Table 1.

Summary of the rhythm-generating potential along the cord

Rostral	Caudal	Average no. segments	Preparations with rhythmic activity	Relative modulation amplitude	Period length	Period coefficient of variation
Th11–Th12	Th13	2.7 (n = 3)	100%	0.96 (0.54–1.30)	1.01 (0.94–1.08)	3.99 (1.32–6.12)
Th12	L1–L2	3.3 (n = 7)	100%	0.84 (0.63–1.22)	1.16 (0.75–1.86)	2.13 (0.50–3.51)
Th13	L1–L2	2.3 (n = 3)	100%	0.59 (0.42–0.70)	1.30 (0.75–1.92)	4.29 (1.07–8.89)
L1	L3–L6	5.0 (n = 3)	100%	0.75 (0.62–1.00)	1.17 (1.03–1.38)	3.88 (2.61–6.22)
L2	L4–L6	4.5 (n = 3)	67%	0.76 (0.72–0.78)	1.38 (1.17–1.59)	2.53 (2.25–2.82)
L3	L6–S1	4.4 (n = 5)	80%	0.66 (0.57–0.70)	2.95 (1.52–5.53)	5.33 (2.16–9.76)
L4	L5–L6	2.8 (n = 6)	33%	0.61 (0.38–0.83)	2.71 (1.46–3.97)	4.27 (3.92–4.63)

The first two vertical columns identify the rostral and caudal borders of surgically divided short preparations. The average number of segments and number (n) of preparations used are given in the third vertical column; the fourth column shows the percentage of rhythmically active preparations within each group. The relative modulation amplitude, period length, and the period coefficient of variation were divided by the corresponding measurements before the lesion. The mean, followed by the range (in parentheses), is presented for this ratio.