Dizziness Clinical Trial
Official title:
Vestibular Precision: Physiology & Pathophysiology
This project will investigate the role of noise in the vestibular system, and in particular its effects on the variability (precision) of vestibular-mediated behaviors. The investigators will study vestibular precision in normal subjects and patients with peripheral vestibular damage, and will investigate its potential plasticity. The goals are to develop a better understanding of the role noise plays in the vestibular system in normal and pathologic populations, and to determine if the brain can learn to improve signal recognition within its inherently noisy neural environment, which would result in improved behavioral precision.
The goal of this study is to investigate vestibular precision by quantifying the variability in behavioral responses that result from the neural noise inherent to the peripheral and central vestibular systems. Because neural noise contaminates the signals that are transduced by the ear and processed by the brain, vestibular-mediated behavioral responses vary even when identical stimuli are provided. In this study, the investigators focus on vestibular precision in human subjects and investigate its sources, its effects on behavior, and its degradation when the periphery is damaged and its potential plasticity. Specifically, the investigators will investigate: (1) Vestibular precision in normal subjects - physiology: A) The investigators will measure the angular and linear vestibulo-ocular reflex (VOR) using novel motion combinations that reinforce or cancel eye movement responses, which will allow us to determine the distribution and magnitude of noise produced in the sensory (canal, otolith) pathways and in the oculomotor pathway. The investigators hypothesize that normal subjects will demonstrate a bimodal distribution of noise with either sensory or motor predominance, and that subjects with more sensory noise will demonstrate other behavioral characteristics that reflect this characteristic (e.g., higher perceptual thresholds); and B) The investigators will assay vestibular noise from trial-trial variations in the VOR and will compare VOR dynamics with those predicted by a Bayesian model using the assayed noise. The investigators predict variations in VOR dynamics across subjects, age and stimulus amplitudes will be consistent with Bayesian processing of noise. Potential confounding factors will be carefully controlled, including attention, fatigue, and non-vestibular cues. (2) Vestibular precision after peripheral damage - pathophysiology: A) The investigators will examine the changes in vestibular precision that occur when one vestibular nerve is damaged (by a vestibular schwannoma, VS) and after the damaged nerve is surgically sectioned, and will investigate if precision measurements can provide evidence of pathologic noise produced by the damaged nerve and therefore help predict clinical outcome when the nerve is sectioned. The investigators hypothesize that changes in signal reliability due to the VS will be traceable to both the reduced redundancy caused by loss of afferent fibers and to aberrant noise generated by the damaged vestibular nerve and that changes in precision after neurectomy will correlate the outcome measures that characterize patient disability; and B) The investigators will examine the plasticity of vestibular precision in the oculomotor and perceptual realms with the goal of determining if precision can be improved. Using novel training approaches that provide challenging signal extraction tasks, the investigators hypothesize that participants will improve their vestibular precision on the trained task. As secondary outcome measures, the investigators will determine if training one behavior generalizes to the non-trained behavior and if patient's symptoms are affected by improved precision. ;
Status | Clinical Trial | Phase | |
---|---|---|---|
Enrolling by invitation |
NCT04196933 -
Analysis of Vestibular Compensation Following Clinical Intervention for Vestibular Schwannoma
|
N/A | |
Completed |
NCT05427097 -
Thermal Energy in the Treatment of Cervicogenic Dizziness
|
N/A | |
Completed |
NCT02299128 -
Effectiveness of Early Physical Therapy Intervention for Patients With Dizziness After a Sports-Related Concussion
|
N/A | |
Completed |
NCT02733549 -
Is The Sudden Onset of Dizziness A Symptom of Acute Liver Dysfunction?
|
N/A | |
Completed |
NCT05812209 -
Stellate Ganglion Block to Treat Long COVID 19 Case Series
|
||
Not yet recruiting |
NCT03973658 -
Dizziness Among First Time Users of Hearing Aids
|
||
Completed |
NCT03182868 -
Vestibular Testing: Consistency and Effects Over Time
|
N/A | |
Completed |
NCT02938221 -
Telemedical Examination of a Three-Component Oculomotor Testing Battery
|
N/A | |
Active, not recruiting |
NCT02655575 -
Assessment and Treatment of Patients With Long-term Dizziness in Primary Care
|
N/A | |
Completed |
NCT02772042 -
Traction Manipulation of Upper Cervical Spine on Cervicogenic Dizziness
|
N/A | |
Completed |
NCT00732797 -
A Trial of Booklet Based Self Management of Dizziness
|
N/A | |
Not yet recruiting |
NCT06010550 -
Validating a Clinical Decision Support Tool for Stratifying Stroke Risk for Dizziness/Vertigo
|
||
Recruiting |
NCT03618199 -
Efficacy of a Transcranial Vibrating System for Minimizing Dizziness During Caloric Testing
|
N/A | |
Completed |
NCT03330262 -
Head-Mounted Vibrotactile Prosthesis for Patients With Chronic Postural Instability
|
N/A | |
Completed |
NCT05157399 -
Quantification of the Effect of the OtoBand on Objective Measures of Vertigo and Dizziness
|
N/A | |
Completed |
NCT02344446 -
Physical Therapy Intervention for Extended Physical Symptoms After a Sports-related Concussion
|
N/A | |
Withdrawn |
NCT00732108 -
Is Topiramate Effective in Treating Dizziness in Patient's With Migraine-Associated Dizziness
|
N/A | |
Active, not recruiting |
NCT05122663 -
Emergency Department Vestibular Rehabilitation Therapy for Dizziness and Vertigo
|
||
Recruiting |
NCT05634902 -
Implementation of Evidence-Based Practice for Dizziness
|
N/A | |
Completed |
NCT02640599 -
Stationary Bike Study
|
N/A |