FIGURE 3.

Effects of arginine vasopressin (AVP) and oxytocin (OT) on spontaneous contractions of human (a) proximal and (b) distal stomach circular muscle. (c) AVP‐ and (d) OT‐induced increase in muscle tone (i, ii) and amplitude (iii, iv) and frequency (v, vi) of spontaneous contractions of human proximal (graphs on left) and distal (right) stomach, after 30 min incubation with SR49059 and L371257, respectively, or vehicle (dimethyl sulfoxide [DMSO] 0.1% v/v). n = 5. (e) and (f) compare a spontaneous contraction of human (a) proximal and (b) distal stomach before (baseline) and after a single concentration of AVP (10⁻⁷ M), together with the AVP‐induced increase in muscle tone. n = 4. Data are mean ± SEM