Research in Vestibular Science

Extremely Long Latency Benign Paroxysmal Positional Vertigo: Emil Riis Abrahamsen, Dan Dupont Hougaard; Res Vestib Sci. 2017;16(2):64-68. Published online June 15, 2017; DOI: https://doi.org/10.21790/rvs.2017.16.2.64

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Case history of a 67-year-old man diagnosed with posterior benign paroxysmal positional vertigo (BPPV) with extremely long latencies after holding the Dix-Hallpike position for five minutes. Additional vestibular assessment indicated partial unilateral hypofunction. The patient had a history compatible with classic BPPV. This patient, however, did not have any positional nystagmus after doing standard positional testing. With extremely prolonged Dix-Hallpike testing (five minutes), the patient experienced nausea and vertigo. Concomitantly classic peripheral nystagmus was observed. After a total of seventeen treatments in a reposition chair a total relief of symptoms was obtained. The extremely long latencies observed in this patient were ascribed to otoconial adherence and/or otoconial size. This type of BPPV has not previously been described.

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Upbeat and Direction-Changing Torsional Nystagmus While Straight Head Hanging: A New Sign of Benign Paroxysmal Positional Vertigo Involving Bilateral Posterior Semicircular Canals
Hyun-Jae Kim, Sang Jin Park, Ji-Soo Kim
Journal of Clinical Neurology.2024; 20(1): 100. CrossRef

A Case of Creutzfeldt-Jakob Disease Presenting Mainly with Abnormal Eye Movements: Yeo Jeong Kang, Jun Hyun Kim, Tae Eun Kim, Sun Ah Park, Tae Kyeong Lee; Res Vestib Sci. 2014;13(2):53-56.

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Abstract PDF: Creutzfeldt-Jakob disease (CJD) is a human prion disease with rapidly progressive neurodegeneration. The major clinical manifestations of CJD include mental deterioration, myoclonus, cerebellar dysfunction, and neuro-ophthalmic symptoms and signs. However, abnormal eye movements as an early sign of CJD are rare. We report a 49-year-old man with periodic alternating nystagmus in early disease course.

Periodic Alternating Nystagmus in Vestibulocochlear Disorder: Seong Hae Jeong, Eung Seok Oh, Ji Hee Lee, Jae Moon Kim; Res Vestib Sci. 2009;8(1):49-51.

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Abstract PDF: Periodic alternating nystagmus (PAN) is characterized by horizontal nystagmus that reverses direction periodically. PAN can occur in both congenital and acquired conditions. We report a 58-year old man with peripheral vertigo and hearing impairment showing PAN in darkness. Key Words: Vertigo; Hearing loss; Nystagmus, Pathologic; Meniere Disease

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