Utricular Compound Action Potential Thresholds to Pulsed Interaural Vibration in Guinea Pig, and Mechanical Tuning Curve Estimates in Mouse, Rat, Sheep, and Human

Determine thresholds of vestibular compound action potentials (vCAPs) evoked by pulsed interaural bone-conducted vibration (BCV) and estimate synchronization tuning curves for sinusoidal BCV and stapes vibration (SV) in multiple mammalian species.

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✦ The floor

Discussion

Signed responses from readers of the wire.

✦ Clinical Takeaway ✦

No actionable change — this is a basic science, multi-species study characterizing utricular physiology; findings may eventually inform bone-conducted vestibular evoked potential testing but have no immediate clinical application.

✦ Why It Matters ✦

Understanding utricular response thresholds and mechanical tuning across species lays important groundwork for refining bone-conduction-based vestibular diagnostic tests in humans.

✦ Key Points ✦

01Utricular compound action potential (CAP) thresholds to pulsed interaural bone-conducted vibration were measured in guinea pigs.
02Mechanical tuning curve estimates were derived across four species: mouse, rat, sheep, and human.
03Multi-species comparison allows extrapolation toward human vestibular physiology.
04Published in Journal of the Association for Research in Otolaryngology (JARO), 2026.
05Findings are foundational/basic science with no immediate clinical translation.

✦ Claims & Evidence ✦

ClaimEvidenceSupport

Utricular compound action potential thresholds to pulsed interaural bone-conducted vibration can be measured in guinea pigs.

studysupported

Mechanical synchronization tuning curves for the utricle differ across mouse, rat, sheep, and human.

studypartially supported

✦ Research metadata ✦

PMID: 42745105
DOI: 10.1007/s10162-026-01070-y.
Journal: Journal of the Association for Research in Otolaryngology
Publication type: research_article
Evidence level: 4
Population: Guinea pig, mouse, rat, sheep, and human inner ear preparations
Intervention: Pulsed interaural bone-conducted vibration applied to measure utricular compound action potentials
Comparator: Cross-species comparison (mouse, rat, sheep, human)

Primary outcomes

Utricular compound action potential thresholds in guinea pig; Mechanical tuning curve estimates across mouse, rat, sheep, and human

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