Table 1.

Average durations for the “short” and “long” action potentials

	D1	D2	D3	D4
“Short” APs	0.27 ± 0.015	0.464 ± 0.029	0.676 ± 0.044	1.71 ± 0.15
“Long” APs	0.23 ± 0.02	0.43 ± 0.037	0.978 ± 0.056***	2.15 ± 0.21

Values are means ± SE, in seconds. A comparison between 33 “short” and 13 “long” action potentials (APs) by Mann–Whitney Rank Sum test. ***P < 0.001