Optimizing Noisy Galvanic Vestibular Stimulation Frequency Range for Enhancing Vestibular Perception and Manual Control Performance
Assessments of Performance in Healthy Control Subjects
Studie Overzicht
Toestand
Toestand
Conditie
Conditie
Interventie / Behandeling
Interventie / Behandeling
Gedetailleerde beschrijving
Studietype
Studietype
Inschrijving (Werkelijk)
Inschrijving
Fase
Fase
- Niet toepasbaar
Contacten en locaties
Studie Locaties
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Texas
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Houston, Texas, Verenigde Staten, 77058
- Nasa Jsc B21
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Deelname Criteria
Geschiktheidscriteria
Geschiktheidscriteria
Leeftijden die in aanmerking komen voor studie
- Volwassen
- Oudere volwassene
Accepteert gezonde vrijwilligers
Beschrijving
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.
Studie plan
Hoe is de studie opgezet?
Ontwerpdetails
- Primair doel: Fundamentele wetenschap
- Toewijzing: Gerandomiseerd
- Interventioneel model: Crossover-opdracht
- Masker: Enkel
Aantal wapens
Wapens en interventies
Deelnemersgroep / ArmDeelnemersgroep / Arm |
Interventie / BehandelingInterventie / Behandeling |
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Geen tussenkomst: Control - No noisy galvanic vestibular stimulation
Participants completed testing without noisy galvanic vestibular stimulation.
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Experimenteel: Low-frequency noisy galvanic vestibular stimulation
Participants received low-frequency noisy galvanic vestibular stimulation during testing.
Low frequency was 0-2 Hz.
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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.
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Experimenteel: High-frequency noisy galvanic vestibular stimulation
Participants received high-frequency noisy galvanic vestibular stimulation during testing.
High-frequency was 10-30 Hz.
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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.
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Wat meet het onderzoek?
Primaire uitkomstmaten
Primaire uitkomstmaten
Uitkomstmaat |
Maatregel Beschrijving |
Tijdsspanne |
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Vestibular Direction Recognition Threshold
Tijdsspanne: 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.
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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.
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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.
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Perceptual Motion Tracking Accuracy
Tijdsspanne: 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.
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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.
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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.
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Manual Control Nulling Accuracy
Tijdsspanne: 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.
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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.
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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.
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Secundaire uitkomstmaten
Secundaire uitkomstmaten
Uitkomstmaat |
Maatregel Beschrijving |
Tijdsspanne |
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Roll-Tilt Vestibular Direction Recognition Threshold
Tijdsspanne: 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.
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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.
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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.
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Interaural Translation Vestibular Direction Recognition Threshold
Tijdsspanne: 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.
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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.
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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.
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Vestibular Direction Recognition Bias
Tijdsspanne: 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.
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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.
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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.
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Perceptual Motion Tracking Variability
Tijdsspanne: 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.
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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.
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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.
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Manual Control Nulling Variability
Tijdsspanne: 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.
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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.
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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.
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Medewerkers en onderzoekers
Sponsor
Sponsor
Onderzoekers
Onderzoekers
- Hoofdonderzoeker: Scott J Wood, PhD, National Aeronautics and Space Administration (NASA)
Studie record data
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Studie start (Werkelijk)
Studie start
Primaire voltooiing (Werkelijk)
Primaire voltooiing
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Studie voltooiing
Studieregistratiedata
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Updates van studierecords
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Meer informatie
Termen gerelateerd aan deze studie
Andere studie-ID-nummers
Andere studie-ID-nummers
- eIRB Study 0530
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