Figure 6. Concentration-dependency of the inhibition of the nicotinic acetylcholine receptor after preexposure of the respective patch to different concentrations of isoflurane (34 patches) or sevoflurane (25 patches) for about 1 min, followed by activation with 10 sup -4 M acetylcholine. Each point represents the mean +/- SD of the relative peak amplitude (relative peak amplitude activated by 10 sup -4 M acetylcholine = 1).