Fig. 3: Flexible electrodes for EP signals recording of PNS and CNS.

a Completely conformal electrode array for the mapping of ECoGs; b image of the electrode array (25 μm mesh) on a feline brain after the dissolve of the silk substrate. Inset, 76 and 2.5 μm electrode arrays; and c the recorded ECoG with the color showing the SNR. d The structure of the flexible, high-density electrode array with high spatial resolution and large coverage; e the image of the high-density electrode on a cat brain for the mapping of the visual cortex; and f the visual evoked response of the 360-channel electrode array. g Biodegradable electrodes integrating on a rat’s cortical surface; and h the structure (upper middle) and in vivo chronic recordings of the rats with a duration of about 30 days (down middle and right). i 3D twining electrode for peripheral nerve system. a–c Reproduced with permission⁵⁵ (Copyright 2010, Nature Publish Group). d–f Reproduced with permission¹⁰⁵ (Copyright 2011, Nature Publish Group). g, h Reproduced with permission⁸¹ (Copyright 2016, Nature Publish Group).¹¹² (Copyright 2019, American Association for the Advancement of Science).