Box and whiskers plots for cardiac sympathetic tonus [beats/min (bpm)] in spinal intact (Sham SCI), paraplegic (T2–3X), and tetraplegic (C6–7X) rats. Cardiac sympathetic tonus was significantly lower in tetraplegic rats compared with spinal intact and paraplegic rats. In contrast, cardiac sympathetic tonus in paraplegic rats was significantly elevated above spinal intact rats. *P < 0.05, Sham SCI vs. T2–3X, group effect; #P < 0.05, T2–3X vs. C6–7X, group effect; +P < 0.05, Sham SCI vs. C6–7X, group effect.