Zobrazeno 1 - 10
of 20
pro vyhledávání: '"Juha Pekka Niskanen"'
Autor:
Pasi A. Karjalainen, Juha-Pekka Niskanen, Tiina Lyyra-Laitinen, Tomi Laitinen, Mika P. Tarvainen
Publikováno v:
EURASIP Journal on Advances in Signal Processing, Vol 2007 (2007)
Ventricular repolarization duration (VRD) is affected by heart rate and autonomic control, and thus VRD varies in time in a similar way as heart rate. VRD variability is commonly assessed by determining the time differences between successive R- and
Externí odkaz:
https://doaj.org/article/1bb88e0cb30e414682d067803a0a7e10
Autor:
Hanne Lappi, Stefanos Georgiadis, Johannes Lehtonen, Mika P. Tarvainen, Ari Pääkkönen, Juha-Pekka Niskanen, Pasi A. Karjalainen, Minna Valkonen-Korhonen
Publikováno v:
Infant Behavior and Development. 45:98-108
Little is known how the brain of the newborn infant responds to the postnatal nutrition and care. No systematic studies exist in which the effects of nutritional and non-nutritional sucking on the brain activity of the infant were compared. We record
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4274153f60df4e7de509e95c1223300e
https://doi.org/10.1016/j.infbeh.2016.10.005
https://doi.org/10.1016/j.infbeh.2016.10.005
Autor:
Carmen Barba, Gabriella Colicchio, Alejandra Sierra Lopez, Joanna K. Huttunen, Olli Gröhn, Asla Pitkänen, Xavier Ekolle Ndode-Ekane, Juha-Pekka Niskanen, Artem Shatillo, Antti M. Airaksinen
Publikováno v:
Journal of neurotrauma. 35(22)
Diagnosis of ongoing epileptogenesis and associated hyperexcitability after brain injury is a major challenge. Given that increased neuronal activity in the brain triggers a blood oxygenation level-dependent (BOLD) response in functional magnetic res
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::aba57b6a91e2d8df217cd6dd4bfa686a
https://pubmed.ncbi.nlm.nih.gov/30019618
https://pubmed.ncbi.nlm.nih.gov/30019618
Autor:
Alejandra Sierra, Joanna K. Huttunen, Pasi A. Karjalainen, Jari Nissinen, Olli Gröhn, Antti M. Airaksinen, Asla Pitkänen, Juha-Pekka Niskanen
Publikováno v:
Journal of Neurotrauma. 30:546-556
The present study was designed to test a hypothesis that functional magnetic resonance imaging (fMRI) can be used to monitor functional impairment and recovery after moderate experimental traumatic brain injury (TBI). Moderate TBI was induced by late
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c9bbdba4dc0ecfcbd819f50258d9fbb9
https://doi.org/10.1089/neu.2012.2416
https://doi.org/10.1089/neu.2012.2416
Autor:
Asla Pitkänen, Olli Gröhn, Joanna K. Huttunen, Shahryar K. Hekmatyar, Risto A. Kauppinen, Juha-Pekka Niskanen, Neil P. Jerome, Antti M. Airaksinen
Publikováno v:
Epilepsia. 53:1245-1253
Summary Purpose: To investigate how kainic acid–induced epileptiform activity is related to hemodynamic changes probed by blood oxygenation level–dependent functional magnetic resonance imaging (BOLD fMRI). Methods: Epileptiform activity was indu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5ff6560ecb52799ca00cc27c83585c7c
https://doi.org/10.1111/j.1528-1167.2012.03539.x
https://doi.org/10.1111/j.1528-1167.2012.03539.x
Autor:
Juha Pekka Niskanen, Eini Niskanen, Markku Penttonen, Olli Gröhn, Lauri J. Lehto, Antti M. Airaksinen, Joanna K. Huttunen
Publikováno v:
NMR in Biomedicine. 24:209-215
The aim of this study was to explain the temporal variations between subjects in the blood oxygenation level-dependent (BOLD) response. Somatosensory responses were elicited with the electrical forepaw stimulus at a frequency of 10 Hz in urethane-ane
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c706b9f997bd699f36d81dd2e2bf42b9
https://doi.org/10.1002/nbm.1575
https://doi.org/10.1002/nbm.1575
Autor:
Olli Gröhn, Joanna K. Huttunen, Antti M. Airaksinen, Juha Pekka Niskanen, Michael Garwood, Asla Pitkänen, Jari Nissinen, Ryan Chamberlain
Publikováno v:
Magnetic Resonance in Medicine. 64:1191-1199
Simultaneous electrophysiological and functional magnetic resonance imaging measurements of animal models of epilepsy are methodologically challenging, but essential to better understand abnormal brain activity and hemodynamics during seizures. In th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::beb9779bbdeb916bb979e9b52d5d4a99
https://doi.org/10.1002/mrm.22508
https://doi.org/10.1002/mrm.22508
Autor:
Michael Garwood, Juha Pekka Niskanen, Heidi Gröhn, Shalom Michaeli, Olli Gröhn, Risto A. Kauppinen, Kimmo Jokivarsi
Publikováno v:
Journal of Cerebral Blood Flow & Metabolism. 29:206-216
The rotating frame longitudinal relaxation magnetic resonance imaging (MRI) contrast, T1ρ, obtained with on-resonance continuous wave (CW) spin-lock field is a sensitive indicator of tissue changes associated with hyperacute stroke. Here, the rotati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::91f1bf90ffbe49932f51b7469ef212e5
https://doi.org/10.1038/jcbfm.2008.113
https://doi.org/10.1038/jcbfm.2008.113
Autor:
Hanne Lappi, Minna Valkonen-Korhonen, Stefanos Georgiadis, Mika P. Tarvainen, Pasi A. Karjalainen, Juha-Pekka Niskanen, Ari Pääkkönen, Johannes Lehtonen
Publikováno v:
Embodiment-ein innovatives Konzept für Entwicklungsforschung und Psychoanalyse
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bc62e432a02fbd4060e73be8a691de1a
https://doi.org/10.13109/9783666451300.113
https://doi.org/10.13109/9783666451300.113
Autor:
Jukka A. Lipponen, Juha-Pekka Niskanen, Pasi A. Karjalainen, Perttu O. Ranta-aho, Mika P. Tarvainen
Publikováno v:
Computer methods and programs in biomedicine. 113(1)
Kubios HRV is an advanced and easy to use software for heart rate variability (HRV) analysis. The software supports several input data formats for electrocardiogram (ECG) data and beat-to-beat RR interval data. It includes an adaptive QRS detection a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::94804642ec2d5f504ceabba97b8c659c
https://pubmed.ncbi.nlm.nih.gov/24054542
https://pubmed.ncbi.nlm.nih.gov/24054542