Table 2. eat-4 mutants recorded with NeuroChip or conventional microelectrode recordings have the same phenotype.

	Conventional recording	NeuroChip
Eat-4(n2474) (n = 5)
EPG frequency (s−1)	0.055±0.007	0.090±0.015
EPG duration (s)	0.287±0.014****1	0.172±0.009****3
Average number of P waves	0.280±0.065*2	0.103±0.022****4
‘e’ amplitude (mV)	0.368±0.030	0.376±0.034
R-E interval (s)	26.513±3.078	22.288±3.867
R-E ratio	2.170±0.117	1.491±0.085

Data are the mean ± s.e.mean of recordings from ‘n’ worms. Each parameter was derived from AutoEPG analysis of all the EPGs captured in a recording of 5 minutes or, for manual analysis, from 60 EPGs. Eat-4 had increased pump duration and decreased number of ‘P’ waves compared to wild-type. Comparisons made by unpaired Student’s t-test to the respective parameters for ^1,2 conventional wild-type N2 recording without 5-HT, P<0.0001 and P = 0.0208, respectively; or ^3,4 to wild-type N2 NeuroChip recording without 5-HT^, P<0.0001. Wild-type data are provided in Table 1.