Labels:text OCR: Resident and Staff Physician Patient Education Chart Vertigo--Vestibular Apparatus Disorientation The vestibular apparatus provides a sense of equilibrium and orientation to a person's surroundings. Semicircular Canals (filled with fluid, endolymph) Vestibular Apparatus Inner Ear Cochlea Cochlear Duct Ear Drum Reprinted with permission from Resident and Staff Physician (c) 1991-92, 1993 by Romaine Pierson Publishers, Inc.