Abstract i List of Contents ii List of tables iii List of figures iv 1 INTRODUCTION 1 2 FABRICATION AND METHODS 3 2.1 Fabrication 3 2.2 Surgical procedures 5 2.3 In vivo recordings 7 3 RESULTS AND DISCUSSIONS 9 3.1 Electrochemical impedance spectroscopy (EIS) 9 3.2 Temporal analysis of fVEPs 11 3.3 Time-frequency dynamics of fVEPs 17 4 CONCLUSION 19 REFERENCES 21