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IRM view of a spatula-shaped seta tip at successive positions z of the stage (indicated in micrometres in the lower left of each image). In the upper row, the pad approaches the substrate, while in the lower row, the pad separates from the substrate. The difference in z-values between loading and unloading shows that there was considerable hysteresis. It can be seen that the seta slid distally along the substrate during loading and proximally during unloading.
