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相关概念视频

Accessory Structures of the Eye01:17

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Optical perception, or vision, is an extraordinary sense dependent on converting light signals received via the ocular organs. These organs, known as eyes, are securely positioned within the bony cavities of the skull, called orbits. The orbits serve a dual purpose: a protective shield for the ocular globes and a stable attachment point for the soft ocular tissues. The eye's external protective mechanisms include the eyelids, which are edged with lashes that act as a barrier against foreign...
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Glaucoma is an eye condition characterized by increased intraocular pressure that damages the retina and optic nerve, leading to irreversible blindness if left untreated. The human eye has various components, including the cornea, iris, pupil, lens, and optic nerve. Aqueous humor is secreted by the epithelium of the ciliary body in the posterior chamber and flows through the trabecular meshwork and canal of Schlemm, maintaining normal intraocular pressure. The trabecular meshwork and the canal...
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Angle Closure Glaucoma: Treatment01:28

Angle Closure Glaucoma: Treatment

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Angle-closure glaucoma, or closed-angle glaucoma, is an eye condition where the iris bulges out and blocks the iridocorneal angle, resulting in a buildup of aqueous humor and increased intraocular pressure. Immediate medical attention is necessary due to the sudden onset of symptoms. The treatment for angle-closure glaucoma includes short-term and long-term approaches. Short-term treatment involves using eye drops like pilocarpine to lower intraocular pressure by increasing aqueous humor...
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At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category,...
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Open Angle Glaucoma: Treatment01:27

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In open-angle glaucoma, the iridocorneal angle remains open, but the trabecular meshwork becomes stiff, slowing down the outflow of aqueous humor. This causes a buildup of aqueous humor in the anterior chamber, leading to a sudden increase in intraocular pressure. The treatment for open-angle glaucoma focuses on reducing the elevated intraocular pressure by either decreasing the secretion of aqueous humor or increasing its outflow.
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The Vestibular System01:29

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The vestibular system is a set of inner ear structures that provide a sense of balance and spatial orientation. This system is comprised of structures within the labyrinth of the inner ear, including the cochlea and two otolith organs—the utricle and saccule. The labyrinth also contains three semicircular canals—superior, posterior, and horizontal—that are oriented on different planes.
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相关实验视频

Updated: Jun 25, 2025

Behavioral Assessment of the Aging Mouse Vestibular System
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人口老龄化中的前庭眼镜反射.

Basak Mutlu1, Sidika Cesur1, Ahmet Mutlu2,3

  • 1Department of Audiology, Istanbul Medeniyet University Faculty of Health Sciences, Istanbul, Türkiye.

Sisli Etfal Hastanesi tip bulteni
|May 29, 2024
PubMed
概括

在健康的老年人中,前庭眼反射 (VOR) 显示出70岁后与年龄相关的微妙变化. 纠正的,而不仅仅是VOR增益,可能更好地揭示这些衰老的前置系统变化.

关键词:
衰老的衰老 衰老的衰老纠正的萨卡德斯纠正的萨卡德斯在前庭眼镜反射.视频头部冲动测试 测试

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相关实验视频

Last Updated: Jun 25, 2025

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科学领域:

  • 耳鼻喉科 耳鼻喉科 耳鼻喉科
  • 神经科学是一个神经科学.
  • 老年学是一门学科.

背景情况:

  • 前视眼反射 (VOR) 对于视线稳定至关重要.
  • 与前置系统的年龄相关的变化会影响平衡和视力.
  • 了解健康老年人的这些变化对于识别前体功能障碍的早期迹象至关重要.

研究的目的:

  • 在没有被诊断为前庭病理的60岁以上个体中评估前庭眼神反射 (VOR).
  • 为了研究与年龄相关的VOR功能在生命的第七和第八十年之间的差异.
  • 为了探索VOR增长,纠正旋和年龄之间的相关性.

主要方法:

  • 进行了双边六半圆通道视频头脉冲测试 (vHIT).
  • 进行了头障碍物清单和欧洲评估的尺度.
  • 分析了103名健康参与者 (平均年龄69.35±7.41岁),分为第7个十年 (64.32±3.12) 和第8个十年及以上 (76.11±5.93) 组.

主要成果:

  • 对于任何半圆通道,在第七和第八个十年组之间没有发现VOR增益的显著差异.
  • 在第八个十年及以上的小组中,纠正的萨卡德与右侧和左后半圆通道的VOR增长有中等的正相关性.
  • 在第八个十年及以上的组中,观察到年龄和左侧半圆通道VOR增长之间的弱负相关性.

结论:

  • 在70岁以后,前置系统的与年龄相关的变化变得明显.
  • 在检测与年龄相关的VOR变化方面,纠正的saccade发现可能比VOR增益更为敏感.
  • vHIT是评估老年人VOR功能和与年龄相关的变化的一个有价值的工具.