J
Juha-Pekka Niskanen
Researcher at University of Eastern Finland
Publications - 15
Citations - 2925
Juha-Pekka Niskanen is an academic researcher from University of Eastern Finland. The author has contributed to research in topics: Functional magnetic resonance imaging & Principal component analysis. The author has an hindex of 7, co-authored 15 publications receiving 2406 citations.
Papers
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Journal ArticleDOI
Kubios HRV - Heart rate variability analysis software
Mika P. Tarvainen,Juha-Pekka Niskanen,Jukka A. Lipponen,Perttu O. Ranta-aho,Pasi A. Karjalainen +4 more
TL;DR: Kubios HRV is an advanced and easy to use software for heart rate variability (HRV) analysis that includes an adaptive QRS detection algorithm and tools for artifact correction, trend removal and analysis sample selection.
Journal ArticleDOI
Software for advanced HRV analysis
TL;DR: A computer program for advanced heart rate variability analysis that calculates all the commonly used time- and frequency-domain measures of HRV as well as the nonlinear Poincaré plot and parametric and nonparametric spectrum estimates are calculated.
Book ChapterDOI
Kubios HRV — A Software for Advanced Heart Rate Variability Analysis
Mika P. Tarvainen,Juha-Pekka Niskanen,Jukka A. Lipponen,Perttu O. Ranta-aho,Pasi A. Karjalainen +4 more
TL;DR: Together with a high-quality heart rate monitor, capable of recording beat-to-beat RR intervals, this freely distributed software forms a complete system for HRV analysis.
Journal ArticleDOI
Water spin dynamics during apoptotic cell death in glioma gene therapy probed by T1ρ and T2ρ
Alejandra Sierra,Shalom Michaeli,Juha-Pekka Niskanen,Piia Valonen,Heidi Gröhn,Seppo Ylä-Herttuala,Michael Garwood,Olli Gröhn +7 more
TL;DR: T1ρ and T2ρ MR imaging are useful tools to quantify early changes in water dynamics reflecting treatment response during gene therapy, consistent with destructive intracellular processes associated with cell death and the increase of extracellular space during the treatment.
Journal ArticleDOI
Monitoring functional impairment and recovery after traumatic brain injury in rats by FMRI.
Juha-Pekka Niskanen,Antti M. Airaksinen,Alejandra Sierra,Joanna K. Huttunen,Jari Nissinen,Pasi A. Karjalainen,Asla Pitkänen,Olli Gröhn +7 more
TL;DR: This is, to the authors' knowledge, the first study demonstrating that fMRI can be used to monitor post-TBI functional impairment and consequent spontaneous recovery, and the BOLD response was associated with the density of myelinated fibers in the S1, rather than with neurodegeneration.