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首页> 外文期刊>Selected Topics in Quantum Electronics, IEEE Journal of >Low-Frequency Spontaneous Oscillations of Cerebral Hemodynamics Investigated With Near-Infrared Spectroscopy: A Review
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Low-Frequency Spontaneous Oscillations of Cerebral Hemodynamics Investigated With Near-Infrared Spectroscopy: A Review

机译：低频自发性脑血流动力学的近红外光谱研究：综述。

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摘要

Hemodynamic low-frequency oscillations (LFOs), in the range 0.01-0.1 Hz, are intriguing, yet elusive phenomena, which occur spontaneously in the vascular system. More than 150 years have passed since their discovery, but the cellular mechanisms at their origin and their physiological implications have yet to be unraveled. The study of LF hemodynamic oscillations is considered to be relevant in areas of brain research such as cerebral autoregulation, functional and effective connectivity, and their related pathologies. These research areas have been traditionally investigated by transcranial Doppler (autoregulation) and functional MRI [functional connectivity (FC)]. The purpose of this paper is to review the work that has been done in this area using near-infrared spectroscopy (NIRS), which is a noninvasive technique used for monitoring and imaging tissue hemodynamics. NIRS has the advantage of being sensitive to both oxy- and deoxyhemoglobin concentration changes. Therefore, not only can it be used in autoregulation and FC studies (for broader populations of subjects), it can also help understand the local interplay between vascular and metabolic parameters. Finally, we present a novel approach to the study of LFOs and to the physiological interpretation of the amplitude and relative phase of oscillatory components of oxy- and deoxyhemoglobin concentrations.
机译：频率范围为0.01-0.1 Hz的血液动力学低频振荡（LFO）引人入胜，但难以捉摸，这种现象在血管系统中自发发生。自发现以来已有150多年的历史，但是其起源的细胞机制及其生理意义尚未阐明。 LF血流动力学振荡的研究被认为与脑研究相关，例如脑自动调节，功能和有效连通性及其相关病理。这些研究领域传统上通过经颅多普勒检查（自动调节）和功能性MRI（功能连接性（FC））进行研究。本文的目的是回顾使用近红外光谱法（NIRS）在该领域所做的工作，这是一种用于监测和成像组织血流动力学的非侵入性技术。 NIRS的优点是对氧合血红蛋白和脱氧血红蛋白的浓度变化均敏感。因此，它不仅可以用于自动调节和FC研究（针对更广泛的受试者群体），还可以帮助理解血管和代谢参数之间的局部相互作用。最后，我们提出了一种新颖的方法来研究LFO，以及对氧和脱氧血红蛋白浓度的振荡成分的振幅和相对相位进行生理解释。

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