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Cardiovascular and vasomotor pulsations in the brain and periphery during awake and NREM sleep in a multimodal fMRI study.
Tuunanen J, Helakari H, Huotari N, Väyrynen T, Järvelä M, Kananen J, Kivipää A, Raitamaa L, Ebrahimi SM, Kallio M, Piispala J, Kiviniemi V, Korhonen V. Tuunanen J, et al. Among authors: helakari h. Front Neurosci. 2024 Oct 8;18:1457732. doi: 10.3389/fnins.2024.1457732. eCollection 2024. Front Neurosci. 2024. PMID: 39440186 Free PMC article.
The relative brain signal variability increases in the behavioral variant of frontotemporal dementia and Alzheimer's disease but not in schizophrenia.
Tuovinen T, Häkli J, Rytty R, Krüger J, Korhonen V, Järvelä M, Helakari H, Kananen J, Nikkinen J, Veijola J, Remes AM, Kiviniemi V; Frontotemporal Lobar Degeneration Neuroimaging Initiative. Tuovinen T, et al. Among authors: helakari h. J Cereb Blood Flow Metab. 2024 Dec;44(12):1535-1549. doi: 10.1177/0271678X241262583. Epub 2024 Jun 19. J Cereb Blood Flow Metab. 2024. PMID: 38897598 Free PMC article.
Effect of sleep deprivation and NREM sleep stage on physiological brain pulsations.
Helakari H, Järvelä M, Väyrynen T, Tuunanen J, Piispala J, Kallio M, Ebrahimi SM, Poltojainen V, Kananen J, Elabasy A, Huotari N, Raitamaa L, Tuovinen T, Korhonen V, Nedergaard M, Kiviniemi V. Helakari H, et al. Front Neurosci. 2023 Dec 1;17:1275184. doi: 10.3389/fnins.2023.1275184. eCollection 2023. Front Neurosci. 2023. PMID: 38105924 Free PMC article.
Infra-slow fluctuations in cortical potentials and respiration drive fast cortical EEG rhythms in sleeping and waking states.
Väyrynen T, Helakari H, Korhonen V, Tuunanen J, Huotari N, Piispala J, Kallio M, Raitamaa L, Kananen J, Järvelä M, Matias Palva J, Kiviniemi V. Väyrynen T, et al. Among authors: helakari h. Clin Neurophysiol. 2023 Dec;156:207-219. doi: 10.1016/j.clinph.2023.10.013. Epub 2023 Nov 3. Clin Neurophysiol. 2023. PMID: 37972532 Free article.
Increased interictal synchronicity of respiratory related brain pulsations in epilepsy.
Kananen J, Järvelä M, Korhonen V, Tuovinen T, Huotari N, Raitamaa L, Helakari H, Väyrynen T, Raatikainen V, Nedergaard M, Ansakorpi H, Jacobs J, LeVan P, Kiviniemi V. Kananen J, et al. Among authors: helakari h. J Cereb Blood Flow Metab. 2022 Oct;42(10):1840-1853. doi: 10.1177/0271678X221099703. Epub 2022 May 14. J Cereb Blood Flow Metab. 2022. PMID: 35570730 Free PMC article.
Human NREM Sleep Promotes Brain-Wide Vasomotor and Respiratory Pulsations.
Helakari H, Korhonen V, Holst SC, Piispala J, Kallio M, Väyrynen T, Huotari N, Raitamaa L, Tuunanen J, Kananen J, Järvelä M, Tuovinen T, Raatikainen V, Borchardt V, Kinnunen H, Nedergaard M, Kiviniemi V. Helakari H, et al. J Neurosci. 2022 Mar 23;42(12):2503-2515. doi: 10.1523/JNEUROSCI.0934-21.2022. Epub 2022 Feb 8. J Neurosci. 2022. PMID: 35135852 Free PMC article.
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