Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Changes in cochlear mechanics during vocalization: evidence for a phasic medial efferent effect

R L Goldberg1, O W Henson

  • 1Department of Cell Biology and Anatomy, Chapel Hill, NC 27599, USA.

Hearing Research
|August 26, 1998
PubMed
Summary

Mustached bats exhibit cochlear damping changes during vocalizations, reducing decay time (DT). The medial olivocochlear (MOC) system influences this suppression, potentially as a synkinetic effect preceding vocalization.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Pathology-based staging for HPV-positive squamous carcinoma of the oropharynx.

Oral oncology·2016
Same author

Chondrocyte culture and assay.

Current protocols in pharmacology·2011
Same author

High-resolution in situ imaging of cochlear implant electrode arrays in cat temporal bones using Tuned Aperture Computed Tomography (TACT).

Ear and hearing·2007
Same author

Optimization of TACT imaging protocols for in situ visualization of cochlear electrode arrays in cat temporal bones.

Ear and hearing·2007
Same author

Use of Web-based materials to enhance anatomy instruction in the health sciences.

Anatomical record. Part B, New anatomist·2006
Same author

Smooth muscle in the annulus fibrosus of the tympanic membrane in bats, rodents, insectivores, and humans.

Hearing research·2005

Area of Science:

  • Auditory Neuroscience
  • Bioacoustics
  • Mammalian Physiology

Background:

  • The mustached bat's cochlea exhibits resonant ringing in response to acoustic stimuli.
  • Cochlear mechanics can be studied by measuring decay time (DT) and frequency of damped oscillations from cochlear microphonic potential (CM).
  • Understanding cochlear responses during natural behaviors like vocalization is crucial.

Purpose of the Study:

  • To investigate phasic changes in cochlear mechanics (DT and cochlear resonance frequency - CRF) during vocalizations in the mustached bat.
  • To determine the role of the medial olivocochlear (MOC) efferent system in modulating these changes.

Main Methods:

  • Chronic electrode implantation in three mustached bats (Pteronotus p. parnellii).
  • Recording CM in response to 1-2 ms tone pips presented every 200 ms.

Related Experiment Videos

  • Measuring DT and CRF from CM, synchronized with bat vocalizations via microphone monitoring.
  • Administering gentamicin to assess the MOC system's involvement.

    • Main Results:

    • Cochlear DT significantly decreased (by 46%) during vocalizations, indicating increased damping.
    • DT changes sometimes preceded vocalizations, and CRF also varied unpredictably during vocalizations.
    • Gentamicin administration reduced, but did not eliminate, the DT decrease during vocalization, implicating the MOC system.

    Conclusions:

    • Phasic changes in cochlear damping occur in synchrony with bat vocalizations.
    • The MOC system plays a role in suppressing cochlear responses during vocalization.
    • Pre-vocalization suppression suggests a synkinetic neural effect coordinating vocalization and auditory system changes.