Table 4.

Percentage of total failures is greater in vagotomy high-failure synapses

Stimulus Shock	Percent Total Failures of Control High Failure Synapses	Percent Total Failures of Vagotomized High Failure Synapses	P
1	2 ± 2.0	3 ± 2.0	0.7
2	10 ± 2.0	17 ± 4.0	0.1
3	22 ± 4.0	38 ± 6.0	0.03
4	29 ± 3.8	42 ± 5.6	0.07
5	29 ± 3.6	48 ± 4.6	0.003

Following vagotomy, high-failure synapses have a greater percentage of total failures when compared with control high-failure synapses. Though the difference is only significant after the third and fifth shocks (during a 50-Hz stimulus train), vagotomized high-failure synapses clearly have more overall failures than control high-failure synapses (see Fig. 6C). Percent failures were derived after each stimulus by counting the total number of failures and dividing that number by 10 (for the 10 trials each cell underwent) multiplied by the total number of control high-failure (n = 20) or vagotomized high-failure (n = 24) synapses. Values are presented as means ± SE.