Figure 2.

A) A typical configuration of flexible PCB arrays employed in this study; arrays of 32 silver and gold electrodes were staggered vertically (256 electrodes total; area ~36 cm²). B) In-vivo recordings were taken from the anterior porcine gastric corpus in the position shown. C) Activation map showing the slow wave propagation pattern across this gastric region. The colored (isochronal) bands represent the area of slow wave propagation per 1 s of time. The waves propagated distally and the lesser curvature half of the array is over quiescent tissue (Egbuji et al, 2010). D) Sample electrograms showing slow waves recorded from the silver and gold-contact flexible PCBs prior to removal of baseline drift.