The PDF file includes:

• Note S1. Recoverability of the twining electrode and the maximum strain in the Au layer.
• Note S2. Comparison of bending stiffness.
• Note S3. Comparison of tension stiffness.
• Note S4. Calculation of the SNR.
• Fig. S1. Design of the SMP network and the mechanistic illustration of reconfiguration (plastic) and recovery (elastic).
• Fig. S2. Chemical network of the precursor monomers and the synthesized SMPs.
• Fig. S3. Characterization of the thickness of the Au/Ti and PI layers.
• Fig. S4. Characterization of the SMP.
• Fig. S5. Cyclic voltammogram.
• Fig. S6. Impedance spectroscopy.
• Fig. S7. Mechanical model for the twining electrode and the corresponding results.
• Fig. S8. FEA models and results for EA.
• Fig. S9. The parameters used in the FEA and the corresponding FEA model.
• Fig. S10. The FEA comparison results of the normal and shear stress applied on the nerve under three deformation modes.
• Fig. S11. Calculations of the recorded SNR.
• Table S1. Comparison of (EI)_Twining and (EI)_Tradition.

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Other Supplementary Material for this manuscript includes the following:

• Movie S1 (.mp4 format). Twining plants under complex deformations.
• Movie S2 (.mp4 format). The twining electrode is twined on a glass rod driven by 37°C water.
• Movie S3 (.mp4 format). The electrical conductivity test.
• Movie S4 (.mp4 format). The demonstration of the recovery of the twining electrode upon physiology temperature.
• Movie S5 (.mp4 format). The illustration of the mechanical reliability of the twining electrode under stretching and bending.
• Movie S6 (.mp4 format). The in vivo self-climbing on vagus nerve process of the twining electrode.
• Movie S7 (.mp4 format). The self-adaptive adjustment of the twining electrode.
• Movie S8 (.mp4 format). The twining electrode conformally contacts with the deforming vagus nerve.
• Movie S9 (.mp4 format). The activated moments of the leg of the anesthetized rabbit.