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Tytuł:
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Congruous Torsional Down Beating Nystagmus in the Third Position of the Semont's Maneuver in Patients Treated for Canalithiasis of Posterior Semicircular Canal Benign Paroxysmal Positional Vertigo: Its Significance and Prognostic Value.
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Autorzy:
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Giannoni B; Department of Neuroscience, Psychology, Drug's Area and Child's Health, University of Florence, Florence, Italy.; Unit of Audiology Careggi University Hospital, Florence, Italy.
Marcelli V; Neurotology Unit, Ospedale del Mare, Naples, Italy.
Verdolin I; Unit of Audiology Careggi University Hospital, Florence, Italy.
Checcucci C; Department of Physics and Astronomy, University of Florence, Italy Careggi University Hospital, Florence, Italy.
Pollastri F; Unit of Audiology Careggi University Hospital, Florence, Italy.
Pecci R; Unit of Audiology Careggi University Hospital, Florence, Italy.
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Źródło:
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Frontiers in neurology [Front Neurol] 2020 Sep 15; Vol. 11, pp. 949. Date of Electronic Publication: 2020 Sep 15 (Print Publication: 2020).
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Typ publikacji:
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Journal Article
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Język:
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English
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Imprint Name(s):
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Original Publication: [Lausanne : Frontiers Research Foundation, 2010]-
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References:
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Otol Neurotol. 2011 Aug;32(6):1008-11. (PMID: 21725255)
Otolaryngol Head Neck Surg. 2000 Mar;122(3):440-4. (PMID: 10699824)
Auris Nasus Larynx. 2017 Feb;44(1):1-6. (PMID: 27174206)
Rev Laryngol Otol Rhinol (Bord). 2001;122(3):179-83. (PMID: 11799859)
Clin Ter. 2003 Jan-Feb;154(1):7-11. (PMID: 12854277)
Laryngoscope. 2002 May;112(5):796-801. (PMID: 12150609)
Otol Neurotol. 2012 Sep;33(7):1127-30. (PMID: 22892804)
Acta Otorhinolaryngol Ital. 2018 Apr;38(2):145-150. (PMID: 29967559)
Neurology. 1994 May;44(5):796-800. (PMID: 8190277)
Arch Otolaryngol Head Neck Surg. 2003 Jun;129(6):629-33. (PMID: 12810466)
Otolaryngol Head Neck Surg. 2017 Mar;156(3_suppl):S1-S47. (PMID: 28248609)
J Neurol. 2012 May;259(5):882-5. (PMID: 22008871)
Neurology. 2008 May 27;70(22):2067-74. (PMID: 18505980)
J Neurol. 2014 May;261(5):866-9. (PMID: 24570284)
J Biomech. 2004 Aug;37(8):1137-46. (PMID: 15212918)
Audiol Neurootol. 2008;13(6):345-56. (PMID: 18525198)
J Neurol Neurosurg Psychiatry. 2006 Aug;77(8):980-2. (PMID: 16549410)
J Otolaryngol. 1979 Apr;8(2):151-8. (PMID: 430582)
Adv Otorhinolaryngol. 1988;42:290-3. (PMID: 3213745)
Otol Neurotol. 2005 Sep;26(5):1034-40. (PMID: 16151355)
Arch Otolaryngol. 1969 Dec;90(6):765-78. (PMID: 5353084)
J Vestib Res. 2019;29(2-3):57-87. (PMID: 31256095)
Otolaryngol Head Neck Surg. 2008 Nov;139(5 Suppl 4):S47-81. (PMID: 18973840)
Ann N Y Acad Sci. 2001 Oct;942:179-91. (PMID: 11710460)
J Vestib Res. 2015;25(3-4):105-17. (PMID: 26756126)
Front Neurol. 2016 Sep 16;7:150. (PMID: 27695437)
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Contributed Indexing:
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Keywords: Semont's liberatory maneuver; benign paroxysmal positional vertigo therapy outcomes; benign paroxysmal positional vertigo treatment; canalolithiasis; down beating nystagmus; liberating nystagmus; posterior semicircular canal; torsional down beating nystagmus
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Entry Date(s):
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Date Created: 20201019 Latest Revision: 20201022
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Update Code:
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20240105
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PubMed Central ID:
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PMC7533572
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DOI:
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10.3389/fneur.2020.00949
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PMID:
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33071926
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Due to its mechanical pathogenesis, benign paroxysmal positional vertigo treatment is mainly physical: when posterior semicircular canal is involved, Semont's maneuver is reported as one of the most effective liberating procedures. In the case of a canalolithiasis, the efficacy of the maneuver is corroborated by the appearance of some nystagmus findings during its performance. Liberating nystagmus, that can occur in the second position of Semont's maneuver and whose direction is congruous with the excitation of the affected posterior semicircular canal has proven to be a favorable prognostic sign. On the other hand, in clinical experience, we've frequently verified the appearance of another nystagmus during the execution of the maneuver: upon reaching the third position, when replacing the patient seated, a torsional down beating nystagmus, with the torsional component "congruous" with the stimulation of the vertical semicircular canals of the affected side, can often be appreciated. Such a sign can occur with or without having had the previous liberating nystagmus in the second position and is almost always associated with an intense vertigo and/or body pulsion. In this study, we describe the incidence and characteristics of the congruous torsional down beating nystagmus that can arise by assuming the third position of Semont's maneuver in a cohort of patients treated for posterior semicircular canal benign paroxysmal positional vertigo due to canalolithiasis. In the best of our knowledge, such a sign has never been described and explained before. On the basis of the pathophysiology and of the possible canal receptors stimulation during the different phases of Semont's maneuver, we formulated different hypothesis on how such a nystagmus can be generated. We observed that such a sign, when elicited, has a very good prognostic meaning for healing purposes, even better than that of liberating nystagmus. Therefore, congruous torsional down beating nystagmus should always be checked when performing Semont's maneuver because it could help in predicting success of physical treatment and in managing patients.
(Copyright © 2020 Giannoni, Marcelli, Verdolin, Checcucci, Pollastri and Pecci.)
