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. Author manuscript; available in PMC: 2010 Nov 16.
Published in final edited form as: Gastroenterology. 2008 Dec 10;136(4):1328–1338. doi: 10.1053/j.gastro.2008.12.010

Table 1.

Control Ondansetron (5 μmol/L) n P value
CMMCs evoked by local reflexes
 Mucosal brush strokes, area under the curve mN-s 343.85 ± 35.61 65.85 ± 20.26 4 <.01
 Circumferential stretch, area under the curve mN-s 374.85 ± 46.2 343.72 ± 20.26 4 >.05
Alosetron, 5 μmol/L
 Mucosal brush strokes, area under the curve mN-s 288.7 ± 33.6 45.7 ± 20.3 4 <.01
 Circumferential stretch, area under the curve mN-s 333.4 ± 46.2 326.7 ± 33.6 4 >.05
Ondansetron, 1–3 μmol/L
CMMCs evoked by a fixed pellet
 Resting membrane potential, mV 62.47 ± 2.61 60.98 ± 3.63 5 >.05
 Interval between CMMCs, s 225.22 ± 39.54 Blocked 4 <.01
 Duration of CMMCs, s 50.39 ± 2.46 Blocked 4 <.01
 Amplitude of hyperpolarization, mV 12.18 ± 0.50 Blocked 4 <.01
 Amplitude of depolarization, mV 15.35 ± 1.41 Blocked 4 <.01
 Number of action potentials on depolarization 2.60 ± 0.27 Blocked 4 <.01
Ondansetron, 1–3 μmol/L
Spontaneous junction potentials
 Interval between IJPs, s 2.10 ± 0.15 12.05 ± 0.65 5 <.05
 Amplitude of IJPs, mV 10.05 ± 0.57 4.79 ± 0.57 5 <.05
 Duration of IJPs, mV 0.65 ± 0.03 0.58 ± 0.05 5 <.05
 Duration of EJPs, s 0.60 ± 0.05 1.23 ± 0.11 5 <.05
 Amplitude of EJPs, mV 8.49 ± 0.59 9.34 ± 0.25 5 >.05
Atropine, 1 μmol/L
Ondansetron, 1 μmol/L
CMMCs evoked by TNS (no mucosa)
 Amplitude of depolarization, mV 16.42 ± 1.55 17.19 ± 1.55 5 >.01
 Duration of depolarization, s 44.81 ± 5.66 49.7 ± 4.34 5 >.01
 Amplitude of hyperpolarization, mV 13.44 ± 2.05 3.74 ± 0.36 5 <.01
 Duration of hyperpolarization, s 44.81 ± 5.66 21.85 ± 2.48 5 <.01