Figure 4 .

Representative raw traces of three intercostal spaces (IM 2, 4, and 9) of a control rat, acutely injured rat, and at 1 week and 16 weeks following C2 spinal cord hemisection injury. Note the prominent reduction in EMG activity immediately after injury. At 1 week following SCI, activity was increased in rostral thoracic intercostal spaces and we observed activity appearing over the middle thoracic spaces. By 16 weeks following SCI, EMG activity was observed in all 10 intercostal spaces, but the EMG activity was still reduced compared to control values in the caudal half of the thoracic region (IM7 – IM10). Each trace is 6 seconds in total length.