Timothy C. Hain, MD（蒂莫西·c·海恩）.pdf

Structures of importance Otologic Dizziness (Dizziness from Ear) Timothy C. Hain, MD Northwestern University, Chicago t-hain@ The ear is an inertial navigation Vestibular Reflexes device Semicircular Canals VOR: Vestibulo- are rate sensors. ocular reflex Otoliths (utricle and VSR: Vestibulospinal saccule) are linear reflex accelerometers Bilateral symmetry means redundant design. Positional Vertigo Otologic (Ear) Dizziness The most common syndrome BPPV (benign paroxysmal Otologic Dizziness Fistula positional vertigo) -- about Bilateral SCD Other Benign Paroxysmal 50% of otologic, 20% all Neuritis BPPV Meniere’s disease -- about Menieres Positional Vertigo 20% Vestibular neuritis and (BPPV) related conditions (15%) Bilateral vestibular loss