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Mean net EMG responses to a fast stretch in the nine upper limb muscles in the three arm postures tested. Each box represents the mean value of EMGnet for the corresponding muscle and arm posture. Error bars represent 1 SD. Astericks indicate a significant difference between posture 1 and both posture 2 (*P < 0.05, after Bonferroni adjustment) and posture 3 (**P < 0.01, after Bonferroni adjustment), as revealed by pairwise multiple comparisons with a Bonferroni adjustment.
