Author

Tommi Väyrynen

Observed names: T Väyrynen, T. Vayrynen, T. Väyrynen

Institutions: Oulu University Hospital, University of Oulu

Observed institutions: Oulu University Hospital, University of Oulu

ORCID: 0000-0003-4123-5917

Observed ORCID: 0000-0003-4123-5917

OpenAlex ID: A5065582828

Human NREM Sleep Promotes Brain-Wide Vasomotor and Respiratory Pulsations

2022 · Heta Helakari, Vesa Korhonen, et al. · Journal of Neuroscience · 130

Effect of sleep deprivation and NREM sleep stage on physiological brain pulsations

2023 · Heta Helakari, Matti Järvelä, et al. · Frontiers in Neuroscience · 47

Increased interictal synchronicity of respiratory related brain pulsations in epilepsy

2022 · Janne Kananen, Matti Järvelä, et al. · Journal of Cerebral Blood Flow & Metabolism · 26

Infra-slow fluctuations in cortical potentials and respiration drive fast cortical EEG rhythms in sleeping and waking states

2023 · Tommi Väyrynen, Heta Helakari, et al. · Clinical Neurophysiology · 23

Cardiovascular and vasomotor pulsations in the brain and periphery during awake and NREM sleep in a multimodal fMRI study

2024 · Johanna Tuunanen, Heta Helakari, et al. · Frontiers in Neuroscience · 19

Ultrafast Imaging of Physiological Brain Pulsations With Magnetic Resonance Encephalography—From Noise to Predictive Clinical Biomarker

2025 · Vesa Kiviniemi, Heta Helakari, et al. · NMR in Biomedicine · 11

Sleep Alters the Velocity of Physiological Brain Pulsations in Humans

2026 · Ahmed Elabasy, Heta Helakari, et al. · Advanced Science · 9

Orexin effect on physiological pulsations of the human brain

2025 · Matti Järvelä, Janne Kananen, et al. · Proceedings of the National Academy of Sciences · 8

Ultrafast complex-valued 4D fMRI reveals sleep-induced brain respiratory pulsation changes in both magnitude and phase signals

2025 · Saara Sofia Syväoja, Lauri Raitamaa, et al. · NeuroImage · 7

Sleep increases propagation speed of physiological brain pulsations

2025 · Ahmed Elabasy, Heta Helakari, et al. · bioRxiv (Cold Spring Harbor Laboratory) · 6

Vasomotor Pulsation Becomes a Driver of Cerebrospinal Fluid and Electrophysiological Dynamics in Sleeping Human Brain

2024 · Tommi Väyrynen, Johanna Tuunanen, et al. · bioRxiv (Cold Spring Harbor Laboratory) · 6

Sleep alters neurovascular and hydrodynamic coupling in the human brain

2026 · Tommi Väyrynen, Johanna Tuunanen, et al. · Proceedings of the National Academy of Sciences · 5

Sleep-specific changes in physiological brain pulsations

2020 · H Helakari, V Korhonen, et al. · bioRxiv (Cold Spring Harbor Laboratory) · 4

Reduced harmonic complexity of brain parenchymal cardiovascular pulse waveforms in Alzheimer’s disease

2025 · Anssi Koivula, Vilma Perkiömäki, et al. · NeuroImage · 3

Vasomechanic treatment increases efflux of human brain proteins

2026 · Johanna Tuunanen, Katariina Hautamäki, et al. · medRxiv · 1

Sleep specific changes in infra-slow and respiratory frequency drivers of cortical EEG rhythms

2023 · Tommi Väyrynen, Heta Helakari, et al. · bioRxiv (Cold Spring Harbor Laboratory) · 1

Amplitude of physiological brain pulsations in Alzheimer’s disease

2026 · Vilma Perkiömäki, Lauri Raitamaa, et al. · Research Square

Infra-slow (<0.1 Hz) Modulation of Human Brain Pulsations in Awake and Sleep States

2026 · Tommi Väyrynen, Heta Helakari, et al. · Journal of Neuroscience

Increased intracranial very low frequency pulsation power in central brain regions of high-functioning young adults with autism spectrum disorder

2026 · Katariina Laurén, Matti Järvelä, et al. · NeuroImage

Increased vasomotor waves inverts electro-hydrodynamic drive over blood-brain-barrier in sleep.

2025 · Vesa Kiviniemi, Tommi Väyrynen, et al. · Proceedings on CD-ROM - International Society for Magnetic Resonance in Medicine. Scientific Meeting and Exhibition/Proceedings of the International Society for Magnetic Resonance in Medicine, Scientific Meeting and Exhibition

Brain electro/hydrodynamic drive of vasomotor waves inverts locally in NREM sleep.

2024 · Tommi Väyrynen, Heta Helakari, et al. · Proceedings on CD-ROM - International Society for Magnetic Resonance in Medicine. Scientific Meeting and Exhibition/Proceedings of the International Society for Magnetic Resonance in Medicine, Scientific Meeting and Exhibition

Accuracy of Computerized Radiation Treatment Planning

1980 · T. Vayrynen · Japanese Journal of Radiological Technology

Accuracy of Computerized Radiation Treatment Planning

1979 · T. Väyrynen, K. Kiviniitty, et al. · Acta Radiologica Oncology Radiation Physics Biology

Works count: 23

Citation count: 306

H-index: 8

I10-index: 6