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Optimizing Noisy Galvanic Vestibular Stimulation Frequency Range for Enhancing Vestibular Perception and Manual Control Performance

22. juli 2026 oppdatert av: National Aeronautics and Space Administration (NASA)

Assessments of Performance in Healthy Control Subjects

This randomized crossover interventional study evaluated the effects of different frequency ranges of noisy galvanic vestibular stimulation (nGVS) on vestibular perception, perceptual motion tracking, and manual control performance in healthy adults. Each participant completed three experimental conditions in randomized order: no stimulation (control), low-frequency nGVS, and high-frequency nGVS. Vestibular perceptual thresholds, perceptual tracking, and manual control performance were assessed during each condition to determine whether stimulation frequency influenced sensorimotor function.

Studieoversikt

Status

Fullført

Forhold

Intervensjon / Behandling

Detaljert beskrivelse

The purpose of this study was to investigate whether the frequency content of noisy galvanic vestibular stimulation influences vestibular perceptual sensitivity, tracking accuracy, and manual control performance. Healthy adult participants completed a randomized crossover protocol in which they received no stimulation, low-frequency nGVS, and high-frequency nGVS during separate experimental conditions within a single study session. Outcome measures included vestibular perceptual thresholds, tracking error rate, and measures of manual control performance. The results were intended to improve understanding of vestibular neuromodulation and inform optimization of nGVS parameters for future aerospace and clinical applications.

Studietype

Intervensjonell

Registrering (Faktiske)

18

Fase

  • Ikke aktuelt

Kontakter og plasseringer

Denne delen inneholder kontaktinformasjon for de som utfører studien, og informasjon om hvor denne studien blir utført.

Studiesteder

  • Forente stater
    • Texas
      • Houston, Texas, Forente stater, 77058
        • Nasa Jsc B21

Deltakelseskriterier

Forskere ser etter personer som passer til en bestemt beskrivelse, kalt kvalifikasjonskriterier. Noen eksempler på disse kriteriene er en persons generelle helsetilstand eller tidligere behandlinger.

Kvalifikasjonskriterier

Alder som er kvalifisert for studier

  • Voksen
  • Eldre voksen

Tar imot friske frivillige

Ja

Beskrivelse

Inclusion Criteria:

  • Subjects were required to pass a physical exam adminisitrated by NASA JSC Clinic.

Exclusion Criteria:

  • No history of neurologic, vestibular, or autonomic disease.

Studieplan

Denne delen gir detaljer om studieplanen, inkludert hvordan studien er utformet og hva studien måler.

Hvordan er studiet utformet?

Designdetaljer

  • Primært formål: Grunnvitenskap
  • Tildeling: Randomisert
  • Intervensjonsmodell: Crossover-oppdrag
  • Masking: Enkelt

Våpen og intervensjoner

Deltakergruppe / Arm
Intervensjon / Behandling
Ingen inngripen: Control - No noisy galvanic vestibular stimulation
Participants completed testing without noisy galvanic vestibular stimulation.
Eksperimentell: Low-frequency noisy galvanic vestibular stimulation
Participants received low-frequency noisy galvanic vestibular stimulation during testing. Low frequency was 0-2 Hz.
Enhet: Low-frequency noisy galvanic vestibular stimulation (nGVS)
Participants received low-frequency noisy galvanic vestibular stimulation through electrodes placed over the bilateral mastoid processes during experimental testing. Stimulation parameters were consistent with the approved study protocol. Frequency was 0-2Hz white noise, 300uA amplitude.
Eksperimentell: High-frequency noisy galvanic vestibular stimulation
Participants received high-frequency noisy galvanic vestibular stimulation during testing. High-frequency was 10-30 Hz.
Enhet: High-frequency noisy galvanic vestibular stimulation (nGVS)
Participants received high-frequency noisy galvanic vestibular stimulation through electrodes placed over the bilateral mastoid processes during experimental testing. Stimulation parameters were consistent with the approved study protocol. Frequency was 10-30Hz white noise, 300uA amplitude.

Hva måler studien?

