Search Results - "Weiland, J D"

Pattern electrical stimulation of the human retina by Humayun, Mark S., de Juan Jr, Eugene, Weiland, James D., Dagnelie, Gislin, Katona, Steve, Greenberg, Robert, Suzuki, Satoshi

“…Experiments were conducted to study if electrical stimulation of the retinal surface can elicit visual sensation in individuals blind from end-stage retinitis…”
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Chronic neural stimulation with thin-film, iridium oxide electrodes by Weiland, J.D., Anderson, D.J.

“…Experiments were conducted to assess the effect of chronic stimulation on the electrical properties of the electrode-tissue system, as measured using…”
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Elastic and viscoelastic characterization of agar by Nayar, V.T., Weiland, J.D., Nelson, C.S., Hodge, A.M.

“…Agar is a biological polymer, frequently used in tissue engineering research; due to its consistency, controllable size, and concentration-based properties, it…”
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Long-Term Histological and Electrophysiological Results of an Inactive Epiretinal Electrode Array Implantation in Dogs by Majji, Ajit B, Humayun, Mark S, Weiland, James D, Suzuki, Satoshi, D’Anna, Salvatore A, de Juan, Eugene, Jr

“…Short-term pattern electrical stimulation of the retina via multielectrode arrays in humans blind from photoreceptor loss has shown that ambulatory vision and…”
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Visual and electrical evoked response recorded from subdural electrodes implanted above the visual cortex in normal dogs under two methods of anesthesia by Margalit, E, Weiland, J.D, Clatterbuck, R.E, Fujii, G.Y, Maia, M, Tameesh, M, Torres, G, D'Anna, S.A, Desai, S, Piyathaisere, D.V, Olivi, A, de Juan, E, Humayun, Mark S

“…Sensitive methods are required to record electrical evoked potentials over the visual cortex to evaluate the efficacy and safety of a retinal prosthesis before…”
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Response to ‘Technology for mobility in SCI ten years from now’ by Humayun, M S, Weiland, J D

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Understanding the origin of visual percepts elicited by electrical stimulation of the human retina by WEILAND, J. D, HUMAYUN, M. S, DAGNELIE, G, DE JUAN, E. JR, GREENBERG, R. J, ILIFF, N. T

“…The success of a retinal prosthesis for patients with outer retinal degeneration (ORD) depends on the ability to electrically stimulate retinal cells other…”
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Finite element modeling of retinal prosthesis mechanics by Basinger, B C, Rowley, A P, Chen, K, Humayun, M S, Weiland, J D

“…Epiretinal prostheses used to treat degenerative retina diseases apply stimulus via an electrode array fixed to the ganglion cell side of the retina…”
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In vitro electrical properties for iridium oxide versus titanium nitride stimulating electrodes by Weiland, J.D., Anderson, D.J., Humayun, M.S.

“…Stimulating electrode materials must be capable of supplying high-density electrical charge to effectively activate neural tissue. Platinum is the most…”
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Continuous electrical stimulation decreases retinal excitability but does not alter retinal morphology by Ray, A, Lee, E-J, Humayun, M S, Weiland, J D

“…Retinal prostheses aim to provide visual perception through electrical stimulation of the retina. Hence they have to operate between threshold charge density…”
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Pathology of damaging electrical stimulation in the retina by Colodetti, L., Weiland, J.D., Colodetti, S., Ray, A., Seiler, M.J., Hinton, D.R., Humayun, M.S.

“…The goal of this study was to examine the characteristics of electrically induced retinal damage. A retinal prosthesis must be both effective and safe, but…”
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Perceptual thresholds and electrode impedance in three retinal prosthesis subjects by Mahadevappa, M., Weiland, J.D., Yanai, D., Fine, I., Greenberg, R.J., Humayun, M.S.

“…Three test subjects blind from retinitis pigmentosa were implanted with retinal prostheses as part of a FDA-approved clinical trial. The implant consisted of…”
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A variable range bi-phasic current stimulus driver circuitry for an implantable retinal prosthetic device by Sivaprakasam, M., Wentai Liu, Humayun, M.S., Weiland, J.D.

“…This paper reports a driver circuitry to generate bi-phasic (anodic and cathodic) current pulses for stimulating the retinal layer through electrodes which is…”
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An optimal design methodology for inductive power link with class-E amplifier by Kendir, G.A., Wentai Liu, Guoxing Wang, Sivaprakasam, M., Bashirullah, R., Humayun, M.S., Weiland, J.D.

“…This paper presents a design methodology of a highly efficient power link based on Class-E driven, inductively coupled coil pair. An optimal power link design…”
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Retinal Prosthesis for the Blind by Margalit, Eyal, Maia, Mauricio, Weiland, James D, Greenberg, Robert J, Fujii, Gildo Y, Torres, Gustavo, Piyathaisere, Duke V, O'Hearn, Thomas M, Liu, Wentai, Lazzi, Gianluca, Dagnelie, Gislin, Scribner, Dean A, de Juan, Eugene, Humayun, Mark S

“…Most of current concepts for a visual prosthesis are based on neuronal electrical stimulation at different locations along the visual pathways within the…”
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A neuro-stimulus chip with telemetry unit for retinal prosthetic device by Liu, W., Vichienchom, K., Clements, M., DeMarco, S.C., Hughes, C., McGucken, E., Humayun, M.S., De Juan, E., Weiland, J.D., Greenberg, R.

“…In this retinal prosthesis project, a rehabilitative device is designed to replace the functionality of defective photoreceptors in patients suffering from…”
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Survivorship analysis of pedicle spinal instrumentation by McAfee, P C, Weiland, D J, Carlow, J J

“…Between 1985 and 1989, the senior author performed 120 consecutive pedicle instrumentation cases--78 Steffee (VSP) procedures and 42 procedures using…”
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Computed SAR and thermal elevation in a 0.25-mm 2-D model of the human eye and head in response to an implanted retinal stimulator - part I: models and methods by DeMarco, S.C., Lazzi, G., Wentai Liu, Weiland, J.D., Humayun, M.S.

“…Retinitis pigmentosa and age-related macular degeneration lead to blindness through progressive loss of retinal photoreceptors. Attempts are under way to…”
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Visually Guided Performance of Simple Tasks Using Simulated Prosthetic Vision by Hayes, Jasmine S., Yin, Vivian T., Piyathaisere, Duke, Weiland, James D., Humayun, Mark S., Dagnelie, Gislin

“…:  Loss of photoreceptor cells is one of the major causes of blindness. Several groups are exploring the functional replacement of photoreceptors by a retinal…”
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Improved electrode material for deep brain stimulation by Petrossians, A., Whalen, J. J., Weiland, J. D.

“…Deep brain stimulation (DBS) devices have been implanted for treatment of basic tremor, Parkinson's disease and dystonia. These devices use electrodes in…”
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