A Show of Ewald's Law: I Horizontal Semicircular Canal Benign Paroxysmal Positional Vertigo

Xueqing Zhang; Xueqing Zhang; Xueqing Zhang; Xueqing Zhang; Xueqing Zhang; Yanru Bai; Taisheng Chen; Taisheng Chen; Taisheng Chen; Taisheng Chen; Taisheng Chen; Wei Wang; Wei Wang; Wei Wang; Wei Wang; Wei Wang; Xi Han; Xi Han; Xi Han; Xi Han; Xi Han; Shanshan Li; Shanshan Li; Shanshan Li; Shanshan Li; Shanshan Li; Qiang Liu; Qiang Liu; Qiang Liu; Qiang Liu; Qiang Liu; Chao Wen; Chao Wen; Chao Wen; Chao Wen; Chao Wen

doi:10.3389/fneur.2021.632489

Frontiers in Neurology (Feb 2021)

A Show of Ewald's Law: I Horizontal Semicircular Canal Benign Paroxysmal Positional Vertigo

Xueqing Zhang,
Xueqing Zhang,
Xueqing Zhang,
Xueqing Zhang,
Xueqing Zhang,
Yanru Bai,
Taisheng Chen,
Taisheng Chen,
Taisheng Chen,
Taisheng Chen,
Taisheng Chen,
Wei Wang,
Wei Wang,
Wei Wang,
Wei Wang,
Wei Wang,
Xi Han,
Xi Han,
Xi Han,
Xi Han,
Xi Han,
Shanshan Li,
Shanshan Li,
Shanshan Li,
Shanshan Li,
Shanshan Li,
Qiang Liu,
Qiang Liu,
Qiang Liu,
Qiang Liu,
Qiang Liu,
Chao Wen,
Chao Wen,
Chao Wen,
Chao Wen,
Chao Wen

Affiliations

Xueqing Zhang: Department of Otorhinolaryngology Head and Neck Surgery, Tianjin First Central Hospital, Tianjin, China
Xueqing Zhang: Tianjin First Central Hospital, Institute of Otolaryngology of Tianjin, Tianjin, China
Xueqing Zhang: Key Laboratory of Auditory Speech and Balance Medicine, Department of Otorhinolaryngology Head and Neck Surgery, Tianjin First Central Hospital, Tianjin, China
Xueqing Zhang: Key Clinical Discipline of Tianjin (Otolaryngology), Tianjin, China
Xueqing Zhang: Otolaryngology Clinical Quality Control Centre, Tianjin, China
Yanru Bai: Academy of Medical Engineering and Translational Medicine, Tianjin University, Tianjin, China
Taisheng Chen: Department of Otorhinolaryngology Head and Neck Surgery, Tianjin First Central Hospital, Tianjin, China
Taisheng Chen: Tianjin First Central Hospital, Institute of Otolaryngology of Tianjin, Tianjin, China
Taisheng Chen: Key Laboratory of Auditory Speech and Balance Medicine, Department of Otorhinolaryngology Head and Neck Surgery, Tianjin First Central Hospital, Tianjin, China
Taisheng Chen: Key Clinical Discipline of Tianjin (Otolaryngology), Tianjin, China
Taisheng Chen: Otolaryngology Clinical Quality Control Centre, Tianjin, China
Wei Wang: Department of Otorhinolaryngology Head and Neck Surgery, Tianjin First Central Hospital, Tianjin, China
Wei Wang: Tianjin First Central Hospital, Institute of Otolaryngology of Tianjin, Tianjin, China
Wei Wang: Key Laboratory of Auditory Speech and Balance Medicine, Department of Otorhinolaryngology Head and Neck Surgery, Tianjin First Central Hospital, Tianjin, China
Wei Wang: Key Clinical Discipline of Tianjin (Otolaryngology), Tianjin, China
Wei Wang: Otolaryngology Clinical Quality Control Centre, Tianjin, China
Xi Han: Department of Otorhinolaryngology Head and Neck Surgery, Tianjin First Central Hospital, Tianjin, China
Xi Han: Tianjin First Central Hospital, Institute of Otolaryngology of Tianjin, Tianjin, China
Xi Han: Key Laboratory of Auditory Speech and Balance Medicine, Department of Otorhinolaryngology Head and Neck Surgery, Tianjin First Central Hospital, Tianjin, China
Xi Han: Key Clinical Discipline of Tianjin (Otolaryngology), Tianjin, China
Xi Han: Otolaryngology Clinical Quality Control Centre, Tianjin, China
Shanshan Li: Department of Otorhinolaryngology Head and Neck Surgery, Tianjin First Central Hospital, Tianjin, China
Shanshan Li: Tianjin First Central Hospital, Institute of Otolaryngology of Tianjin, Tianjin, China
Shanshan Li: Key Laboratory of Auditory Speech and Balance Medicine, Department of Otorhinolaryngology Head and Neck Surgery, Tianjin First Central Hospital, Tianjin, China
Shanshan Li: Key Clinical Discipline of Tianjin (Otolaryngology), Tianjin, China
Shanshan Li: Otolaryngology Clinical Quality Control Centre, Tianjin, China
Qiang Liu: Department of Otorhinolaryngology Head and Neck Surgery, Tianjin First Central Hospital, Tianjin, China
Qiang Liu: Tianjin First Central Hospital, Institute of Otolaryngology of Tianjin, Tianjin, China
Qiang Liu: Key Laboratory of Auditory Speech and Balance Medicine, Department of Otorhinolaryngology Head and Neck Surgery, Tianjin First Central Hospital, Tianjin, China
Qiang Liu: Key Clinical Discipline of Tianjin (Otolaryngology), Tianjin, China
Qiang Liu: Otolaryngology Clinical Quality Control Centre, Tianjin, China
Chao Wen: Department of Otorhinolaryngology Head and Neck Surgery, Tianjin First Central Hospital, Tianjin, China
Chao Wen: Tianjin First Central Hospital, Institute of Otolaryngology of Tianjin, Tianjin, China
Chao Wen: Key Laboratory of Auditory Speech and Balance Medicine, Department of Otorhinolaryngology Head and Neck Surgery, Tianjin First Central Hospital, Tianjin, China
Chao Wen: Key Clinical Discipline of Tianjin (Otolaryngology), Tianjin, China
Chao Wen: Otolaryngology Clinical Quality Control Centre, Tianjin, China

