Comparison of EMG activity of the forelimb and hindlimb muscles.

<p>EMG activity during locomotion of a representative rat before (A), 7 days (B), 14 days (C) and 42 days (D) after spinal cord hemisection. Interlimb coordination (onset of EMG activity in the left TA (l TA) with respect to the contralateral right TA (r TA)) and intralimb coordination (onset of EMG activity in the left extensor (l Sol) with respect to the left TA (l TA)) for these time points are shown in the left and right polar plots, respectively. Zero corresponds to the onset of activity in the right TA muscle, and the positions of the filled black circles indicate the times of onset of activity in the left TA<i>—</i>interlimb coordination (left panel) or the onset of activity in the left Sol <i>-</i>intralimb coordination (right panel) in the relation to the onset of activity in the left TA muscle. The black lines each represent data from one animal, and the red line represents the global mean for the group. l Tri—left <i>Triceps</i>; l/r Sol—left and right <i>Soleus</i> and l/r TA—left and right <i>Tibialis Anterior</i>.