TABLE 1.

Motor-unit discharge rates, discharge rate variability, and CIS

	MU Pairs	GM Discharge Rate, pps	GM CV Discharge Rate, %	CIS	Peak Width, ms
Across muscle
FDI-FPI	74	9.81 ± 0.17	31.56 ± 0.63	0.17 ± 0.02	16.98 ± 1.19
FPL-FDI	67	10.24 ± 0.18	28.29 ± 0.66	0.25 ± 0.02	15.46 ± 1.08
FPL-FPI	57	10.82 ± 0.19	28.35 ± 0.72	0.29 ± 0.03	18.64 ± 1.08
Within muscle
FDI-FDI	11	9.30 ± 0.43	30.47 ± 1.64	0.70 ± 0.06	16.00 ± 2.29
FPI-FPI	10	9.92 ± 0.45	31.54 ± 1.72	0.66 ± 0.06	20.74 ± 2.54

The number of motor-unit (MU) pairs used for the analysis is given together with the geometric mean (GM) of motor-unit firing rate and the coefficient of variation (CV) of motor-unit firing rate, the common input strength index (CIS), and the duration of the cross-correlogram peak. All values are means ± SE. FDI, m. first dorsal interosseus; FPI, m. first palmar interosseus; FPL, m. flexor pollicis longus.