StableEyes With Active Neurofeedback

The rehabilitation device guides users to perform sinusoidal head rotations, matched to a metronome, about the yaw, pitch, and roll axes (60 sec epochs, 5 minutes per axis, 15 min total). The assessment for each axis consists of the number of completed epochs with each epoch requiring head rotations of a different amplitude. Subjects are instructed to begin with an 'easy' amplitude (i.e. small) and increase or decrease amplitude depending on the subject's perception of motion sickness - which is input from 0 (absent motion sick) to 11 (vomit) using a handheld controller. Video-oculography captures eye and head velocity as well as tracks the number of blinks and saccades, metrics that can indicate worsening nausea.

Inclusion criteria

• Provision of signed and dated informed consent form
• Stated willingness to comply with all study procedures and availability for the duration of the study
• In good general health as evidenced by medical history or diagnosed with unilateral vestibular schwannoma
• Willing to adhere to the SWAN and/or vestibular rehabilitation regimen

Exclusion criteria

• Current use of anti-nausea medication
• Presence of cervical spine pathology that limits head motion to < 30 degrees in the horizontal or vertical plane (i.e. degenerative disc disease, rheumatoid arthritis)
• Any orthopedic pathology that prevents walking or standing independently (i.e. recent surgery)
• Legal blindness (20/200 or worse visual acuity)
• Treatment using a motion sickness investigational drug or other motion sickness behavioral intervention within 30 days