Pilot Project on External Vestibular Prosthesis in Chronic Subjective Dizziness

Subject population: 20 patients with diagnosis of Chronic Subjective Dizziness (CSD) and 10 normal volunteers. Inclusion Criteria: * Subjects will be 25-70 years of age inclusive and pregnant women may participate. * Patients will have CSD as their primary diagnosis for the cause of their balance and dizziness complaints provided by the Behavioral Medicine Program for Dizziness, a division of the Department of Psychiatry \& Psychology. * Normal volunteers will have a negative history of otologic \& neurologic disorders and no history of dizziness and balance problems. * Normal volunteers will have normal findings on a screening office examination for peripheral and central vestibular system involvement (see methods for details of the examination) and screening for normal or symmetrical hearing loss of explainable origin. Exclusion Criteria: * Patients with positive indications from testing of peripheral and/or central vestibular system involvement that is felt to be influencing the symptoms reported beyond the CSD alone. * Patients with mobility restriction that would prevent participating in the tests or the intensive therapy trials. * Subjects with hearing impairment that interferes with oral communication.