Brief Article
Copyright ©2011 Baishideng Publishing Group Co.
World J Gastroenterol. Jan 28, 2011; 17(4): 514-521
Published online Jan 28, 2011. doi: 10.3748/wjg.v17.i4.514
Table 1 Stimulation intensities to evoke the predefined sensory levels on the visual analogue scale while stimulating with distension, heat and electricity 4 and 14 cm above the esophago-gastric junction, median (range)
VAS levelPatients
Controls
13571357
Heat (s)
4 cm112 (7-18)14 (11-20)15 (12-34)NA11 (5-18)13 (6-20)14 (6-23)NA
14 cm112 (5-14)15 (6-24)17 (6-32)NA9 (4-17)11 (7-18)13 (8-20)NA
Mechanical (mL)
4 cm111 (1-38)25 (12-50)36 (18-50)50 (20-50)8 (2-24)21 (6-50)28 (10-50)33 (13-50)
14 cm5 (3-17)14 (9-26)18 (10-34)25 (11-46)5 (1-27)14 (4-40)18 (8-44)19 (10-46)
Electrical (mA)
4 cm7 (4-17)9 (5-21)12 (6-25)13 (6-26)7 (4-15)8 (5-20)10 (8-21)12 (9-24)
14 cm4 (2-6)5 (3-10)7 (5-13)9 (6-16)4 (2-9)6 (4-12)8 (4-13)11 (5-15)
Table 2 Traditional peaks in evoked brain potentials as response to esophageal electrical stimulations in patients and controls, mean ± SD
PatientsControls
N1 latency (ms)76 (20)69 (14)
P1 latency (ms)105 (19)106 (15)
N2 latency (ms)177 (15)172 (25)
P2 latency (ms)255 (35)266 (39)
N1P1 amplitude (mV)2.5 (2.5)3.0 (1.7)
P1N2 amplitude (mV)6.8 (5.1)9.3 (5.5)
N2P2 amplitude (mV)7.6 (5.9)12.6 (7.6)