Detrended Fluctuation Analysis.

A. Classical DFA computed for spontaneous spinal activity (SSA). In 10 experiments spontaneous CDPs (Cord Dorsum Potentials) recorded from a single spinal segment under initial conditions showed a Hurst exponent value of DFA- = 1.040.09 (mean sd). The recordings of single segments were among L3 through S1 depending on the experiments protocol. The R line averaged was 0.98. See text for details. B. The Hurst exponent values ('s) were obtained from mDFA for multiple spinal segments for four lumbar segments in 10 experiments under initial conditions ( = 1.010.06) with a R line = 0.98. Following randomization, the same set of data showed mDFA- = 0.490.01, with an average R for line-fitting higher than 0.99.