas) at 49 rostrocaudal levels, at intervals of 350 µm. To facilitate comparisons with other species, brain structures were named according to the widely accepted Paxinos nomenclature and previous neuroanatomical studies of other bat species. Outlines of auditory cortical fields, as defined in earlier studies, were mapped onto atlas sections and onto the brain surface, together with the architectonic subdivisions of the neocortex. X-ray computerized tomography (CT) of the bat’s head was used to establish the relationship between coordinates of brain structures and the skull. We used profile lines and the occipital crest as skull landmarks to line up skull and brain in standard atlas coordinates. An easily reproducible protocol allows sectioning of experimental brains in the standard frontal plane of the atlas. An electronic version of the atlas plates and supplementary material is available from 10.12751/g-node.8bbcxy

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Ontogeny of auditory brainstem responses in the bat, Phyllostomus discolor

Cited by 21 publications

References 31 publications

Hearing sensitivity and amplitude coding in bats are differentially shaped by echolocation calls and social calls

Hearing sensitivity and amplitude coding in bats are differentially shaped by echolocation calls and social calls

Developmental plasticity of hearing sensitivity in red-eared sliderTrachemys scripta elegans

Cyto- and myeloarchitectural brain atlas of the pale spear-nosed bat (Phyllostomus discolor) in CT Aided Stereotaxic Coordinates

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