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. Author manuscript; available in PMC: 2016 Feb 1.
Published in final edited form as: Respir Physiol Neurobiol. 2014 Dec 12;207:28–39. doi: 10.1016/j.resp.2014.11.016

Figure 1.

Figure 1

Two examples illustrating data preparation for the clustering procedure. Panel A: spike activity (CED Spike2 wavemark signals) and corresponding rate meter recordings of an I (upper) and E (lower) PRG neuron. Panel B: Corresponding CTHs and time-averaged phrenic neurogram (PNG-bar; 31 cycles). Dots: 5 temporally equidistant values during I-phase and 5 during the E-phase are selected for each vector representation of neuronal pattern. Time zones are indicated by the vertical dashed and dotted lines. See text for more details.