Modelling of subarachnoid space width changes in apnoea resulting as a function of blood flow parameters

Kalicka, R.; Mazur, Kamila; Wolf, Jacek; Frydrychowski, Andrzej F.; Winklewski, Paweł J.

doi:10.1016/j.mvr.2017.03.010

Cited by 3 publications

(3 citation statements)

References 22 publications

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“…Cerebrovascular pulsatility plays an important role as it may directly affect brain functioning and structures in the longer perspective. The SAS oscillations at 1 – 1.5 Hz frequency are predominantly dependent on the heart rate 20,36 and cardiac output 37 . Augmented pulsatile cerebrospinal fluid (CSF) motion has been recently linked to impairments in white matter structure and function in ageing 38 , hypertension 39 and multiple sclerosis 40 .…”

Section: Discussionmentioning

confidence: 99%

“…Importantly, in accordance with the Nyquist theorem, the NIR-T/BSS high sampling frequency allows for signal analysis up to 35 Hz. Thus, as no other available technique does, the NIR-T/BSS accurately identifies rapid SAS width changes resulting from systole-diastole fluctuations in the cerebral blood volume 20 . Recent analyses have shown that the power spectrum density levels of SAS oscillations are characterized by detectable peaks at both cardiac and respiratory frequencies 21–23 .…”

Section: Introductionmentioning

confidence: 98%

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Impact of slow breathing on the blood pressure and subarachnoid space width oscillations in humans

Nuckowska

Gruszecki

Kot

et al. 2019

Sci Rep

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The aim of the study was to assess cardiac and respiratory blood pressure (BP) and subarachnoid space (SAS) width oscillations during the resting state for slow and fast breathing and breathing against inspiratory resistance. Experiments were performed on a group of 20 healthy volunteers (8 males and 12 females; age 25.3 ± 7.9 years; BMI = 22.1 ± 3.2 kg/m 2 ). BP and heart rate (HR) were measured using continuous finger-pulse photoplethysmography. SAS signals were recorded using an SAS monitor. Oxyhaemoglobin saturation (SaO 2 ) and end-tidal CO 2 (EtCO 2 ) were measured using a medical monitoring system. Procedure 1 consisted of breathing spontaneously and at controlled rates of 6 breaths/minute and 6 breaths/minute with inspiratory resistance for 10 minutes. Procedure 2 consisted of breathing spontaneously and at controlled rates of 6, 12 and 18 breaths/minute for 5 minutes. Wavelet analysis with the Morlet mother wavelet was applied for delineation of BP and SAS signals cardiac and respiratory components. Slow breathing diminishes amplitude of cardiac BP and SAS oscillations. The overall increase in BP and SAS oscillations during slow breathing is driven by the respiratory component. Drop in cardiac component of BP amplitude evoked by slow-breathing may be perceived as a cardiovascular protective mechanism to avoid target organ damage. Further studies are warranted to assess long-term effects of slow breathing.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Impact of slow breathing on the blood pressure and subarachnoid space width oscillations in humans

Nuckowska

Gruszecki

Kot

et al. 2019

Sci Rep

Self Cite

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“…There is some evidence suggesting a reduction in the amount of CRF in motion, if there is a resistance in the respiratory tract or apnea, with a decrease in the subarachnoid space [ 32 , 34 ]. Currently, it is not known what happens with physiotherapic, osteopathic, or manual treatments of the dysfunctional inspiratory muscle and the effect they have on CRF and improving brain function.…”

Section: Reviewmentioning

confidence: 99%

The Influence of Breathing on the Central Nervous System

Bordoni

Purgol²,

Bizzarri³

et al. 2018

Cureus

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The functions of the diaphragm do not stop locally in its anatomy but affect the whole body system. The respiratory rhythm, directly and indirectly, affects the central nervous system (CNS). This article describes and reviews these influences, containing, for the first time, information on this subject in a single text. The ability of breath to move the brain mass and determine patterns of neural oscillation will be discussed. The role of the diaphragm in influencing motor expression and its effect on intracranial blood shifts in respiratory activity will also be discussed. It is known that the diaphragm can have multiple uses in improving the symptomatological picture of chronic diseases, but there is no current, concrete data on the effects that the rehabilitative training or manual approaches could have on the patient; in particular, on his/her cognitive and cerebral aspects in general.

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Oscillations of Subarachnoid Space Width as a Potential Marker of Cerebrospinal Fluid Pulsatility

Gruszecki

Nuckowska

Szarmach

et al. 2018

Advances in Experimental Medicine and Biology

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In the cerebrospinal fluid (CSF) circulation, two components can be distinguished: bulk flow (circulation) and pulsatile flow (back and forth motion). CSF pulsatile flow is generated by both cardiac and respiratory cycles. Recent years have seen increased interest in cardiac- and respiratory-driven CSF pulsatility as an important component of cerebral homeostasis. CSF pulsatility is affected by cerebral arterial inflow and jugular outflow and potentially linked to white matter abnormalities in various diseases, such as multiple sclerosis or hypertension. In this review, we discuss the physiological mechanisms associated with CSF pulsation and its clinical significance. Finally, we explain the concept of using the oscillations of subarachnoid space width as a surrogate for CSF pulsatility.

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Modelling of subarachnoid space width changes in apnoea resulting as a function of blood flow parameters

Cited by 3 publications

References 22 publications

Impact of slow breathing on the blood pressure and subarachnoid space width oscillations in humans

Impact of slow breathing on the blood pressure and subarachnoid space width oscillations in humans

The Influence of Breathing on the Central Nervous System

Oscillations of Subarachnoid Space Width as a Potential Marker of Cerebrospinal Fluid Pulsatility

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