Author

Ahmed Elabasy

Oulu University HospitalORCID 0000-0001-9693-8965Unclaimed ORCID profile · follow to get notified of new preprints

Biology Disciplines

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Signature Assays, Organisms & Methods

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Organism:human· 3 Approach:statistical model· 3 Assay:imaging· 2 Research Focus:benchmarking· 1 Research Focus:cell-cell communication· 1 Assay:electronic health records· 1 Research Focus:spatial domain detection· 1

Frequent Co-Authors

Heta HelakariiD· 3 shared Johanna PiispalaiD· 3 shared Mika KallioiD· 3 shared Niko HuotariiD· 3 shared Tommi VäyryneniD· 3 shared Vesa J. KiviniemiiD· 3 shared Vesa O. KorhoneniD· 3 shared Johanna TuunaneniD· 2 shared

Activity by Year

2024-2026 · peak 1/yr

Co-Author Collaboration Network

10 top collaborators · 45 mutual co-author links

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3 shared papersNeuroscience

Heta HelakariORCID

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3 papers

Recent·Most cited

NeuroscienceJournal of NeurosciencePeer-reviewedJun 5, 2026

Infra-slow (<0.1 Hz) modulation of human brain pulsations in awake and sleep states

Tommi Väyrynen, Heta Helakari, Vesa O. Korhonen…·Vesa J. Kiviniemi

This study investigates cross-frequency oscillatory interactions in brain pulsations during awake and NREM-sleep states, revealing directional coordination mechanisms between infra-slow, respiratory, and cardiovascular oscillations.

DOI 10.1523/jneurosci.2282-25.2026

humanimaging

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NeurosciencebioRxivPreprintJan 9, 2025

Sleep increases propagation speed of physiological brain pulsations

Ahmed Elabasy, Heta Helakari, Tommi Väyrynen…·Vesa J. Kiviniemi

The paper measures CSF flow velocity during sleep and finds it increases due to stronger vasomotor and respiratory pulsations, while cardiovascular speed remains unchanged.

6 citations

humanimaging

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NeurosciencebioRxivPreprintOct 16, 2024

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

Tommi Väyrynen, Johanna Tuunanen, Heta Helakari…·Vesa J. Kiviniemi

The paper investigates how vasomotor pulsation drives cerebrospinal fluid and electrophysiological dynamics during sleep in humans.

6 citations

humanelectronic health records

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