Bilateral loss of vestibular function (inner ear balance sensation) is disabling, with affected individuals suffering chronic disequilibrium, increased risk of falls, and inability to maintain stable vision during head movements typical of daily life. Whil most individuals with partial loss compensate through rehabilitative strategies enlisting other senses, those with profound loss who fail to compensate have no good therapeutic options. Because the vestibular nerves are intact in many such cases, electrical stimuli encoding head rotation should be able to drive the nerve and restore sensation of head movement, much like a cochlear implant restores auditory function. The proposed research program represents the fourth step of a five-step plan to develop an effective treatment for individuals disabled by bilateral vestibular deficiency. Step 1 was to establish a neurophysiologic foundation for prosthetic restoration of the 3D VOR in rodents. Step 2 comprised development of the first multichannel, head-mounted vestibular prosthesis able to restore sensation of 3D head rotation. Step 3 optimized stimulus protocols and electrode designs in rodents and then transitioned experiments from acute to chronic and from rodents to nonhuman primates. Step 4 - the current proposal - will translate MVP technology from rhesus monkeys to humans via an early feasibility study of a modified cochlear implant adapted to serve as a vestibular prosthesis, setting the stage for final revisions to MVP designs and a subsequent, large-scale pivotal trial.

Public Health Relevance

Profound bilateral loss of vestibular (inner ear balance) sensation causes chronic dizziness and unsteady vision during head movement. This research program will develop and test a vestibular implant designed to measure head rotation and stimulate the vestibular nerve to help restore this important sense.

Agency
National Institute of Health (NIH)
Institute
National Institute on Deafness and Other Communication Disorders (NIDCD)
Type
Research Project (R01)
Project #
5R01DC013536-02
Application #
8735928
Study Section
Special Emphasis Panel (ZDC1)
Program Officer
Miller, Roger
Project Start
2013-09-17
Project End
2018-08-31
Budget Start
2014-09-01
Budget End
2015-08-31
Support Year
2
Fiscal Year
2014
Total Cost
Indirect Cost
Name
Johns Hopkins University
Department
Otolaryngology
Type
Schools of Medicine
DUNS #
City
Baltimore
State
MD
Country
United States
Zip Code
21218
Hageman, Kristin N; Kalayjian, Zaven K; Tejada, Francisco et al. (2016) A CMOS Neural Interface for a Multichannel Vestibular Prosthesis. IEEE Trans Biomed Circuits Syst 10:269-79
Sun, Daniel Q; Ward, Bryan K; Semenov, Yevgeniy R et al. (2014) Bilateral Vestibular Deficiency: Quality of Life and Economic Implications. JAMA Otolaryngol Head Neck Surg 140:527-34
Valentin, Nicolas S; Hageman, Kristin N; Dai, Chenkai et al. (2013) Development of a multichannel vestibular prosthesis prototype by modification of a commercially available cochlear implant. IEEE Trans Neural Syst Rehabil Eng 21:830-9