Year 2024

• Sport-related concussion alters cerebral hemodynamic activity during controlled respiration

  Publication

  • C. A. Ellingson
  • J. Singh
  • C. J. Ellingson
  • M. A. Shafiq
  • L. W. Sirant
  • K. D. Dorsch
  • M. Gruszecki
  • G. Kratzig
  • J. Neary

  - JOURNAL OF NEUROPHYSIOLOGY - Year 2024

  This study investigated cerebral hemodynamic activity following sport-related concussion. Prefrontal cortex oxygenation was assessed by near-infrared spectroscopy (NIRS) during a controlled breathing protocol. Wavelet transformation of the NIRS signals showed significant decreases in HbO2 and HbD amplitude at the respiratory frequency interval (0.10–0.6 HZ) from preseason baseline to acute concussion. These results suggest a decreased...

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Year 2021

• Coupling between Blood Pressure and Subarachnoid Space Width Oscillations during Slow Breathing

  Publication

  • A. Gruszecka
  • M. Nuckowska
  • M. Waskow
  • J. Kot
  • P. Winklewski
  • W. Gumiński (formerly: W. Guminski)
  • A. F. Frydrychowski
  • J. Wtorek
  • A. Bujnowski
  • P. Lass... and 2 others

  - ENTROPY - Year 2021

  The precise mechanisms connecting the cardiovascular system and the cerebrospinal fluid (CSF) are not well understood in detail. This paper investigates the couplings between the cardiac and respiratory components, as extracted from blood pressure (BP) signals and oscillations of the subarachnoid space width (SAS), collected during slow ventilation and ventilation against inspiration resistance. The experiment was performed on...

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• Mild poikilocapnic hypoxia increases very low frequency haemoglobin oxygenation oscillations in prefrontal cortex

  Publication

  • A. Gruszecka
  • M. Waskow
  • M. A. Malkiewicz
  • J. Neary
  • J. Singh
  • T. Teckchandani
  • G. Kratzig
  • M. Wszedybyl-Winklewska
  • A. F. Frydrychowski
  • J. Rumiński... and 4 others

  - BIOLOGICAL RESEARCH - Year 2021

  Background: The aim of the study was to investigate the effect of mild cerebral hypoxia on haemoglobin oxygenation(HbO2), cerebrospinal fluid dynamics and cardiovascular physiology. To achieve this goal, four signals were recorded simultaneously: blood pressure, heart rate / electrocardiogram, HbO2 from right hemisphere and changes of subarachnoid space (SAS) width from left hemisphere. Signals were registered from 30 healthy,...

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Year 2020

• Comparison of near infrared spectroscopy (NIRS) and near-infrared transillumination-backscattering sounding (NIR-T/BSS) methods

  Publication

  • A. Gruszecka
  • M. Gruszecki
  • P. J. Neary
  • J. Singh
  • T. Teckchandani
  • M. Waskow
  • M. Wszedybyl-Winklewska
  • W. Gumiński
  • A. F. Frydrychowski
  • J. Rumiński... and 3 others

  - Scientific Reports - Year 2020

  The aim of the study was to compare simultaneously recorded a NIR-T/BSS and NIRS signals from healthy volunteers. NIR-T/BSS is a device which give an ability to non-invasively detect and monitor changes in the subarachnoid space width (SAS). Experiments were performed on a group of 30 healthy volunteers (28 males and 2 females, age 30.8 ± 13.4 years, BMI = 24.5 ± 2.3 kg/m2). We analysed recorded signals using analysis methods based...

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