Zobrazeno 1 - 10
of 29
pro vyhledávání: '"Matti Kajola"'
Publikováno v:
International Congress Series. 1300:245-248
The total information derived from Shannon's theory of communication provides a completely new index to characterize multichannel MEG data. The measured data and sensor noises are first transformed into independent virtual channels. Thereafter, the t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ed15fdd86e2982e1836b5723202db898
https://doi.org/10.1016/j.ics.2007.01.058
https://doi.org/10.1016/j.ics.2007.01.058
Publikováno v:
IEEE Transactions on Signal Processing. 53:3359-3372
The reliability of biomagnetic measurements is traditionally challenged by external interference signals, movement artifacts, and comparison problems caused by different positions of the subjects or different sensor configurations. The Signal Space S
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0f09554fde75ddc620c3eeeaca1b3af8
https://doi.org/10.1109/tsp.2005.853302
https://doi.org/10.1109/tsp.2005.853302
Publikováno v:
International Congress Series. 1270:32-37
Conventional biomagnetic measurements suffer from the extreme sensitivity of the method to external and subject-related interference. Especially difficult to remove artifacts are caused by magnetic sources inside the shielded room and especially by m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::00d8fdef1361d2ed085f60a667e46284
https://doi.org/10.1016/j.ics.2004.05.004
https://doi.org/10.1016/j.ics.2004.05.004
Autor:
Oili Salonen, Matti Kajola, Jukka Knuutila, Hannu Tiitinen, Satu Tissari, Janne Sinkkonen, Juha Simola, Matti S. Hämälä:inen, Antti Ahonen, Carl-Gustaf Standertskjöld-Nordenstam, Teija Kujala, Juha Lavikainen, Minna Huotilainen, Risto Näätänen, Risto J. Ilmoniemi, Kimmo Alho
Publikováno v:
Aalto University
We used a whole-scalp magnetometer with 122 planar gradiometers to study the activity of the visual cortex of five blind humans deprived of visual input since early infancy. Magnetic responses were recorded to pitch changes in a sound sequence when t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7d6daaa7d2b2385340ae1f49f22f38cb
https://doi.org/10.1016/0304-3940(94)11135-6
https://doi.org/10.1016/0304-3940(94)11135-6
Autor:
Juha Wilenius, Jyrki P. Mäkelä, Ossi Miikkulainen, Andrey Zhdanov, Erik Larismaa, Ritva Paetau, Lauri Parkkonen, Antti Ahonen, Matti Kajola, Jaakko Lyytinen
Publikováno v:
IFMBE Proceedings ISBN: 9783642121968
Video-EEG is the gold standard in clinical epilepsy diagnostics. MEG systems have traditionally lacked video capabilities. Here we describe the addition of a synchronized digital video recording (DVR) system to a standard Elekta Neuromag® 306-channe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4963afcdc899ad119d8a27dd0a934859
https://doi.org/10.1007/978-3-642-12197-5_6
https://doi.org/10.1007/978-3-642-12197-5_6
Autor:
Jennifer L. Collinger, Matti Kajola, Doug Weber, Tao Song, Gustavo Sudre, Wei Wang, Ramana Vinjamuri, Anto Bagic, Alan D. Degenhart
Publikováno v:
IFMBE Proceedings ISBN: 9783642121968
Magnetoencephalography (MEG) is a non-invasive method to study brain functions with high temporal resolution. There is an emerging interest in studying the potential use of MEG for brain-machine interfaces (BMI) research. To date, the majority of stu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b2430c7c5d9b5f79af59aaa3eb91361d
https://doi.org/10.1007/978-3-642-12197-5_85
https://doi.org/10.1007/978-3-642-12197-5_85
Publikováno v:
Brain topography. 16(4)
Multichannel measurement with hundreds of channels oversamples a curl-free vector field, like the magnetic field in a volume free of sources. This is based on the constraint caused by the Laplace's equation for the magnetic scalar potential; outside
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::03f570b289237997120cc865475f1867
https://pubmed.ncbi.nlm.nih.gov/15379226
https://pubmed.ncbi.nlm.nih.gov/15379226
Autor:
Matti Kajola, Yung Yang Lin
Publikováno v:
The Canadian journal of neurological sciences. Le journal canadien des sciences neurologiques. 30(1)
Objective:To explore the somatosensory cortical responses to natural moving tactile stimulation in adult subjects using magnetoencephalography.Methods:We measured cortical somatosensory magnetic evoked fields (SEFs) to moving tactile stimuli by a bru
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5a138e195013a31d68c01ad9b94b3974
https://pubmed.ncbi.nlm.nih.gov/12619781
https://pubmed.ncbi.nlm.nih.gov/12619781
Publikováno v:
Brain Topography; Summer2004, Vol. 16 Issue 4, p269-275, 7p
Autor:
Riitta Hari, Antti Ahonen, Nina Forss, Marja-Liisa Granström, Matti Hämäläinen, Matti Kajola, Jukka Knuutila, Olli V. Lounasmaa, Jyrki P. Mäkelä, Ritva Paetau, Riitta Salmelin, Juha Simola
Publikováno v:
Europe PubMed Central
Whole-head magnetoencephalographic recordings revealed two parietal epileptic foci in homotopic areas of the hemispheres. The discharges occurred 17-20 ms later on the left than on the right hemisphere, implying the existence of a left-sided mirror f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bbc6a926da7f92a7e99583072b2ae23e
https://pubmed.ncbi.nlm.nih.gov/8280859
https://pubmed.ncbi.nlm.nih.gov/8280859