I work at the BioMag laboratory as a researcher/graduate student, focusing mostly on mathematical methods related to MEG (magnetoencephalography).
I graduated from Helsinki University of Technology in the beginning of 2005.
NOTE: unfortunately there is an error in the gradient formulas on page 47. In the phi component of both gradient vectors, sin(theta) should be replaced by 1/sin(theta).
The new Signal Space Separation (SSS) method developed by Samu Taulu and others is used for removing artefacts from MEG data. In this work, it was implemented for a new 76-channel MEG instrument. The work was done in Yoshio Okada's MEG laboratory in Albuquerque, New Mexico.The following are so-called "special assignments" (erikoistyö in Finnish) from my undergraduate studies. Nothing too special about them...
Electrophysiological studies of neonatal sleep
stages. (PDF)
Some basic infant
EEG, MEG and ECG analysis.
Phase resetting in EEG event-related potentials.
(PDF)
This is a simulation based
commentary on Scott Makeig's Science paper.
(Makeig et al:
Dynamic brain sources of visual evoked responses. Science
295:690-694)
Polygrafian mittaaminen ja visualisointi
itseorganisoituvalla kartalla (in Finnish). (PDF)
Teuvo Kohonen's Self-Organizing
Map is used to classify awakeness states from a polygraphic
recording.
Y. Okada, K. Pratt, J. Nurminen, and D. Paulson. "BabySQUID: A mobile, high-resolution multichannel magnetoencephalography system for neonatal brain assessment". Review of Scientific Instruments 77, 024301-1 - 9, (2006).
J. Nurminen, Y. Okada, "Evaluation of SSS for a 76-channel MEG instrument", Proceedings of the 14th International Conference on Biomagnetism, Boston, USA, 2004. p. 659.
E. Pihko, L. Lauronen, H. Wikström, S. Taulu, J. Nurminen, S. Kivitie-Kallio, and Y. Okada, "Somatosensory evoked potentials and magnetic fields elicited by tactile stimulation of the hand during active and quiet sleep in newborns", Clinical Neurophysiology 115, 448-455, (2004).
S.L. Joutsiniemi, J. Nurminen, and T. Kohonen, "SOM in detecting sleep and wakefulness in polysomnographic data", Proc. of Fourth International Conference on Neural Networks and Expert Systems in Medicine and Healthcare,Milos Island, Greece, September 20-22, 2001. pp. 97-101.
California (2004).
email: jussi.nurminen at iki.fi
work phone: +358-9-47175542