Search Results - "George, John S."

Conductivity Tensor Mapping of the Human Brain Using Diffusion Tensor MRI by Tuch, David S., Wedeen, Van J., Dale, Anders M., George, John S., Belliveau, John W.

“…Knowledge of the electrical conductivity properties of excitable tissues is essential for relating the electromagnetic fields generated by the tissue to the…”
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Rapid optical coherence tomography and recording functional scattering changes from activated frog retina by Yao, Xin-Cheng, Yamauchi, Angela, Perry, Beth, George, John S

“…Optical coherence tomography (OCT) has important potential advantages for fast functional neuroimaging. However, dynamic neuroimaging poses demanding…”
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Dynamic neuroimaging of retinal light responses using fast intrinsic optical signals by Yao, Xin-Cheng, George, John S.

“…Transient intrinsic optical responses associated with neural activation offer an attractive strategy for dynamic imaging of neural activity, and may provide a…”
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Modeling direct effects of neural current on MRI by Heller, Leon, Barrowes, Benjamin E., George, John S.

“…We investigate the effect of the magnetic field generated by neural activity on the magnitude and phase of the MRI signal in terms of a phenomenological…”
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Near-infrared imaging of fast intrinsic optical responses in visible light-activated amphibian retina by Yao, Xin-Cheng, George, John S

“…High performance functional imaging is needed for dynamic measurements of neural processing in retina. Emerging techniques for visual prosthesis also require…”
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Spatiotemporal Bayesian inference dipole analysis for MEG neuroimaging data by Jun, Sung C., George, John S., Paré-Blagoev, Juliana, Plis, Sergey M., Ranken, Doug M., Schmidt, David M., Wood, C.C.

“…Recently, we described a Bayesian inference approach to the MEG/EEG inverse problem that used numerical techniques to estimate the full posterior probability…”
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Model cortical association fields account for the time course and dependence on target complexity of human contour perception by Gintautas, Vadas, Ham, Michael I, Kunsberg, Benjamin, Barr, Shawn, Brumby, Steven P, Rasmussen, Craig, George, John S, Nemenman, Ilya, Bettencourt, Luís M A, Kenyon, Garrett T, Kenyon, Garret T

“…Can lateral connectivity in the primary visual cortex account for the time dependence and intrinsic task difficulty of human contour detection? To answer this…”
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A theory of the Benham Top based on center–surround interactions in the parvocellular pathway by Kenyon, Garrett T, Hill, Dan, Theiler, James, George, John S, Marshak, David W

“…A model color-opponent neuron was used to investigate the subjective colors evoked by the Benham Top (BT). Color-opponent inputs from cone-selective…”
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Bayesian brain source imaging based on combined MEG/EEG and fMRI using MCMC by Jun, Sung C., George, John S., Kim, Woohan, Paré-Blagoev, Juliana, Plis, Sergey, Ranken, Doug M., Schmidt, David M.

“…A number of brain imaging techniques have been developed in order to investigate brain function and to develop diagnostic tools for various brain disorders…”
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Spatio-temporal mapping of rat whisker barrels with fast scattered light signals by Rector, David M., Carter, Kathleen M., Volegov, Petr L., George, John S.

“…Optical techniques offer a number of potential advantages for imaging dynamic spatio-temporal patterns of activity in neural tissue. The methods provide the…”
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SQUID detected NMR in microtesla magnetic fields by Matlachov, Andrei N., Volegov, Petr L., Espy, Michelle A., George, John S., Kraus, Robert H.

“…We have built an NMR system that employs a superconducting quantum interference device (SQUID) detector and operates in measurement fields of 2–25 μT. The…”
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Cross-Polarized Reflected Light Measurement of Fast Optical Responses Associated with Neural Activation by Yao, Xin-Cheng, Foust, Amanda, Rector, David M., Barrowes, Benjamin, George, John S.

“…We developed an optical probe for cross-polarized reflected light measurements and investigated optical signals associated with electrophysiological activation…”
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Simultaneous magnetoencephalography and SQUID detected nuclear MR in microtesla magnetic fields by Volegov, Petr, Matlachov, Andrei N., Espy, Michelle A., George, John S., Kraus Jr, Robert H.

“…A system that simultaneously measures magnetoencephalography (MEG) and nuclear magnetic resonance (NMR) signals from the human brain was designed and…”
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Probabilistic forward model for electroencephalography source analysis by Plis, Sergey M, George, John S, Jun, Sung C, Ranken, Doug M, Volegov, Petr L, Schmidt, David M

“…Source localization by electroencephalography (EEG) requires an accurate model of head geometry and tissue conductivity. The estimation of source time courses…”
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Optical lever recording of displacements from activated lobster nerve bundles and Nitella internodes by Yao, Xin-Cheng, Rector, David M, George, John S

“…An optical lever was designed for studying physical displacements associated with electrophysiological activation of lobster nerve bundles. Stimulation current…”
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Simultaneous birefringence and scattered light measurements reveal anatomical features in isolated crustacean nerve by Carter, Kathleen M, George, John S, Rector, David M

“…Simultaneous fast birefringence and scattered light changes associated with crustacean nerve activation have different time courses and are produced by…”
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Correction: Model Cortical Association Fields Account for the Time Course and Dependence on Target Complexity of Human Contour Perception by Gintautas, Vadas, Ham, Michael I., Kunsberg, Benjamin, Barr, Shawn, Brumby, Steven P., Rasmussen, Craig, George, John S., Nemenman, Ilya, Bettencourt, Luís M. A., Kenyon, Garrett T.

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Bayesian inference applied to the electromagnetic inverse problem by Schmidt, David M., George, John S., Wood, C.C.

“…We present a new approach to the electromagnetic inverse problem that explicitly addresses the ambiguity associated with its ill‐posed character. Rather than…”
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Scattered-Light Imaging in Vivo Tracks Fast and Slow Processes of Neurophysiological Activation by Rector, David M., Rogers, Robert F., Schwaber, James S., Harper, Ronald M., George, John S.

“…We imaged fast optical changes associated with evoked neural activation in the dorsal brainstem of anesthetized rats, using a novel imaging device. The imager…”
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Finite difference iterative solvers for electroencephalography: serial and parallel performance analysis by Barnes, Derek N., George, John S., Ng, Kwong T.

“…Currently the resolution of the head models used in electroencephalography (EEG) studies is limited by the speed of the forward solver. Here, we present a…”
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