Abstract:
:Imaging compound action potentials (CAPs) in peripheral nerves could help avoid side effects in neuromodulation by selective stimulation of identified fascicles. Existing methods have low resolution, limited imaging depth, or are invasive. Fast neural electrical impedance tomography (EIT) allows fascicular CAP imaging with a resolution of <200 µm, <1 ms using a non-penetrating flexible nerve cuff electrode array. Here, we validate EIT imaging in rat sciatic nerve by comparison to micro-computed tomography (microCT) and histology with fluorescent dextran tracers. With EIT, there are reproducible localized changes in tissue impedance in response to stimulation of individual fascicles (tibial, peroneal and sural). The reconstructed EIT images correspond to microCT scans and histology, with significant separation between the fascicles (p < 0.01). The mean fascicle position is identified with an accuracy of 6% of nerve diameter. This suggests fast neural EIT can reliably image the functional fascicular anatomy of the nerves and so aid selective neuromodulation.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Ravagli E,Mastitskaya S,Thompson N,Iacoviello F,Shearing PR,Perkins J,Gourine AV,Aristovich K,Holder Ddoi
10.1038/s41467-020-20127-xsubject
Has Abstractpub_date
2020-12-07 00:00:00pages
6241issue
1issn
2041-1723pii
10.1038/s41467-020-20127-xjournal_volume
11pub_type
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