Zobrazeno 1 - 10
of 26
pro vyhledávání: '"Lauri Raitamaa"'
Autor:
Johanna Tuunanen, Heta Helakari, Niko Huotari, Tommi Väyrynen, Matti Järvelä, Janne Kananen, Annastiina Kivipää, Lauri Raitamaa, Seyed-Mohsen Ebrahimi, Mika Kallio, Johanna Piispala, Vesa Kiviniemi, Vesa Korhonen
Publikováno v:
Frontiers in Neuroscience, Vol 18 (2024)
IntroductionThe cerebrospinal fluid dynamics in the human brain are driven by physiological pulsations, including cardiovascular pulses and very low-frequency (< 0.1 Hz) vasomotor waves. Ultrafast functional magnetic resonance imaging (fMRI) facilita
Externí odkaz:
https://doaj.org/article/93d72412edbf40c484e004635eb38365
Autor:
Seyed-Mohsen Ebrahimi, Johanna Tuunanen, Ville Saarela, Marja Honkamo, Niko Huotari, Lauri Raitamaa, Vesa Korhonen, Heta Helakari, Matti Järvelä, Mika Kaakinen, Lauri Eklund, Vesa Kiviniemi
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-17 (2024)
Abstract The eye possesses a paravascular solute transport pathway that is driven by physiological pulsations, resembling the brain glymphatic pathway. We developed synchronous multimodal imaging tools aimed at measuring the driving pulsations of the
Externí odkaz:
https://doaj.org/article/4a30b41aef4d4e26a4dda2aa0c015305
Autor:
Heta Helakari, Matti Järvelä, Tommi Väyrynen, Johanna Tuunanen, Johanna Piispala, Mika Kallio, Seyed Mohsen Ebrahimi, Valter Poltojainen, Janne Kananen, Ahmed Elabasy, Niko Huotari, Lauri Raitamaa, Timo Tuovinen, Vesa Korhonen, Maiken Nedergaard, Vesa Kiviniemi
Publikováno v:
Frontiers in Neuroscience, Vol 17 (2023)
IntroductionSleep increases brain fluid transport and the power of pulsations driving the fluids. We investigated how sleep deprivation or electrophysiologically different stages of non-rapid-eye-movement (NREM) sleep affect the human brain pulsation
Externí odkaz:
https://doaj.org/article/b860f660bf1b47018ea5271fb65c137f
Autor:
Timo Tuovinen, Janne Kananen, Zalan Rajna, Johannes Lieslehto, Vesa Korhonen, Riikka Rytty, Heli Mattila, Niko Huotari, Lauri Raitamaa, Heta Helakari, Ahmed Abou Elseoud, Johanna Krüger, Pierre LeVan, Osmo Tervonen, Juergen Hennig, Anne M. Remes, Maiken Nedergaard, Vesa Kiviniemi
Publikováno v:
Scientific Reports, Vol 10, Iss 1, Pp 1-11 (2020)
Abstract Biomarkers sensitive to prodromal or early pathophysiological changes in Alzheimer’s disease (AD) symptoms could improve disease detection and enable timely interventions. Changes in brain hemodynamics may be associated with the main clini
Externí odkaz:
https://doaj.org/article/caee84f1ec8b4f068b3915608e8cac85
Autor:
Niko Huotari, Johanna Tuunanen, Lauri Raitamaa, Ville Raatikainen, Janne Kananen, Heta Helakari, Timo Tuovinen, Matti Järvelä, Vesa Kiviniemi, Vesa Korhonen
Publikováno v:
Frontiers in Neuroscience, Vol 16 (2022)
The physiological pulsations that drive tissue fluid homeostasis are not well characterized during brain activation. Therefore, we used fast magnetic resonance encephalography (MREG) fMRI to measure full band (0–5 Hz) blood oxygen level-dependent (
Externí odkaz:
https://doaj.org/article/7e47a123f8f0464f978990c062d14062
Autor:
Niko Huotari, Lauri Raitamaa, Heta Helakari, Janne Kananen, Ville Raatikainen, Aleksi Rasila, Timo Tuovinen, Jussi Kantola, Viola Borchardt, Vesa J. Kiviniemi, Vesa O. Korhonen
Publikováno v:
Frontiers in Neuroscience, Vol 13 (2019)
Low image sampling rates used in resting state functional magnetic resonance imaging (rs-fMRI) may cause aliasing of the cardiorespiratory pulsations over the very low frequency (VLF) BOLD signal fluctuations which reflects to functional connectivity
Externí odkaz:
https://doaj.org/article/c13d44b66958487486d33aa54fc34f2a
Autor:
Seyed-Mohsen, Ebrahimi, Johanna, Tuunanen, Ville, Saarela, Marja, Honkamo, Niko, Huotari, Lauri, Raitamaa, Vesa, Korhonen, Heta, Helakari, Mika, Kaakinen, Lauri, Eklund, Vesa, Kiviniemi
Recent research shows the eye has a paravascular solute transport pathway driven by physiological pulsations resembling the brain. we developed synchronous multimodal imaging tools aimed at measuring the driving pulsations of the human eye. We used a
Externí odkaz:
http://arxiv.org/abs/2304.12629
Autor:
Tommi Väyrynen, Heta Helakari, Vesa Korhonen, Johanna Tuunanen, Niko Huotari, Johanna Piispala, Mika Kallio, Lauri Raitamaa, Janne Kananen, Matti Järvelä, J. Matias Palva, Vesa Kiviniemi
Infra-slow fluctuations (ISFs, 0.008-0.1 Hz) characterize hemodynamic and electric potential signals from the human brain. ISFs are known to correlate with the amplitude dynamics of fast (> 1 Hz) neuronal oscillations, and may arise from permeability
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bc7e1d381e5dec3fcf54fbdf331eae2f
https://doi.org/10.1101/2023.01.20.524831
https://doi.org/10.1101/2023.01.20.524831
Autor:
Vesa Kiviniemi, Lauri Raitamaa, Niko Huotari, Heta Helakari, Janne Kananen, Vesa Korhonen, Anssi Koivula
Publikováno v:
Human Brain Mapping
Physiological pulsations have been shown to affect the global blood oxygen level dependent (BOLD) signal in human brain. While these pulsations have previously been regarded as noise, recent studies show their potential as biomarkers of brain patholo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1369c81dd99f14259f33d25cae9a1dd4
https://doi.org/10.1002/hbm.25547
https://doi.org/10.1002/hbm.25547
Autor:
Janne, Kananen, Matti, Järvelä, Vesa, Korhonen, Timo, Tuovinen, Niko, Huotari, Lauri, Raitamaa, Heta, Helakari, Tommi, Väyrynen, Ville, Raatikainen, Maiken, Nedergaard, Hanna, Ansakorpi, Julia, Jacobs, Pierre, LeVan, Vesa, Kiviniemi
Publikováno v:
Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism. 42(10)
Respiratory brain pulsations have recently been shown to drive electrophysiological brain activity in patients with epilepsy. Furthermore, functional neuroimaging indicates that respiratory brain pulsations have increased variability and amplitude in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::cb9fcc1c775a941c9c9b276f578fbe6a
https://pubmed.ncbi.nlm.nih.gov/35570730
https://pubmed.ncbi.nlm.nih.gov/35570730