Table 1.

Burst characteristics of the rear premotor HN(15) and HN(16) interneurons

	HN(15)	HN(16)
No. of neurons	23	15
Mean spike phase
Synchronous	0.63 ± 0.09	0.62 ± 0.08
Peristaltic	0.76 ± 0.06†	0.77 ± 0.11†
Duty cycle
Synchronous	0.42 ± 0.08	0.46 ± 0.12
Peristaltic	0.46 ± 0.12	0.48 ± 0.12
Mean spike frequency, Hz
Synchronous	4.9 ± 1.8	4.4 ± 1.6
Peristaltic	5.1 ± 1.7*	4.1 ± 1.2
Average no. of spikes per burst
Synchronous	14.2 ± 5.1	12.5 ± 5.6
Peristaltic	15.0 ± 5.9	12.7 ± 5.3

^*P ≤ 0.05, HN(15) vs. HN(16) interneuron (unpaired t-test).

^†P ≤ 0.005, synchronous vs. peristaltic mode in the same neuron (paired t-test).