O
Olli V. Lounasmaa
Researcher at Helsinki University of Technology
Publications - 85
Citations - 8015
Olli V. Lounasmaa is an academic researcher from Helsinki University of Technology. The author has contributed to research in topics: Antiferromagnetism & Magnetoencephalography. The author has an hindex of 30, co-authored 85 publications receiving 7677 citations. Previous affiliations of Olli V. Lounasmaa include University of Helsinki.
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Magnetoencephalography—theory, instrumentation, and applications to noninvasive studies of the working human brain
TL;DR: The mathematical theory of the method is explained in detail, followed by a thorough description of MEG instrumentation, data analysis, and practical construction of multi-SQUID devices.
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Seeing speech: visual information from lip movements modifies activity in the human auditory cortex
Mikko Sams,Reijo Aulanko,Matti Hämäläinen,Riitta Hari,Olli V. Lounasmaa,Sing Teh Lu,Juha Simola +6 more
TL;DR: The results show that visual information from articulatory movements has an entry into the auditory cortex, which could be explained by activity in the supratemporal auditory cortex.
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122-channel squid instrument for investigating the magnetic signals from the human brain
A.I. Ahonen,Matti Hämäläinen,M. Kajola,Jukka Knuutila,P.P. Laine,Olli V. Lounasmaa,Lauri Parkkonen,J.T. Simola,Claudia D. Tesche +8 more
TL;DR: The Neuromag-122 system as discussed by the authors employs 122 planar first-order thin-film gradiometers in dual units with two exactly orthogonal channels at 61 measurement sites.
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Dynamics of brain activation during picture naming
TL;DR: This static view into the dynamics of cortical activation is expanded using the accurate spatio-temporal resolution of whole-head magnetoencephalography to show that during picture naming, the conversion from visual to symbolic representation progressed bilaterally from the occipital visual cortex towards temporal and frontal lobes.
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Recording and Interpretation of Cerebral Magnetic Fields
Riitta Hari,Olli V. Lounasmaa +1 more
TL;DR: This review presents results obtained mainly in the laboratory by means of an intermediate method, MEG, which reflects cortical activity of neuronal populations at the level of cytoarchitectonic areas, which can be used to study brain functions that are characteristically human.