Primære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
Vestibular Direction Recognition Threshold
Tidsramme: Day 1 (single study visit): Participants completed outcome assessments during each randomized intervention condition (No nGVS, Low-Frequency nGVS, and High-Frequency nGVS). Each assessment required approximately 5 minutes to complete.
Vestibular perceptual sensitivity was assessed using roll-tilt and interaural translation direction recognition tasks performed on a six-degree-of-freedom motion platform. Direction recognition thresholds were estimated from participant responses using an adaptive three-down, one-up staircase procedure and cumulative Gaussian psychometric curve fitting. Lower threshold values indicate greater vestibular sensitivity and improved perception of self-motion.
Day 1 (single study visit): Participants completed outcome assessments during each randomized intervention condition (No nGVS, Low-Frequency nGVS, and High-Frequency nGVS). Each assessment required approximately 5 minutes to complete.
Perceptual Motion Tracking Accuracy
Tidsramme: Day 1 (single study visit): Participants completed outcome assessments during each randomized intervention condition (No nGVS, Low-Frequency nGVS, and High-Frequency nGVS). Each assessment required approximately 5 minutes to complete.
Perceptual motion tracking performance was evaluated during continuous pseudorandom roll motion. Participants used a joystick to continuously indicate their perceived direction and magnitude of platform motion. Performance was quantified using the root mean square error (RMSE) between joystick responses and the programmed motion stimulus, with lower RMSE values indicating more accurate perception and tracking of self-motion.
Day 1 (single study visit): Participants completed outcome assessments during each randomized intervention condition (No nGVS, Low-Frequency nGVS, and High-Frequency nGVS). Each assessment required approximately 5 minutes to complete.
Manual Control Nulling Accuracy
Tidsramme: Day 1 (single study visit): Participants completed outcome assessments during each randomized intervention condition (No nGVS, Low-Frequency nGVS, and High-Frequency nGVS). Each assessment required approximately 5 minutes to complete.
Manual control performance was evaluated during continuous pseudorandom roll motion while participants used a joystick to actively minimize platform motion by generating corrective control inputs. Performance was quantified using the root mean square error (RMSE) between the platform tilt angle and the upright position over time. Lower RMSE values indicate more effective manual control and disturbance rejection.
Day 1 (single study visit): Participants completed outcome assessments during each randomized intervention condition (No nGVS, Low-Frequency nGVS, and High-Frequency nGVS). Each assessment required approximately 5 minutes to complete.

Sekundære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
Roll-Tilt Vestibular Direction Recognition Threshold
Tidsramme: Day 1 (single study visit): Participants completed outcome assessments during each randomized intervention condition (No nGVS, Low-Frequency nGVS, and High-Frequency nGVS). Each assessment required approximately 5 minutes to complete.
Vestibular perceptual threshold for roll-tilt motion was measured using a computerized three-down, one-up adaptive staircase procedure during a 1 Hz sinusoidal motion stimulus. Thresholds were estimated by fitting a cumulative Gaussian psychometric function to participants' left/right direction recognition responses. Lower threshold values indicate greater vestibular sensitivity.
Day 1 (single study visit): Participants completed outcome assessments during each randomized intervention condition (No nGVS, Low-Frequency nGVS, and High-Frequency nGVS). Each assessment required approximately 5 minutes to complete.
Interaural Translation Vestibular Direction Recognition Threshold
Tidsramme: Day 1 (single study visit): Participants completed outcome assessments during each randomized intervention condition (No nGVS, Low-Frequency nGVS, and High-Frequency nGVS). Each assessment required approximately 5 minutes to complete.
Vestibular perceptual threshold for interaural translation motion was measured using a computerized three-down, one-up adaptive staircase procedure during a 1 Hz sinusoidal motion stimulus. Thresholds were estimated by fitting a cumulative Gaussian psychometric function to participants' left/right direction recognition responses. Lower threshold values indicate greater vestibular sensitivity.
Day 1 (single study visit): Participants completed outcome assessments during each randomized intervention condition (No nGVS, Low-Frequency nGVS, and High-Frequency nGVS). Each assessment required approximately 5 minutes to complete.
Vestibular Direction Recognition Bias
Tidsramme: Day 1 (single study visit): Participants completed outcome assessments during each randomized intervention condition (No nGVS, Low-Frequency nGVS, and High-Frequency nGVS). Each assessment required approximately 5 minutes to complete.
Response bias during the vestibular direction recognition task was estimated from the mean of the cumulative Gaussian psychometric function. Bias represents the stimulus magnitude at which participants were equally likely to perceive motion in either direction, providing a measure of systematic perceptual offset.
Day 1 (single study visit): Participants completed outcome assessments during each randomized intervention condition (No nGVS, Low-Frequency nGVS, and High-Frequency nGVS). Each assessment required approximately 5 minutes to complete.
Perceptual Motion Tracking Variability
Tidsramme: Day 1 (single study visit): Participants completed outcome assessments during each randomized intervention condition (No nGVS, Low-Frequency nGVS, and High-Frequency nGVS). Each assessment required approximately 5 minutes to complete.
Variability of perceptual motion tracking performance during continuous pseudorandom roll motion. Tracking variability was quantified using statistical measures including standard deviation and variance of tracking performance, providing an assessment of the consistency and precision of participant responses.
Day 1 (single study visit): Participants completed outcome assessments during each randomized intervention condition (No nGVS, Low-Frequency nGVS, and High-Frequency nGVS). Each assessment required approximately 5 minutes to complete.
Manual Control Nulling Variability
Tidsramme: Day 1 (single study visit): Participants completed outcome assessments during each randomized intervention condition (No nGVS, Low-Frequency nGVS, and High-Frequency nGVS). Each assessment required approximately 5 minutes to complete.
Variability of manual control performance during the nulling task was quantified using standard deviation, variance, and mean absolute deviation of chair tilt relative to the upright position. These measures assessed the consistency and precision of participants' ability to minimize platform motion.
Day 1 (single study visit): Participants completed outcome assessments during each randomized intervention condition (No nGVS, Low-Frequency nGVS, and High-Frequency nGVS). Each assessment required approximately 5 minutes to complete.

