Abstract: Probe (1) for deep electrical neurostimulation, and more specifically for deep brain electrostimulation, comprising: a tubular body (10) of biocompatible material with a lateral wall (11) defining a lumen (12) and a closed anterior end (13), said tubular body (11) can be introduced for at least a part of its length inside a patient's body for reaching a region to be stimulated; wherein it also comprises: a plurality of electrically insulating arms (32) each bearing at least one electrode (40) and being able to pass from a first position in which they are housed inside of said tubular body (11) to a second position in which they project radially from this latter and inversely; and means (20 and 50) for making said arms (32) pass from said first position to said second position and inversely.

Abstract: A device for measuring electrical activity of biological elements, including a substrate that has lower and upper faces and at least one through opening, the opening being delimited by a set of walls. Two plates are placed on either side of the lower and upper faces of the substrate and delimit, with the set of walls, a chamber. Each of the plates is provided, on its face lying opposite the substrate, with at least one electrode facing the opening in the substrate. Each of the plates further has at least one channel that starts inside the chamber and connects the chamber to the outside of the device, and the chamber communicates with the outside of the device only through the channels.