CNS RECORDING ELECTRODES AND TECHNIQUES

Recording electrodes provide the direct brain interface for an emerging class of neuroprosthetic systems. This chapter focuses on implantable microelectrode arrays for recording neuronal action potentials and local field potentials. The fundamental operating principles of these types of microelectrodes are discussed within the broader context of neural implant systems. Microelectrode performance is discussed in relation to electrode impedance, electrode size and shape, and electrode materials. Overall considerations of neural implant systems for long-term recording in humans are presented. The chapter concludes by presenting a brief survey of different types of microelectrodes.