Individual similarities and differences in eye-movement-related eardrum oscillations (EMREOs).
Level 4 - case-series / case-control
Cross-sectional descriptive physiological study in healthy humans without a control group.
PubMed 37979436 · doi:10.1016/j.heares.2023.108899
What was done
Authors measured eye-movement-related eardrum oscillations (EMREOs) in human subjects with normal hearing thresholds and normal middle ear function to determine which response features are shared versus variable across individuals during saccades.
What was found
In all tested ears with normal hearing: - Measurable EMREOs occurred with a mean of 58.7 dB SPL (range 45–67 dB SPL for large contralateral saccades). - Phase reversal occurred for contralateral- versus ipsilaterally-directed saccades. - Large signal peaks occurred time-locked to both saccade onset and saccade offset. - Saccade duration was encoded in the recorded signal.
Why it matters
This establishes consistent baseline physiological characteristics of saccade-locked eardrum movement in normal-hearing humans, supporting a mechanism of visual-auditory integration in the periphery.
Limits
The abstract does not state sample size (n), participant characteristics, or statistical variance beyond a range. It lacks a comparative group with hearing or motor abnormalities.
Cited by
- supports The eardrum oscillates in precise time-locking with saccadic eye movements, with opposing displacement patterns in the two ears, carrying information about the horizontal and vertical metrics of the saccade.