PG	Photoplethysmogram
PW Doppler	Pulsed-Wave Doppler
APG	Acceleration Photoplethysmogram
PSV	Peak Systolic Velocity
EDV	End Diastolic Velocity
RI	Resistive Index
MV	Mean Flow Velocity
THI	Tinnitus Handicap Inventory
fNIRS	Functional Near-Infrared Spectroscopy
fMRI	Functional Magnetic Resonance Imaging
Tc-ECD SPECT	Technetium-99m Ethyl Cysteinate Dimer Single Photon Emission Computed Tomography
US	Ultrasound
IRB	Institutional Review Board
RMSK	Registered in Musculoskeletal
APCA	Alliance for Physician Certification & Advancement
SD	Standard Deviations
SE	Standard Errors
LMMs	Linear Mixed-Effects Models
BPPV	Benign Paroxysmal Positional Vertigo
NO	Nitric Oxide
ET-1	Endothelin-1