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An integrated interface for peripheral neural system recording and stimulation: system design, electrical tests and in-vivo results

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Abstract

The prototype of an electronic bi-directional interface between the Peripheral Nervous System (PNS) and a neuro-controlled hand prosthesis is presented. The system is composed of 2 integrated circuits: a standard CMOS device for neural recording and a HVCMOS device for neural stimulation. The integrated circuits have been realized in 2 different 0.35μ m CMOS processes available from ams. The complete system incorporates 8 channels each including the analog front-end, the A/D conversion, based on a sigma delta architecture and a programmable stimulation module implemented as a 5-bit current DAC; two voltage boosters supply the output stimulation stage with a programmable voltage scalable up to 17V. Successful in-vivo experiments with rats having a TIME electrode implanted in the sciatic nerve were carried out, showing the capability of recording neural signals in the tens of microvolts, with a global noise of 7μ V r m s , and to selectively elicit the tibial and plantar muscles using different active sites of the electrode.

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Acknowledgments

This work was partially funded by MIUR (Italian Ministry of Education, University and Research) through project HANDBOT (PRIN 2010/2011), by Italian Ministry of Health through project NEMESIS and by the European Commission, ICT-2013.9.6 FET Proactive: Evolving Living Technologies (EVLIT), through project NEBIAS (n.611687). L. Bisoni gratefully acknowledges Sardinia Regional Government for the financial support of his Ph.D. scholarship (P.O.R. Sardegna F.S.E. Operational Programme of the Autonomous Region of Sardinia, European Social Fund 2007-2013 - Axis IV Human Resources, Objective l.3, Line of Activity l.3.1.). C. Carboni and N. Carta gratefully acknowledge Sardinia Regional Government for the financial support to their research grant.

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Authors and Affiliations

  1. Università di Cagliari, Cagliari, Italy

    Caterina Carboni, Lorenzo Bisoni, Nicola Carta, Roberto Puddu, Luigi Raffo & Massimo Barbaro

  2. École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland

    Stanisa Raspopovic

  3. Universitat Autònoma de Barcelona, Barcelona, Spain

    Xavier Navarro

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  1. Caterina Carboni
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  2. Lorenzo Bisoni
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  7. Luigi Raffo
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Correspondence to Caterina Carboni.

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Carboni, C., Bisoni, L., Carta, N. et al. An integrated interface for peripheral neural system recording and stimulation: system design, electrical tests and in-vivo results. Biomed Microdevices 18, 35 (2016). https://doi.org/10.1007/s10544-016-0043-5

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