Penetrating multichannel stimulation and recording electrodes in auditory prosthesis research.

摘要: Microelectrode arrays offer the auditory systems physiologists many opportunities through a number of electrode technologies. In particular, silicon substrate large design space including choice layout plan, range surface areas for active sites, site materials and high spatial resolution. Further, most designs can double as recording stimulation electrodes in same preparation. Scala tympani prosthesis research has been aided by mapping cortex inferior colliculus to assess CNS responses peripheral stimulation. More recently placed nerve, cochlear nucleus have advanced exploration alternative sites prostheses. Multiplication results from experimental effort simultaneously stimulating several locations, or acquiring streams data synchronized event, is commonly sought after advantage. Examples inherently multichannel functions which are not possible with single include (1) current steering resulting more focused stimulation, (2) improved signal-to-noise ratio (SNR) when noise and/or neural signals appear on than one (3) source density (CSD) measurements. Still powerful methods that exploit closely-spaced improve detailed interrogation surrounding domain. Here, we discuss thin-film recording/stimulation substrates. These shown be valuable because their precision coupled reproducibility an ever expanding space. The shape customized accommodate use cortical, deep structures while flexible cables, fluid delivery novel coatings added broaden application. iridium oxide interface material increased efficiency charge transfer lowered impedance electrodes.