The present application relates to a neural probe system (6) comprising: \n ¢ a carrier (7), \n ¢ at least one planar microelectrode (2) attached to the carrier (7), said planar microelectrode (2) comprising a set of two or more conductive segments (1), said set being confined in an area of from 15 ¼m 2 to 8000 ¼m 2 , and \n ¢ electrical connections (4,5) assuring that at least two subsets of conductive segments (1) within said set are individually switchable to a same input and/or output line (3) so that the surface area and/or the shape of the microelectrode (2) electrically connected to said line (3) can be varied.
Neural probe with a modular microelectrode for stimulating neurons or recording neural activity