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相关概念视频

Equilibrium and Balance01:15

Equilibrium and Balance

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The inner ear assumes dual functionalities of auditory perception and equilibrium maintenance. The vestibule is the organ responsible for balance. This organ contains mechanoreceptors, specifically hair cells, endowed with stereocilia, which aid in deciphering information regarding the position and motion of our heads. Two intrinsic components, the utricle and saccule, help perceive head position, while the semicircular canals track head movement. Neurological messages initiated in the...
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Using Unidirectional Rotations to Improve Vestibular System Asymmetry in Patients with Vestibular Dysfunction
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每天的人工引力部分减轻前庭处理的变化,与头向下倾斜的床靠部分相关.

G D Tays1, K E Hupfeld1, H R McGregor1

  • 1Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, USA.

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概括

人工引力 (AG) 可能会抵消大脑和平衡由头向下倾斜床靠 (HDT) 的变化. 每日AG减轻了改变的前庭处理和保持大脑激活,与更好的HDT后平衡性能相关联.

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科学领域:

  • 神经科学是一个神经科学.
  • 空间生理学 空间生理学
  • 人体生理学 人体生理学

背景情况:

  • 微重力显著影响前庭信号和身体负荷,导致感官重权.
  • 俯仰卧床 (HDT) 是一种基于地面的模型,模拟了类似于太空飞行的卸载效应.
  • 人工引力 (AG) 是对太空飞行引起的生理衰退的潜在对策.

研究的目的:

  • 为了评估每日人工重力 (AG) 的有效性,以抵消由60天的向下倾斜卧床 (HDT) 诱导的脑部和行为变化.
  • 通过使用功能磁共振成像 (fMRI) 调查AG在HDT期间对前庭处理和大脑激活模式的影响.

主要方法:

  • 在60天的HDT (连续或间歇性发作) 中,两组每天通过短臂离心机接受30分钟的AG.
  • 一个对照组 (CTRL) 在没有AG的情况下接受了HDT.
  • 在HDT之前,期间和之后收集了fMRI扫描,以评估前体刺激期间在感兴趣的区域和整个大脑中的大脑激活.

主要成果:

  • 在前体刺激期间,AG组在小脑激活没有变化,而CTRL组显示激活减少.
  • 在AG组中,左前庭皮层激活变化最小的个体在HDT后表现出更好的平衡.
  • 全脑分析显示,AG在右前中心和下面的正面回旋中保持了HDT前的激活水平,而CTRL显示激活增加.

结论:

  • 每日AG可以减轻前庭处理和相关的大脑激活变化的变化,由HDT诱导.
  • 在模拟的微重力条件下,AG可能会保留神经通路,这对于前庭功能和平衡控制至关重要.
  • 这些发现支持AG作为维持太空飞行期间生理功能的一种有希望的对策.