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Figure 4 | BMC Neuroscience

Figure 4

From: Automatic onlinespike sorting with singular value decomposition and fuzzy C-mean clustering

Figure 4

Visualization of raw signal and collection of spike waveforms. A - information covering each trial of movement execution to monitor the uniformity of trials, where black vertical hatches represent spike occurrence detected using external hardware threshold discriminator; blue line is the infrared signal from the analogue IR-pair; thick coloured horizontal lines are retrieved from the set of digital sensors representing different kinematic parts of executed movement. B - the visualization of one trial in 3 sec multi-unit recordings, where spikes determined by software discriminator are marked with red dots. C - an expanding view of the same raw signal, in which the presence of different kinds of spikes is evident; D - extracted 1.8 ms of spikes waveforms, aligned to the peak of action potential by spline interpolation method; E - the same waveforms with 6 truncated samples at the ends, yielded 1.2 ms waveforms to be filled by the data matrix.

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