Results 161 to 170 of about 3,887 (186)
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Excitation of visual cortex neurons by local intracortical microstimulation
Experimental Neurology, 1983The threshold current required for the excitation of visual cortex neurons in the vicinity (approximately 1 mm) of an intracortical stimulating electrode was measured as a function of the stimulus pulse duration in the anesthetized cat. For cortical neurons with latencies of activation from 0.4 to 3.4 ms and for stimulus pulse durations from 0.02 to 0 ...
S F, Ronner, B G, Lee
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A Miniaturized System for Spike-Triggered Intracortical Microstimulation in an Ambulatory Rat
IEEE Transactions on Biomedical Engineering, 2011This paper reports on a miniaturized system for spike-triggered intracortical microstimulation (ICMS) in an ambulatory rat. The head-mounted microdevice comprises a previously developed application-specific integrated circuit fabricated in 0.35-μm two-poly four-metal complementary metal-oxide-semiconductor technology, which is assembled and packaged on
David J Guggenmos +2 more
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High‐voltage compliant microelectrode array drivers for intracortical microstimulation
International Journal of Circuit Theory and Applications, 2015SummaryWe present in this paper two low‐power high‐impedance microelectrode array drivers (MEDs) dedicated for visual intracortical microstimulation. These output stages of a new microstimulator are highly configurable and able to deliver higher compliance voltage (20 V for anodic and cathodic phases) across microelectrode‐tissue interface impedance ...
Md. Hasanuzzaman +2 more
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Neuroengineering Tools For Studying The Effect Of Intracortical Microstimulation In Rodent Models
2018 40th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2018Intracortical microstimulation can be successfully used to manipulate neuronal activity and connectivity, thus representing a potentially powerful tool to steer neuroplasticity occurring after brain injury. Activity-dependent stimulation (ADS), in which the spikes recorded from a single neuron are used to trigger stimulation at another cortical ...
Alberto Averna +5 more
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Further study on the excitation of pyramidal tract cells by intracortical microstimulation
Experimental Brain Research, 1976The effective spread of stimulating current for pyramidal tract (PT) cells and fibers was studied using a method of cancelling the shock artifacts and the following results were obtained: 1. The excitability of PT axon collaterals was as high as that of PT cells. 2. These axon collaterals extended as far as 1.0 mm horizontally from the PT cells. 3. The
H, Asanuma, A, Arnold, P, Zarzecki
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Reversible relocation of representational boundaries of adult rats by intracortical microstimulation
NeuroReport, 1994Cortical reorganization of somatosensory maps of adult rats is not restricted to central, already cutaneous zones. A few hours of intracortical microstimulation (ICMS) at the boundaries of the hindpaw representation generated plastic reorganization beyond these functionally defined representational borders by inducing new skin field representations in ...
F, Spengler, H R, Dinse
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Detection psychophysics of intracortical microstimulation in rat primary somatosensory cortex
European Journal of Neuroscience, 2007AbstractA problem of purposeful intracortical microstimulation is the long duration of neuronal integration time and the associated complex temporal interactions of effects to individual pulses in trains. Here we investigated the effects of repetitive stimuli on perception.
Sergejus, Butovas, Cornelius, Schwarz
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A high-impedance microelectrode driver dedicated for visual intracortical microstimulation
2012 IEEE 55th International Midwest Symposium on Circuits and Systems (MWSCAS), 2012We present in this paper a high-impedance microelectrode driver dedicated for visual intracortical microstimulation. This highly-configurable output stage is able to deliver eight bipolar or sixteen monopolar stimulation simultaneously with a constant current amplitude. The maximum stimulation current is set to 100µA which reaches 98??A through a 100kΩ
Md. Hasanuzzaman +2 more
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Microstimulation with Chronically Implanted Intracortical Electrodes
2007Stimulating microelectrodes that penetrate into the brain afford a means of accessing the basic functional units of the central nervous system. Microstimulation in the region of the cerebral cortex that subserve vision may be an alternative, or an adjunct, to a retinal prosthesis, and may be particularly attractive as a means of restoring a semblance ...
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Supplementary eye field as defined by intracortical microstimulation: Connections in macaques
Journal of Comparative Neurology, 1990AbstractIn macaques, the frontal eye field and the recently defined supplementary eye field play a role in the production of eye movements. Whereas the structure and function of the frontal eye field are well understood, little is known about the supplementary eye field.
M F, Huerta, J H, Kaas
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