Fig. 3. NdWFamide enhances the nerve-evoked contractions of the vasoconstrictor muscle. (A) and (B) are from the different preparations. The contraction of the muscle was evoked by the nerve stimuli as described in Fig. 2. Duration of each stimulus train in A and B were 1 s and 0.4 s, respectively. Note a tonic contraction was also induced by NdWFamide at higher concentrations.