The organic electronic micropump (represented by a purple cylinder) directly releases among the neurons, active molecules (spheres) that will control the activity of these neurons (here they will stop the epileptic activity).  © Adam Williamson, Christophe Bernard, ID Labs, Arab4D (Christophe Bernard: Controlling Epileptiform Activity with Organic Electronic Ion Pumps. DOI: 10.1002/adma.201500482. 2015. Copyright Wiley-VCH Verlag GmbH &amp; Co. KGaA. Reproduced with permission).