Samarbeidspartnere og etterforskere

Det er her du vil finne personer og organisasjoner som er involvert i denne studien.

Sponsor

National Aeronautics and Space Administration (NASA)

Etterforskere

  • Hovedetterforsker: Scott J Wood, PhD, National Aeronautics and Space Administration (NASA)

Studierekorddatoer

Disse datoene sporer fremdriften for innsending av studieposter og sammendragsresultater til ClinicalTrials.gov. Studieposter og rapporterte resultater gjennomgås av National Library of Medicine (NLM) for å sikre at de oppfyller spesifikke kvalitetskontrollstandarder før de legges ut på det offentlige nettstedet.

Studer hoveddatoer

Studiestart (Faktiske)

19. februar 2024

Primær fullføring (Faktiske)

18. mars 2024

Studiet fullført (Faktiske)

18. mars 2024

Datoer for studieregistrering

Først innsendt

15. juli 2026

Først innsendt som oppfylte QC-kriteriene

22. juli 2026

Først lagt ut (Faktiske)

28. juli 2026

Oppdateringer av studieposter

Sist oppdatering lagt ut (Faktiske)

28. juli 2026

Siste oppdatering sendt inn som oppfylte QC-kriteriene

22. juli 2026

Sist bekreftet

1. juli 2026

Mer informasjon

Begreper knyttet til denne studien

Andre studie-ID-numre

  • eIRB Study 0530

Plan for individuelle deltakerdata (IPD)

Planlegger du å dele individuelle deltakerdata (IPD)?

JA

IPD-planbeskrivelse

De-identified individual participant data underlying the results reported in the publication, including vestibular threshold measurements, perceptual motion tracking data, manual control performance data, and associated analysis code, will be made available upon reasonable request to the corresponding author. Additional study documents, including the study protocol, statistical analysis plan, and data dictionary, will also be available to support reproducibility. Data sharing will be subject to applicable institutional policies, IRB requirements, and any NASA data-sharing requirements in effect at the time of the request.

IPD-delingstidsramme

For at least five years following publication.

Tilgangskriterier for IPD-deling

Data can be requested through the NASA Life Sciences Portal (https://www.nasa.gov/hrp/nlsp/).

IPD-deling Støtteinformasjonstype

  • STUDY_PROTOCOL
  • SEVJE
  • ANALYTIC_CODE

Legemiddel- og utstyrsinformasjon, studiedokumenter

Studerer et amerikansk FDA-regulert medikamentprodukt

Nei

Studerer et amerikansk FDA-regulert enhetsprodukt

Nei

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