S
Sampsa Vanhatalo
Researcher at University of Helsinki
Publications - 224
Citations - 7571
Sampsa Vanhatalo is an academic researcher from University of Helsinki. The author has contributed to research in topics: Electroencephalography & Medicine. The author has an hindex of 42, co-authored 195 publications receiving 6414 citations. Previous affiliations of Sampsa Vanhatalo include University of Eastern Finland & University of Washington.
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Infraslow oscillations modulate excitability and interictal epileptic activity in the human cortex during sleep
TL;DR: These findings suggest that the infraslow oscillations represent a slow, cyclic modulation of cortical gross excitability, providing also a putative mechanism for the as yet enigmatic aggravation of epileptic activity during sleep.
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Spatial spectra of scalp EEG and EMG from awake humans.
TL;DR: Spatial spectral peaks suggest that optimal scalp electrode spacing might be approximately 1cm to capture non-local EEG components having the texture of gyri, as an alternative to network approaches that decompose EEG into localized, modular signals for correlation and coherence.
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Evaluation of commercially available electrodes and gels for recording of slow EEG potentials.
TL;DR: The results provide rigorous criteria for choosing DC-stable electrodes and gels for DC-Coupled or long time-constant AC-coupled recordings of slow EEG potentials.
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Development of neonatal EEG activity: From phenomenology to physiology
Sampsa Vanhatalo,Kai Kaila +1 more
TL;DR: A simple, neurophysiologically and neuroanatomically based framework for neonatal EEG interpretation is proposed, composed of two developmental trajectories: one related to discrete spontaneous activity transients (SAT) and the other to the ongoing, apparently oscillatory EEG activity.
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Experimental febrile seizures are precipitated by a hyperthermia-induced respiratory alkalosis.
Sebastian Schuchmann,Dietmar Schmitz,Claudio Rivera,Sampsa Vanhatalo,Benedikt Salmen,Ken Mackie,Sampsa T. Sipilä,Juha Voipio,Kai Kaila +8 more
TL;DR: It is shown that hyperthermia causes respiratory alkalosis in the immature brain, with a threshold of 0.2–0.3 pH units for seizure induction, which indicates a mechanism for triggering hyperthermic seizures and suggests new strategies in the research and therapy of fever-related epileptic syndromes.