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Related Concept Videos

The Cochlea01:13

The Cochlea

The cochlea is a coiled structure in the inner ear that contains hair cells—the sensory receptors of the auditory system. Sound waves are transmitted to the cochlea by small bones attached to the eardrum called the ossicles, which vibrate the oval window that leads to the inner ear. This causes fluid in the chambers of the cochlea to move, vibrating the basilar membrane.
Auditory Pathway01:15

Auditory Pathway

Auditory pathways constitute the complex neural circuits responsible for transmitting and interpreting auditory information from the peripheral auditory system to the brain. Sound waves are initially captured by the outer ear, funneled through the ear canal, and reach the tympanic membrane (eardrum). These vibrations are transmitted via the middle ear's ossicles to the inner ear's cochlea.
When viewed cross-sectionally, the cochlea reveals the scala vestibuli and scala tympani flanking the...

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Data Acquisition and Analysis In Brainstem Evoked Response Audiometry In Mice
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Binaural interaction in auditory evoked potentials: brainstem, middle- and long-latency components

D L McPherson1, A Starr

  • 1Hearing and Speech Sciences Laboratory, Brigham Young University, Provo, Utah 84602.

Hearing Research
|March 1, 1993
PubMed
Summary

Binaural interaction in auditory evoked potentials involves amplitude reduction, particularly in middle-latency components. This suggests inhibitory processes are key to how the brain processes sound from both ears.

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Area of Science:

  • Neuroscience
  • Auditory Neuroscience
  • Evoked Potentials Research

Background:

  • Binaural interaction is crucial for auditory processing, occurring when monaural auditory evoked potentials do not sum to binaural potentials.
  • Understanding binaural interaction aids in deciphering auditory pathway function.

Purpose of the Study:

  • To investigate binaural interaction across early, middle, and long-latency auditory evoked potentials.
  • To quantify the amplitude reduction and temporal characteristics of binaural interaction.

Main Methods:

  • Studied binaural interaction in 17 healthy young adults using auditory evoked potentials.
  • Analyzed early (0-10 ms), middle (10-50 ms), and long-latency (50-200 ms) components.

Main Results:

  • Maximal binaural interaction reduced amplitude by 21% (early), 48% (middle), and 38% (long-latency) at specific latencies.
  • Interaction effects were long-lasting, extending from milliseconds to tens of milliseconds.
  • Binaural interaction primarily involves amplitude reduction, indicating inhibitory processes.

Conclusions:

  • Binaural processing is most prominent in the middle-latency range, associated with thalamo-cortical activity.
  • Evoked potential analysis reveals inhibitory mechanisms underlying binaural interaction.
  • Binaural interaction significantly impacts auditory evoked potential amplitudes across different latency ranges.