An electrode assembly (20) includes electrodes (22) and a cuff (24), shaped so as to define a tubular housing (28) that defines a longitudinal axis (40) therealong, two edges (30A, 308), and a slit (42) between the two edges (30A, 308). When the housing (28) is closed, respective contact surfaces (32A, 328) of the two edges (30A, 308) touch each other, and the housing (28) defines an inner surface (34) that faces and surrounds the axis (40), to which inner surface (34) the electrodes (22) are fixed. The cuff (24) further defines three or more annular insulating elements (50) that extend toward the axis (40).
