Implantable electrode arrangement

An implantable electrode arrangement for spatially-selective detection of neuronal electrical signals, which propagate along at least one nerve fiber contained in a nerve fascicle, and for selective electrical stimulation of the at least one nerve fiber, comprising:

• a biocompatible carrier substrate, including at least one carrier substrate region placeable around the nerve fascicle as a cuff, and having a cylindrical carrier substrate oriented to face the nerve fascicle in an implanted state, an axial extension, circumferential extension and a first electrode arrangement attached thereto, the electrode arrangement including, at least three axially spaced first electrode structures with each first electrode structure comprising at least two first electrode surfaces disposed circumferentially;
• at least two axially spaced apart first electrode strips which assume a ring shape, the first electrode strips enclosing the at least three electrode structures on both sides in an axial direction and being connectable or connected to a signal detector and generator;
• at least one second electrode arrangement spaced from the first electrode arrangement and facing the nerve fascicle including at least two spaced apart second electrode strips which have an annular shape and at least one second electrode structure, extending axially between the at least two second electrode strips and each comprising at least two second electrode surfaces which are equally spaced circumferentially;
• and wherein
• the second electrode arrangement is connected at least with the signal detector and generator or to another signal generator.