fig4

Figure 4. The evolution of LM-based neuro-electrodes. (A) Fabrication of 3-D medical electronic devices directly in living organisms by continuous injection of biocompatible packaging materials and LM inks^[90]; (B) The LM nerve electrodes and the machining process^[73]; (C) LM nano-ink based bioelectrode^[92]; (D) LM neuro-electrodes that can be used to record EEG signals and ECG signals^[77]; (E) LM cuff electrodes that can be adapted to the movement process^[7]; (F) LM-based nerve electrode arrays that fit very well into the skull^[9]. LM: Liquid metal.