Static cervico-ocular reflex in healthy humans.

IF 1.2 4区医学 Q3 OTORHINOLARYNGOLOGY Acta Oto-Laryngologica Pub Date : 2023-05-01 DOI:10.1080/00016489.2023.2201275

Tomoki Ooka, Keiji Honda, Takeshi Tsutsumi

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Abstract

Background: Dynamic cervico- (COR) and vestibulo-ocular reflex (VOR) contribute to stabilise visual images in the retina. The gain in dynamic COR is small in healthy individuals but increases in patients with vestibular dysfunction. Conversely, static COR has not been directly observed in healthy individuals.

Objectives: To elucidate the presence of static COR and quantify it in normal individuals in the roll plane.

Methods: Eleven healthy participants were included in the study. Eye torsions were measured using video oculography to evaluate the static COR induced by lateral neck flexion during a head-upright-with-body-tilt position at 15°, 30°, and 45°. The ocular counterroll (OCR) was compared during whole-body and head tilts to assess the influence of static COR on OCR.

Results: Static COR was significantly observed as eye torsion in the direction opposite to the body tilt. The head tilt OCR was significantly smaller than the whole-body tilt OCR to the right side but not to the left side.

Conclusion: Static COR exists in healthy individuals and tends to show higher amplitude as neck flexion stimulation increases.

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健康人的静态颈眼反射。

背景:动态颈反射(COR)和前庭眼反射(VOR)有助于视网膜视觉图像的稳定。动态COR的增加在健康个体中很小，但在前庭功能障碍患者中增加。相反，在健康个体中没有直接观察到静态COR。目的:阐明在滚动平面上正常个体中存在的静态COR并对其进行量化。方法:11名健康受试者参与研究。使用视频眼视术测量眼扭转，以评估头部直立，身体倾斜15°，30°和45°时侧颈屈曲引起的静态COR。比较全身倾斜和头部倾斜时的眼反转(OCR)，以评估静态COR对OCR的影响。结果:眼球扭转方向与身体倾斜方向相反，可见明显的静态COR。头部倾斜OCR显著小于全身倾斜OCR，但不小于左侧。结论:健康人群中存在静态型COR，且随着颈部屈曲刺激的增加，其振幅增大。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Acta Oto-Laryngologica 医学-耳鼻喉科学

CiteScore

2.50

自引率

0.00%

发文量

审稿时长

3-6 weeks

期刊介绍： Acta Oto-Laryngologica is a truly international journal for translational otolaryngology and head- and neck surgery. The journal presents cutting-edge papers on clinical practice, clinical research and basic sciences. Acta also bridges the gap between clinical and basic research.