Inclusion Criteria:  Known or suspected vestibular dysfunction Healthy volunteers without dizziness to serve as healthy control subjects  Exclusion Criteria:  Previous cerebrovacular accident (stroke) Reported neurologic or oculuomotor disease Taking of medications that affect the vestibular or oculomotor system. Current symptoms of benign paroxysmal positional hypofunction Concussion occuring less than 7 days prior to enrollment in this study Currently pregnant, or plan to become pregnant during the timeline of the study Chronic kidney disease COPD Known coronary artery disease or cardiomyopathy immunocompromised state from a solid organ transplant Severe Obesity as defined by BMI of greater than or equal to 40 kg/m2 Sickle cell disease