Table 1.

Properties of the M-wave and H-reflex: latency, amplitude, and threshold

	MT (mA)	Mmax (mV)	Hmax (mV)	M latency (msec)	H latency (msec)	H-reflex threshold (× MT)	Hmax (× MT)
Intact (n = 12)	0.013 ± 0.002	6.68 ± 1.05	2.26 ± 0.53	2.46 ± 0.11	9.35 ± 0.51	1.13 ± 0.06	1.84 ± 0.20
SCI 1 wk (n = 20)	0.027 ± 0.004	7.62 ± 1.11	3.52 ± 0.67	2.60 ± 0.09	9.59 ± 0.30	1.04 ± 0.03	1.42 ± 0.07
SCI 2 wk (n = 10)	0.025 ± 0.005	5.83 ± 0.97	2.97 ± 0.53	2.83 ± 0.10	9.67 ± 0.27	1.08 ± 0.07	1.33 ± 0.06
SCI 2 wk + Ex (n = 6)	0.017 ± 0.005	6.89 ± 1.15	3.44 ± 0.93	2.83 ± 0.12	9.49 ± 0.32	1.10 ± 0.04	1.56 ± 0.21
SCI 4 wk (n = 18)	0.026 ± 0.010	6.93 ± 0.92	4.41 ± 0.75	2.45 ± 0.07	8.70 ± 0.18	1.05 ± 0.03	1.31 ± 0.10
SCI 4 wk + Ex (n = 18)	0.023 ± 0.003	7.94 ± 0.95	3.46 ± 0.67	2.40 ± 0.06	8.83 ± 0.22	1.03 ± 0.03	1.38 ± 0.07
SCI 8 wk (n = 6)	0.024 ± 0.013	7.00 ± 1.20	3.64 ± 0.62	2.54 ± 0.11	8.49 ± 0.33	0.85 ± 0.10	1.26 ± 0.12
SCI Pre-Bu (n = 6)	0.030 ± 0.013	6.83 ± 1.27	3.52 ± 0.55	2.47 ± 0.10	8.45 ± 0.32	0.86 ± 0.08	1.26 ± 0.09
SCI Post-Bu (n = 6)	0.083 ± 0.030	5.14 ± 0.92	2.81 ± 0.22	2.51 ± 0.09	8.88 ± 0.26	0.91 ± 0.06	1.12 ± 0.12
SCI + Ex Pre-DIOA (n = 9)	0.016 ± 0.001	8.97 ± 1.25	4.17 ± 1.14	2.96 ± 0.13	10.49 ± 0.38	0.96 ± 0.06	1.32 ± 0.15
SCI + Ex Post-DIOA (n = 9)	0.020 ± 0.004	7.24 ± 1.58	4.42 ± 1.06	2.74 ± 0.17	10.87 ± 0.43	0.97 ± 0.04	1.31 ± 0.13

Values are mean ± SEM. MT, motor threshold; Bu, bumetanide; Ex, exercise.