Figure 1.

(a) Low power micrograph of an HL8 electrode array illustrating the 8 Pt electrodes (E1–E8) on a PDMS silicone carrier. All Pt contact areas on each array were identical. The white band (M) was used as a surgical guide to ensure a uniform insertion depth for each electrode array. Scale bar = 1 mm. (b) – (e) Scanning electron micrographs illustrating four of the six Pt contact areas used in this study; (b) 0.2 mm²; (c) 0.085 mm²; (d) 0.075 mm²; and (e) 0.0375 mm². Scale bar = 100 μm.