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Destination puissance - Cohorte 1

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Zeck Vector T3 Pdf !EXCLUSIVE! Download

To find the edges of the imaged area, we converted the image of the dish into a binary array by applying a threshold to the pixel values. To minimize background leakage, we then reduced the area of the dish to be imaged by deleting pixels with an intensity less than the mean minus two standard deviations, as previously described [24]. For analysis of the area, we identified structures by thresholding the foreground images and filling holes. The threshold was set at 50% of the mean foreground intensity to exclude background noise. We then measured the area of the structures. We manually identified the largest dendritic tree in the dish and selected a 30 30 pixel grid across the dendritic tree at a distance of about two to three dendritic branches from the cell body. We then averaged the pixel intensity in each pixel of the grid for each time and plotted the pixel intensities of all the pixels along with their corresponding eigenvector as a response map. All further analysis was performed in MATLAB (Nat. Math. Soc. of Japan).

zeck vector t3 pdf download


Results: By comparing the original and the reconstructed eigenvectors using the PDE, we can identify transformed stimulation patterns that provide additional information regarding the specificity of RGC and non-RGC responses ( Fig. 4 ). For example, cell #1 in Fig. 4A clearly only responds to the flashing dot stimulus. The reconstructed spike-triggered pattern had no spikes and resulted in an almost flat profile. The reconstruction process offers two options, that is, neither the original nor the reconstructed pulse (or cosine) patterns closely resemble the actual stimulation patterns, as shown in Fig. 4D. In contrast, RGCs # 3, #4, #5, #6, #10, and #18 respond only to the spatial patterns, resembling original stimulation patterns. We also found that, in many cases, some RGCs increased or decreased their average firing rates as well as their peak firing rates. These cells increased or decreased their mean firing rates, respectively, when directly stimulated with the input profiles from the PDE, but their firing rates were barely affected by the locally reconstructed dot/cosine patterns.

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