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Heta Helakari

Observed names: H Helakari, H. Helakari, Helakari Heta, Heta, Helakari
ORCID: 0000-0002-4354-4687
Observed ORCID: 0000-0002-4354-4687
OpenAlex ID: A5079426655
Human NREM Sleep Promotes Brain-Wide Vasomotor and Respiratory Pulsations
2022 · Heta Helakari, Vesa Korhonen, et al. · Journal of Neuroscience · 130
Sampling Rate Effects on Resting State fMRI Metrics
2019 · Niko Huotari, Lauri Raitamaa, et al. · Frontiers in Neuroscience · 101
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Spectral analysis of physiological brain pulsations affecting the BOLD signal
2021 · Lauri Raitamaa, Niko Huotari, et al. · Human Brain Mapping · 59
The variability of functional MRI brain signal increases in Alzheimer's disease at cardiorespiratory frequencies
2020 · Timo Tuovinen, Janne Kananen, et al. · Scientific Reports · 57
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Effect of sleep deprivation and NREM sleep stage on physiological brain pulsations
2023 · Heta Helakari, Matti Järvelä, et al. · Frontiers in Neuroscience · 47
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Spectral entropy indicates electrophysiological and hemodynamic changes in drug-resistant epilepsy – A multimodal MREG study
2019 · H. Helakari, J. Kananen, et al. · NeuroImage Clinical · 40
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Altered physiological brain variation in drug‐resistant epilepsy
2018 · Janne Kananen, Timo Tuovinen, et al. · Brain and Behavior · 32
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Respiratory-related brain pulsations are increased in epilepsy—a two-centre functional MRI study
2020 · Janne Kananen, Heta Helakari, et al. · Brain Communications · 29
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Breath hold effect on cardiovascular brain pulsations – A multimodal magnetic resonance encephalography study
2018 · Lauri Raitamaa, Vesa Korhonen, et al. · Journal of Cerebral Blood Flow & Metabolism · 28
Increased interictal synchronicity of respiratory related brain pulsations in epilepsy
2022 · Janne Kananen, Matti Järvelä, et al. · Journal of Cerebral Blood Flow & Metabolism · 26
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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
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Spectral entropy provides separation between Alzheimer’s disease patients and controls: a study of fNIRS
2022 · H. Ferdinando, S. Moradi, et al. · The European Physical Journal Special Topics · 19
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Dynamic lag analysis reveals atypical brain information flow in autism spectrum disorder
2019 · Ville Raatikainen, Vesa Korhonen, et al. · Autism Research · 19
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Hypertension Does Not Alter the Increase in Cardiac Baroreflex Sensitivity Caused by Moderate Cold Exposure
2016 · Heidi E. Hintsala, Antti M. Kiviniemi, et al. · Frontiers in Physiology · 18
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Inverse correlation of fluctuations of cerebral blood and water concentrations in humans
2021 · Viola Borchardt, Vesa Korhonen, et al. · The European Physical Journal Plus · 15
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Cardiovascular Pulsatility Increases in Visual Cortex Before Blood Oxygen Level Dependent Response During Stimulus
2022 · Niko Huotari, Johanna Tuunanen, et al. · Frontiers in Neuroscience · 14
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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
Association of body-mass index with physiological brain pulsations across adulthood – a fast fMRI study
2024 · Lauri Raitamaa, Joona Kautto, et al. · International Journal of Obesity · 9
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Orexin effect on physiological pulsations of the human brain
2025 · Matti Järvelä, Janne Kananen, et al. · Proceedings of the National Academy of Sciences · 8
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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
The relative brain signal variability increases in the behavioral variant of frontotemporal dementia and Alzheimer’s disease but not in schizophrenia
2024 · Timo Tuovinen, Jani Häkli, et al. · Journal of Cerebral Blood Flow & Metabolism · 6
Works count: 44
Citation count: 759
H-index: 15
I10-index: 18
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