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- W4386701497 endingPage "103504" @default.
- W4386701497 startingPage "103504" @default.
- W4386701497 abstract "Damage to the cerebrovascular network is a universal feature of traumatic brain injury (TBI). This damage is present during different phases of the injury and can be non-invasively assessed using functional near infrared spectroscopy (fNIRS). fNIRS signals are influenced by partial arterial carbon dioxide (PaCO2), neurogenic, Mayer waves, respiratory and cardiac oscillations, whose characteristics vary in time and frequency and may differ in the presence of TBI. Therefore, this study aims to investigate differences in time-frequency characteristics of these fNIRS signal components between healthy controls and TBI patients and characterize the changes in their characteristics across phases of the injury. Data from 11 healthy controls and 21 TBI patients were collected during the hypercapnic protocol. Results demonstrated significant differences in low-frequency oscillations between healthy controls and TBI patients, with the largest differences observed in Mayer wave band (0.06 to 0.15 Hz), followed by the PaCO2 band (0.012 to 0.02 Hz). The effects within these bands were opposite, with (i) Mayer wave activity being lower in TBI patients during acute phase of the injury (d = 0.37 [0.16, 0.57]) and decreasing further during subacute (d = 0.66 [0.44, 0.87]) and postacute (d = 0.75 [0.50, 0.99]) phases; (ii) PaCO2 activity being lower in TBI patients only during acute phase of the injury (d = 0.36 [0.15, 0.56]) and stabilizing to healthy levels by the subacute phase. These findings demonstrate that TBI patients have impairments in low frequency oscillations related to different mechanisms and that these impairments evolve differently over the course of injury." @default.
- W4386701497 created "2023-09-14" @default.
- W4386701497 creator A5008982500 @default.
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- W4386701497 creator A5015950641 @default.
- W4386701497 creator A5029617270 @default.
- W4386701497 creator A5066742173 @default.
- W4386701497 date "2023-01-01" @default.
- W4386701497 modified "2023-10-18" @default.
- W4386701497 title "Differences in Time-Frequency Characteristics between Healthy Controls and TBI Patients during hypercapnia assessed via fNIRS" @default.
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- W4386701497 doi "https://doi.org/10.1016/j.nicl.2023.103504" @default.
- W4386701497 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/37734166" @default.
- W4386701497 hasPublicationYear "2023" @default.