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Subcutaneous cortical auditory evoked potentials in echolocating bats.

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Title: Subcutaneous cortical auditory evoked potentials in echolocating bats.
Authors: Fouhy, Victoria1 (AUTHOR) vlightfoot@tamu.edu, Ellis, Sam1 (AUTHOR), Smotherman, Michael1 (AUTHOR)
Source: Journal of the Acoustical Society of America. Oct2025, Vol. 158 Issue 4, p3390-3399. 10p.
Subjects: Auditory cortex, Bats, Neural inhibition, Auditory evoked response, Auditory perception, Neural pathways
Abstract: Auditory brainstem responses offer a convenient non-invasive method for assessing auditory system physiology, but mainly reveal activation of early brainstem and midbrain processing stages. With minor adjustments, the method can also capture slower cortical auditory evoked potentials (CAEPs). CAEPs have not been previously described in bats but are often used in large animals and humans to study cortical signal processing. Here, we describe two late peaks in the bat (Tadarida brasiliensis) auditory evoked potential waveform that appear cortical in origin. The first deflection (P1) peaked at 23 ms and showed the same onset (∼10 ms) and duration (∼20 ms) as ensemble neuronal activity in the auditory cortex under matched conditions. A second, smaller wave (P2) peaked at 37 ms, correlating with evoked activity in a secondary auditory region known as the frontal auditory field. Both peaks varied in amplitude and timing depending on acoustic stimulus properties. Notably, P1 was reduced at presentation rates above 8 Hz, consistent with predicted effects of cortical forward suppression. These findings demonstrate that robust CAEPs can be non-invasively recorded in bats and carry information about stimulus features and underlying neural mechanisms. [ABSTRACT FROM AUTHOR]
Copyright of Journal of the Acoustical Society of America is the property of American Institute of Physics and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 189039826
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Subcutaneous cortical auditory evoked potentials in echolocating bats.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Fouhy%2C+Victoria%22">Fouhy, Victoria</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> vlightfoot@tamu.edu</i><br /><searchLink fieldCode="AR" term="%22Ellis%2C+Sam%22">Ellis, Sam</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Smotherman%2C+Michael%22">Smotherman, Michael</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+the+Acoustical+Society+of+America%22">Journal of the Acoustical Society of America</searchLink>. Oct2025, Vol. 158 Issue 4, p3390-3399. 10p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Auditory+cortex%22">Auditory cortex</searchLink><br /><searchLink fieldCode="DE" term="%22Bats%22">Bats</searchLink><br /><searchLink fieldCode="DE" term="%22Neural+inhibition%22">Neural inhibition</searchLink><br /><searchLink fieldCode="DE" term="%22Auditory+evoked+response%22">Auditory evoked response</searchLink><br /><searchLink fieldCode="DE" term="%22Auditory+perception%22">Auditory perception</searchLink><br /><searchLink fieldCode="DE" term="%22Neural+pathways%22">Neural pathways</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Auditory brainstem responses offer a convenient non-invasive method for assessing auditory system physiology, but mainly reveal activation of early brainstem and midbrain processing stages. With minor adjustments, the method can also capture slower cortical auditory evoked potentials (CAEPs). CAEPs have not been previously described in bats but are often used in large animals and humans to study cortical signal processing. Here, we describe two late peaks in the bat (Tadarida brasiliensis) auditory evoked potential waveform that appear cortical in origin. The first deflection (P1) peaked at 23 ms and showed the same onset (∼10 ms) and duration (∼20 ms) as ensemble neuronal activity in the auditory cortex under matched conditions. A second, smaller wave (P2) peaked at 37 ms, correlating with evoked activity in a secondary auditory region known as the frontal auditory field. Both peaks varied in amplitude and timing depending on acoustic stimulus properties. Notably, P1 was reduced at presentation rates above 8 Hz, consistent with predicted effects of cortical forward suppression. These findings demonstrate that robust CAEPs can be non-invasively recorded in bats and carry information about stimulus features and underlying neural mechanisms. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of the Acoustical Society of America is the property of American Institute of Physics and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1121/10.0039659
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 10
        StartPage: 3390
    Subjects:
      – SubjectFull: Auditory cortex
        Type: general
      – SubjectFull: Bats
        Type: general
      – SubjectFull: Neural inhibition
        Type: general
      – SubjectFull: Auditory evoked response
        Type: general
      – SubjectFull: Auditory perception
        Type: general
      – SubjectFull: Neural pathways
        Type: general
    Titles:
      – TitleFull: Subcutaneous cortical auditory evoked potentials in echolocating bats.
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            NameFull: Fouhy, Victoria
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            NameFull: Ellis, Sam
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            NameFull: Smotherman, Michael
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            – D: 01
              M: 10
              Text: Oct2025
              Type: published
              Y: 2025
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            – TitleFull: Journal of the Acoustical Society of America
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