Fig. 4 Demonstration of optogenetic and microfluidic capabilities of the wireless, battery-free optofluidic nerve cuff system. Demonstration of optogenetic.

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Fig. 4 Demonstration of optogenetic and microfluidic capabilities of the wireless, battery-free optofluidic nerve cuff system. Demonstration of optogenetic and microfluidic capabilities of the wireless, battery-free optofluidic nerve cuff system. (A) Schematic of the real-time place preference assay designed to test the capabilities of nerve cuff optical stimulation. Representative heat maps (B) and quantification (C) of blue light stimulation of sciatic nerve in wild-type and TRPV1-ChR2 mice. Mice were placed in the chamber for a total of 20 min. TRPV1-ChR2 mice displayed significant aversion to 1-Hz light pulse stimulus compared to wild-type mice (n = 9 to 10; *P < 0.05, two-way ANOVA with Sidak’s multiple comparisons test). (D) Optofluidic cuff devices loaded with bupivacaine and saline were implanted in mice, and thermal sensitivity was assayed before and after saline and again after bupivacaine infusion. (E) Quantification of the withdrawal latency to thermal stimulation of the ipsilateral (device side) and contralateral paw at baseline, after saline and after bupivacaine (n = 5 to 6; *P < 0.05 and **P < 0.01, one-way ANOVA with Sidak’s multiple comparisons test). Yi Zhang et al. Sci Adv 2019;5:eaaw5296 Copyright © 2019 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).