Table 3.

Distribution of 5 quantitative measures of discharge behavior for the population of 10 motoneurons driven by excitation alone and excitation in combination with 6 different spatiotemporal patterns of inhibition

		Constant Inhibition		Push-Pull Inhibition		Proportional Inhibition		Significance
	Excitation Alone	Uniform	Proximal	Uniform	Proximal	Uniform	Proximal	Temporal	Spatial	Interaction
gexr, %	17.98 ± 9.69	25.63 ± 10.53	23.3 ± 9.38	41.83 ± 8.8	34.8 ± 7.28	43.97 ± 22.11	29.86 ± 11.69	P < 0.001	P < 0.05	NS
Nspi	4.5 ± 2.37	6.5 ± 3.87	3.1 ± 2.02	9.7 ± 3.74	1.2 ± 0.42	11.2 ± 7.77	1.9 ± 1.29	NS	P < 0.001	P < 0.001
df/dt, imp·s−1·s−1	0.74 ± 0.17	0.79 ± 0.18	0.76 ± 0.2	1.62 ± 0.23	1.8 ± 0.41	0.48 ± 0.39	−0.28 ± 0.13	P < 0.001	P < 0.05	P < 0.001
dfi, imp/s	8.6 ± 4.21	8.52 ± 4.4	6.19 ± 3.77	8.72 ± 3.17	2.16 ± 1.72	5.66 ± 3.81	2.75 ± 4.19	P < 0.01	P < 0.01	NS
dgex, %	18.3 ± 2.86	11.69 ± 4.31	19.2 ± 3.0	3.21 ± 3.0	11.97 ± 7.75	5.39 ± 9.94	16.73 ± 18.4	P < 0.001	P < 0.001	NS

Gexr, percentage of maximum excitatory drive at recruitment; Nsp_i, the number of spikes in the initial rapid phase of firing rate increase; df/dt, slope of second phase of firing rate increase; df_i, difference in firing rate between the beginning and end of the initial phase of firing rate increase; dgex, percent difference in excitatory drive at recruitment and de-recruitment. Significance values are the results of a 2-way ANOVA of the significance of temporal and spatial patterns of inhibition on each outcome measure along with the interaction of spatial and temporal factors. NS, no significant difference.