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      Recent progress on peripheral neural interface technology towards bioelectronic medicine

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          Abstract

          Modulation of the peripheral nervous system (PNS) has a great potential for therapeutic intervention as well as restore bodily functions. Recent interest has focused on autonomic nerves, as they regulate extensive functions implicated in organ physiology, chronic disease state and appear tractable to targeted modulation of discrete nerve units. Therapeutic interventions based on specific bioelectronic neuromodulation depend on reliable neural interface to stimulate and record autonomic nerves. Furthermore, the function of stimulation and recording requires energy which should be delivered to the interface. Due to the physiological and anatomical challenges of autonomic nerves, various forms of this active neural interface need to be developed to achieve next generation of neural interface for bioelectronic medicine. In this article, we present an overview of the state-of-the-art for peripheral neural interface technology in relation to autonomic nerves. Also, we reveal the current status of wireless neural interface for peripheral nerve applications. Recent studies of a novel concept of self-sustainable neural interface without battery and electronic components are presented. Finally, the recent results of non-invasive stimulation such as ultrasound and magnetic stimulation are covered and the perspective of the future research direction is provided.

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          Most cited references46

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          Structural absorption by barbule microstructures of super black bird of paradise feathers

          Many studies have shown how pigments and internal nanostructures generate color in nature. External surface structures can also influence appearance, such as by causing multiple scattering of light (structural absorption) to produce a velvety, super black appearance. Here we show that feathers from five species of birds of paradise (Aves: Paradisaeidae) structurally absorb incident light to produce extremely low-reflectance, super black plumages. Directional reflectance of these feathers (0.05–0.31%) approaches that of man-made ultra-absorbent materials. SEM, nano-CT, and ray-tracing simulations show that super black feathers have titled arrays of highly modified barbules, which cause more multiple scattering, resulting in more structural absorption, than normal black feathers. Super black feathers have an extreme directional reflectance bias and appear darkest when viewed from the distal direction. We hypothesize that structurally absorbing, super black plumage evolved through sensory bias to enhance the perceived brilliance of adjacent color patches during courtship display.
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            In situ immune response and mechanisms of cell damage in central nervous system of fatal cases microcephaly by Zika virus

            Zika virus (ZIKV) has recently caused a pandemic disease, and many cases of ZIKV infection in pregnant women resulted in abortion, stillbirth, deaths and congenital defects including microcephaly, which now has been proposed as ZIKV congenital syndrome. This study aimed to investigate the in situ immune response profile and mechanisms of neuronal cell damage in fatal Zika microcephaly cases. Brain tissue samples were collected from 15 cases, including 10 microcephalic ZIKV-positive neonates with fatal outcome and five neonatal control flavivirus-negative neonates that died due to other causes, but with preserved central nervous system (CNS) architecture. In microcephaly cases, the histopathological features of the tissue samples were characterized in three CNS areas (meninges, perivascular space, and parenchyma). The changes found were mainly calcification, necrosis, neuronophagy, gliosis, microglial nodules, and inflammatory infiltration of mononuclear cells. The in situ immune response against ZIKV in the CNS of newborns is complex. Despite the predominant expression of Th2 cytokines, other cytokines such as Th1, Th17, Treg, Th9, and Th22 are involved to a lesser extent, but are still likely to participate in the immunopathogenic mechanisms of neural disease in fatal cases of microcephaly caused by ZIKV.
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              Transcutaneous ultrasound energy harvesting using capacitive triboelectric technology

              A major challenge for implantable medical systems is the inclusion or reliable delivery of electrical power. We use ultrasound to deliver mechanical energy through skin and liquids and demonstrate a thin implantable vibrating triboelectric generator able to effectively harvest it. The ultrasound can induce micrometer-scale displacement of a polymer thin membrane to generate electrical energy through contact electrification. We recharge a lithium-ion battery at a rate of 166 microcoulombs per second in water. The voltage and current generated ex vivo by ultrasound energy transfer reached 2.4 volts and 156 microamps under porcine tissue. These findings show that a capacitive triboelectric electret is the first technology able to compete with piezoelectricity to harvest ultrasound in vivo and to power medical implants.
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                Author and article information

                Contributors
                elelc@nus.edu.sg
                hoonw@dgist.ac.kr
                Journal
                Bioelectron Med
                Bioelectron Med
                Bioelectronic Medicine
                BioMed Central (London )
                2332-8886
                30 November 2020
                30 November 2020
                2020
                : 6
                : 23
                Affiliations
                [1 ]GRID grid.417736.0, ISNI 0000 0004 0438 6721, Daegu Geongbuk Institute of Science and Technology (DGIST), ; Daegu, 42899 Republic of Korea
                [2 ]GRID grid.4280.e, ISNI 0000 0001 2180 6431, Electrical & Computer Engineering, , National University of Singapore, ; Singapore, 117583 Singapore
                [3 ]GRID grid.4280.e, ISNI 0000 0001 2180 6431, Center for Intelligent Sensors and MEMS (CISM), , National University of Singapore, ; Singapore, 117608 Singapore
                [4 ]GRID grid.4280.e, ISNI 0000 0001 2180 6431, NUS Graduate School for Integrated Science and Engineering (NGS), , National University of Singapore, ; Singapore, 117456 Singapore
                Author information
                http://orcid.org/0000-0002-8886-3649
                Article
                59
                10.1186/s42234-020-00059-z
                7706233
                33292861
                ca9a85b1-af1f-401d-8f28-169a7353cb16
                © The Author(s) 2020

                Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

                History
                : 15 September 2020
                : 5 November 2020
                Funding
                Funded by: National Research Foundation: Competitive Research Project
                Award ID: NRF-CRP10-2012-01
                Award Recipient :
                Funded by: The Agency for Science, Technology and Research (A*STAR), Singapore and Narodowe Centrum Badań i Rozwoju (NCBR), Poland Joint Grant
                Award ID: R-263-000-C91-305
                Award Recipient :
                Funded by: DGIST R&D Program of the Ministry of Science and ICT
                Award ID: 2020010043
                Award Recipient :
                Funded by: National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT)
                Award ID: NRF-2019R1C1C1008344
                Award Recipient :
                Categories
                Review
                Custom metadata
                © The Author(s) 2020

                peripheral nerve interface,wireless neural interface,energy harvesters,ultrasound stimulation,magnetic stimulation,bioelectronic medicine

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