WorldCat Identities

Okada, Yoshio

Overview
Works: 24 works in 59 publications in 2 languages and 66 library holdings
Genres: Conference papers and proceedings 
Roles: Author, Editor
Publication Timeline
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Most widely held works by Yoshio Okada
Magnetoencephalography: an emerging neuroimaging tool for studying normal and abnormal human brain development by Hubert Preissl( Book )

1 edition published in 2015 in Undetermined and held by 17 WorldCat member libraries worldwide

Research on the human brain development has seen an upturn in the past years mostly due to novel neuroimaging tools that became available to study the anatomy and function of the developing brain. Magnetic Resonance Imaging (MRI) and Diffusion Tensor Imaging (DTI) are beginning to be used more frequently in children to determine the gross anatomy and structural connectivity of their brain. Functional MRI and Near-Infrared Spectroscopy (NIRS) determine the hemodynamics and electroencephalography (EEG) the electrophysiological functions of the developing human brain. Magnetoencephalography (MEG) complements EEG as the only other technique capable of directly measuring the developing brain electrophysiology. Although MEG is still being used relatively rarely in pediatric studies, the recent development in this technology is beginning to demonstrate its utility in both basic and clinical neurosciences. MEG seems to be quite attractive for pediatric use, since it measures the human brain activity in an entirely passive manner without possessing any conceivable risk to the developing tissue. MEG sessions generally require minimal patient preparation, and the recordings are extremely well tolerated from children. Biomagnetic techniques also offer an indirect way to assess the functional brain and heart activity of fetuses in humans in utero by measuring the magnetic field outside the maternal abdomen. Magnetic field produced by the electrical activity in the heart and brain of the fetus is not attenuated by the vernix, a waxy film covering its entire skin. A biomagnetic instrument specifically designed for fetal studies has been developed for this purpose. Fetal MEG studies using such a system have shown that both spontaneous brain activity and evoked cortical activity can be measured from outside the abdomen of pregnant mothers. Fetal MEG may become clinically very useful for implementation and evaluation of intervention programs in at-risk populations. Biomagnetic instruments have also been developed for specifically measuring the brain activity in newborns, infants and older children. MEG studies have shown the usefulness of MEG for localizing active regions in the brain and also for tracking the longitudinal maturation of various sensory systems. Studies of pediatric patients are beginning to show interesting functional pathology in autism spectrum disorder, cerebral palsy, epilepsy and other types of neurological and psychiatric disorders (Down syndrome, tra
Chūgakkō sūgaku 3( Book )

9 editions published between 1997 and 2016 in Japanese and held by 6 WorldCat member libraries worldwide

Chūgakkō sūgaku 1( Book )

9 editions published between 1997 and 2016 in Japanese and held by 6 WorldCat member libraries worldwide

Chūgakkō sūgaku 2( Book )

9 editions published between 1997 and 2016 in Japanese and held by 6 WorldCat member libraries worldwide

Murasakisō : Edo shōhyōshū by Murao Okada( Book )

3 editions published in 1916 in Japanese and held by 3 WorldCat member libraries worldwide

Ikari no iran( Book )

3 editions published in 1972 in Japanese and held by 2 WorldCat member libraries worldwide

Kiki ni tatsu minshu shugi( Book )

3 editions published in 1957 in Japanese and held by 2 WorldCat member libraries worldwide

Marukusu to gendai( Book )

3 editions published in 1969 in Japanese and held by 2 WorldCat member libraries worldwide

Kiki no naka no gikai seiji( Book )

2 editions published in 1964 in Japanese and held by 2 WorldCat member libraries worldwide

Gikai seiji no hōkai to shakai shugi( Book )

3 editions published in 1978 in Japanese and held by 2 WorldCat member libraries worldwide

Kokyuki shikkan to sono bisai kozo. [Ultrastructural aspects of the lung and its disorders by Yoshio Okada( Book )

1 edition published in 1975 in Japanese and held by 2 WorldCat member libraries worldwide

The encoding and retention processes underlying judgment of spatial locations by Yoshio Okada( )

1 edition published in 1979 in English and held by 1 WorldCat member library worldwide

Kyō no shirubāi by Yoshio Okada( Book )

1 edition published in 2002 in Japanese and held by 1 WorldCat member library worldwide

Mushi o mede i o kataru by Yoshio Okada( Book )

1 edition published in 1997 in Japanese and held by 1 WorldCat member library worldwide

Haigan : sono naritachi to rinshō by Yoshio Okada( Book )

1 edition published in 1972 in Japanese and held by 1 WorldCat member library worldwide

International Symposium on Cell Engineering by International Symposium on Cell Engineering( Book )

1 edition published in 1982 in English and held by 1 WorldCat member library worldwide

Nihon koji monogatari by Yasaburō Ikeda( Book )

1 edition published in 2009 in Japanese and held by 1 WorldCat member library worldwide

Kokoku to ijintachi by Yoshio Okada( Book )

1 edition published in 1993 in Japanese and held by 1 WorldCat member library worldwide

Biomag 96 Volume 1/Volume 2 Proceedings of the Tenth International Conference on Biomagnetism by Cheryl J Aine( )

1 edition published in 2000 in English and held by 0 WorldCat member libraries worldwide

A modified Linear Estimation Approach was performed to reconstruct current sources within the heart. Based on MRI data sets the Boundary Element Method was used to create tailored multicompartment models of the human thorax which were used to solve the forward problem of magnetocardiography. The ability of the proposed method was demonstrated for the localization of a single current dipole as an example of a focal source. By means of introducing small shiftings to all reconstruction dipoles during linear estimation solution as well as performing a successive focussing strategy ignoring places without significant electrical activity the method could easily be extended to the reconstruction of real 3D sources. Based on a special minimum-norm solution the source volume can be estimated applying a finite element approximation using cube elements. The size of an extended current source can be estimated by superimposing the reconstructed dipoles to an equivalent dipole and comparing the corresponding volume with the sphere which would be related to the equivalent dipole. The deviation of these volumes can be taken as a criterion for non-dipolarity of sources
 
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