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. Author manuscript; available in PMC: 2008 Aug 1.
Published in final edited form as: Clin Neurophysiol. 2007 Jun 19;118(8):1802–1814. doi: 10.1016/j.clinph.2007.05.060

Figure 7.

Figure 7

Results of the cross-correlation analysis between neck flexor and extensor EMGs. Panel A shows averaged across subjects z-scores with standard error bars of the peak correlation coefficient (R-peak). Panel B shows the average time lag (Δt) at R-peak under the head, trunk, and head and trunk perturbations (HP, TP, and HTP, respectively). Positive values in panel B indicate an earlier EMG burst in the neck extensor as compared to the neck flexor. * means p<0.05. Lines connecting the mean bars indicate the differences found.