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. Author manuscript; available in PMC: 2009 Nov 25.
Published in final edited form as: IEEE Trans Neural Syst Rehabil Eng. 2009 Feb 3;17(2):116–127. doi: 10.1109/TNSRE.2009.2012711

Fig. 5.

Fig. 5

(a) Schematic of encoding 2-D, nongoal-directed arm movement: the sample network of neurons is randomly connected with positive (excitatory), and negative (inhibitory) connections. Right panel demonstrates a symbolic movement trajectory to indicate the movement parameter encoded in the neural population model. Sample firing rates and corresponding spike trains are shown to illustrate the distinct firing patterns that would be obtained with broad and sharp tuning characteristics. (b) Sample tuning characteristics (over a partial range) of a subset of the 50 neurons modeled with randomly chosen directions and widths. (c) Sample 3-s raster plot of spike trains obtained from the population model.