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Spontaneous downbeat nystagmus in posterior semicircular canal benign paroxysmal positional vertigo: a canalith jam?

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Authors and Affiliations

  1. ENT Unit, Department of Surgery, Arcispedale Santa Maria Nuova, AUSL, IRCCS, Viale Risorgimento 80, 42123, Reggio Emilia, Italy

    Andrea Castellucci & Angelo Ghidini

  2. Audiology & Vestibology Service, Centromedico, Viale Officina 7, 6500, Bellinzona, Switzerland

    Pasquale Malara

Authors
  1. Andrea Castellucci
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  2. Pasquale Malara
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  3. Angelo Ghidini
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Contributions

All authors read and approved the final manuscript.

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Correspondence to Andrea Castellucci.

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The authors certify that they comply with the Principles of Ethical Publishing and declare that they acted in accordance with ethical standards laid down in the 1964 Declaration of Helsinki and its later amendments.

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Electronic supplementary material

Online Resource 1

Presenting video-oculography showing spontaneous downbeat nystagmus with a torsional component beating toward the left side (upper eye poles). Straight head hanging position slightly enhanced spontaneous nystagmus. A therapeutic Demi-Semont maneuver for BPPV involving the non-ampullary arm of the right posterior semicircular canal is shown (AVI 15411 kb)

Online Resource 2

Post-treatment video-oculography showing a total receding of spontaneous nystagmus. Right Dix-Hallpike maneuver still elicited a subtle positional downbeat nystagmus with a torsional component beating toward the left ear (upper eye poles) probably consistent with few residual debris within the non-ampullary arm of the right posterior semicircular canal (AVI 15044 kb)

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Castellucci, A., Malara, P. & Ghidini, A. Spontaneous downbeat nystagmus in posterior semicircular canal benign paroxysmal positional vertigo: a canalith jam?. Neurol Sci 42, 313–315 (2021). https://doi.org/10.1007/s10072-020-04529-9

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  • DOI: https://doi.org/10.1007/s10072-020-04529-9

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