DOI: https://doi.org/10.3389/fneur.2021.632489
Journal volume & issue: Vol. 12

Abstract

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Objective: To evaluate horizontal semicircular canal (HSC) effects according to Ewald's law and nystagmus characteristics of horizontal semicircular canal benign paroxysmal positional vertigo (HSC-BPPV) in the supine roll test.Methods: Patients with HSC-BPPV (n = 72) and healthy subjects (n = 38) were enrolled. Latency, duration, and intensity of nystagmus elicited by supine roll test were recorded using video nystagmography.Results: In patients with HSC-BPPV, horizontal nystagmus could be elicited by right/left head position (positional nystagmus) and during head-turning (head-turning nystagmus), and nystagmus direction was the same as that of head turning. Mean intensity values of head-turning nystagmus in HSC-BPPV patients were (44.70 ± 18.24)°/s and (44.65 ± 19.27)°/s on the affected and unaffected sides, respectively, which was not a significant difference (p = 0.980), while those for positional nystagmus were (40.81 ± 25.56)°/s and (17.69 ± 9.31)°/s (ratio, 2.59 ± 1.98:1), respectively, representing a significant difference (p < 0.0001). There was no positional nystagmus in 49 HSC-BPPV patients after repositioning treatment, nor in the 38 healthy subjects. No significant difference in head-turning nystagmus was detected in HSC-BPPV patients with or without repositioning.Conclusions: The direction and intensity of nystagmus elicited by supine roll test in patients with HSC-BPPV, was broadly consistent with the physiological nystagmus associated with a same HSC with single factor stimulus. Our findings suggest that HSC-BPPV can be a show of Ewald's law in human body.

Published in Frontiers in Neurology

ISSN: 1664-2295 (Online)
Publisher: Frontiers Media S.A.
Country of publisher: Switzerland
LCC subjects: Medicine: Internal medicine: Neurosciences. Biological psychiatry. Neuropsychiatry: Neurology. Diseases of the nervous system
Website: https://www.frontiersin.org/journals/neurology/

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