A novel microwire interface for small diameter peripheral nerves in a chronic, awake murine model.

Journal of Neural Engineering
Jessica D. FalconeHarbaljit S. Sohal

Abstract

The vagus nerve has been implicated in a variety of immune responses, and the number of studies using mouse models to unravel key mechanisms has increased. However, as of yet, there is no electrode that can chronically record neural activity from the mouse vagus nerve due to its small diameter. Such recordings are critical to understand the role of these biomarkers for translational research. In this study, we developed a methodology for surgically implanting the wrappable microwires onto the vagus nerve of mice. Similar to a cuff electrode, we wrapped de-insulated ends of microwires around the vagus nerve and re-insulated them on the nerve with Kwik-Sil. The recording fidelity of the wrappable microwire on the vagus nerve was validated in an acute, anesthetized model by comparing performance to commercially-available electrodes. A chronic, awake mouse model was then developed to record spontaneous compound action potentials (CAPs). In an acute setting, the wrappable microwire successfully recorded spontaneous CAPs with similar signal-to-noise ratios (SNR) and peak-to-peak amplitude to commercially available electrodes. In chronic, awake recordings, viable SNRs were obtained from the wrappable microwires between 30 and 60 d (n ...Continue Reading

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Oct 23, 2020·Journal of Neural Engineering·Anh Tuan NguyenZhi Yang
Mar 23, 2021·Journal of Neural Engineering·Valentina PaggiStéphanie P Lacour

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