| Autor: |
Michael C. Schubert, Janet Helminski, David S. Zee, Elisabetta Cristiano, Antonio Giannone, Giuseppe Tortoriello, Vincenzo Marcelli |
| Jazyk: |
angličtina |
| Rok vydání: |
2020 |
| Předmět: |
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| Zdroj: |
Laryngoscope Investigative Otolaryngology, Vol 5, Iss 1, Pp 163-167 (2020) |
| Druh dokumentu: |
article |
| ISSN: |
2378-8038 |
| DOI: |
10.1002/lio2.352 |
| Popis: |
Abstract Introduction Benign paroxysmal positional vertigo (BPPV) of the horizontal semicircular canal (hSCC) can present with otoconia blocking its lumen (canalith jam), with signs and symptoms that make it difficult to distinguish from central nervous system pathology. Objective Here we report two cases of canalith jam affecting the hSCC and offer a theoretical mechanism based on known vestibular neurophysiology. Methods We use video‐oculography to document the canalith jam and show the moment the otoconia loosen. Results Canalith jam is a rare form of BPPV remedied with repositioning maneuvers. Conclusion Clinicians should consider canalith jam as a mechanism for BPPV when the nystagmus is (a) Direction fixed with fixation removed and during positional testing; (b) Velocity dependent on supine head position; (c) Converts to geotropic directional changing nystagmus. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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