Nathalia L.V. Peixoto

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This work presents some results obtained within the process of fabrication of silicon microstructures for neuro-electronics applications. The microstructures are basically arrays of cavities in which culture of neuronal cells can be carried out. The cavities are connected to each other by channels intended to guide axons growth. The system includes(More)
We present here two manipulations done on the perjkion solution during the propagation of the spreading depression waves in the in-vitro chicken retina. For the first time, the electro-physiological and optical signals were acquired simultaneously. Comparing both of them, we show the relationship of the characteristic slow potential ship to the brightness(More)
. We present here the results of electrical stimulation of the retina of chicken embryos (E16 to E20). The stimulation is performed by means of planar microelectrode arrays positioned on the inner limiting membrane. The objective is to evaluate the funcional properties of the implants and investigate firing patterns of ganglion cells as a function of the(More)
This paper presents some results on the correlation between the electrophysiological and intrinsic optical signals (IOS) of spreading depression waves in chicken retinae. We first show that the peak of the time derivative of the electrophysiological wave occurs precisely when the optical signal reaches the electrode tip. Second, by comparing bath(More)
This paper reports results on the fabrication and electrical characterization of silicon microstructures for use in biological neuronal culturing studies. Structures are cavities for neuron allocation and contain gold microelectrodes, as well as resistors for local heating and diodes for temperature monitoring. In this way, one can control culture(More)
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