Gaze shift dynamic visual acuity: A functional test of gaze stability that distinguishes unilateral vestibular hypofunction

Po Yin Chen, Ying Chun Jheng, Shih En Huang, Lieber Po-Hung Li, Shun Hwa Wei, Michael C. Schubert, Chung Lan Kao

研究成果: 雜誌貢獻文章同行評審

摘要

BACKGROUND: Embedded within most rapid head rotations are gaze shifts, which is an initial eye rotation to a target of interest, followed by a head rotation towards the same target. Gaze shifts are used to acquire an image that initially is outside of the participant's current field of vision. Currently, there are no tools available that evaluate the functional relevance of a gaze shift. OBJECTIVE: The purpose of our study was to measure dynamic visual acuity (DVA) while performing a gaze shift. METHODS: Seventy-one healthy participants (42.79±16.89 years) and 34 participants with unilateral vestibular hypofunction (UVH) (54.59±20.14 years) were tested while wearing an inertial measurement unit (IMU) sensor on the head and walking on a treadmill surrounded by three monitors. We measured visual acuity during three subcomponent tests: standing (static visual acuity), while performing an active head rotation gaze shift, and an active head rotation gaze shift while walking (gsDVAw). RESULTS: While doing gsDVAw, patients with Left UVH (n=21) had scores worse (p=0.023) for leftward (0.0446±0.0943 LogMAR) head rotation compared with the healthy controls (-0.0075±0.0410 LogMAR). Similarly, patients with right UVH (N=13) had worse (p=0.025) gsDVAw for rightward head motion (0.0307±0.0481 LogMAR) compared with healthy controls (-0.0047±0.0433 LogMAR). As a whole, gsDVAw scores were worse in UVH compared to the healthy controls when we included the ipsilesional head rotation on both sides gsDVAw (0.0061±0.0421 LogMAR healthy vs. 0.03926±0.0822 LogMAR UVH, p=0.003). Controlling for age had no effect, the gsDVAw scores of the patients were always worse (p
原文英語
頁(從 - 到)33-45
頁數13
期刊Journal of Vestibular Research: Equilibrium and Orientation
31
發行號1
DOIs
出版狀態已發佈 - 2021

ASJC Scopus subject areas

  • 神經科學 (全部)
  • 耳鼻咽喉科
  • 感覺系統
  • 神經病學(臨床)

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