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. Author manuscript; available in PMC: 2014 Jan 28.
Published in final edited form as: IEEE Trans Biomed Circuits Syst. 2013 Apr;7(2):115–128. doi: 10.1109/TBCAS.2013.2255874

Fig. 17.

Fig. 17

Wirelessly recorded data from the neurosensing device implanted in a rhesus macaque monkey. (a) and (b) Threshold crossings across all channels can be reduced to a low-dimensional state space through principal component analysis (among other methods). We present such neural trajectories produced during free movement of monkey JV: scratching eye (blue), touching an apple (green) and turning head (purple). Circles represent centroids of trajectory during each movement. (c) A selection of 15/100 broadband recording channels demonstrating heterogeneity of the neural signals and the richness of high-sample rate data collection (20 kSps). (d) A raster plot (12 s) marking threshold-crossing timestamps for all input channels and behavior is indicated by color: scratching eye (blue), touching an apple (green) and turning head (purple).