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. Author manuscript; available in PMC: 2015 Jan 30.
Published in final edited form as: J Neurosci Methods. 2013 Nov 4;222:118–130. doi: 10.1016/j.jneumeth.2013.10.017

Figure 3.

Figure 3

Sample stride interval time series and the corresponding PSDs: (a) Study I (healthy) time series; (b) PDS of Study I (healthy) sample time series; (c) Study II (ALS) time series; and (d) PSD of Study II (ALS) time series.