{"id":1096,"date":"2026-05-12T08:45:48","date_gmt":"2026-05-12T08:45:48","guid":{"rendered":"https:\/\/cetaitdemain.org\/?p=1096"},"modified":"2026-05-12T08:45:48","modified_gmt":"2026-05-12T08:45:48","slug":"in-vivo-axon-regeneration-and-dependence-on-channel-cross-sectional-area-microchannel-scaffolds-with-three-different-microchannel-cross-sectional-areas-50-m-100-m-100-m-100-m-or-150-m-10","status":"publish","type":"post","link":"https:\/\/cetaitdemain.org\/?p=1096","title":{"rendered":"\ufeffIn vivo axon regeneration and dependence on channel cross-sectional area == Microchannel scaffolds with three different microchannel cross-sectional areas, 50 m 100 m, 100 m 100 m or 150 m 100 m, were implanted for eight weeks to characterize the impact cross-sectional area has on nerve regeneration in a nerve amputee model"},"content":{"rendered":"

\ufeffIn vivo axon regeneration and dependence on channel cross-sectional area == Microchannel scaffolds with three different microchannel cross-sectional areas, 50 m 100 m, 100 m 100 m or 150 m 100 m, were implanted for eight weeks to characterize the impact cross-sectional area has on nerve regeneration in a nerve amputee model. of organization, adoption of the microchannel architecture forming microchannel fascicles, reformation of endoneurial tubes and axon myelination, and a lack of aberrant and unorganized growth that might be characteristic of neuroma formation. Separate chronic terminalin vivoelectrophysiology studies utilizing the microchannel scaffolds with permanently integrated microwire electrodes were conducted to evaluate interfacing capabilities. In all devices a variety of spontaneous, sensory evoked and electrically evoked single and multi-unit action potentials were recorded after five months of implantation. Together, these findings suggest that microchannel scaffolds are well suited for chronic implantation and peripheral nerve interfacing to promote organized nerve regeneration that lends itself well to stable interfaces. Thus this study establishes the basis for the advanced fabrication of large-electrode count, wireless microchannel devices that are an important step towards highly functional, bi-directional peripheral nerve interfaces. Keywords: Neural prosthesis, Nerve regeneration, Nerve guide, Polydimethylsiloxane, Scaffold, Peripheral nerve interfacing, Neural interfacing, Microchannel == 1 . Introduction == Prosthetics aim to restore the functional capacity once held by an amputee. A number of neural prostheses have been developed with the goal to artificially substitute or mimic sensorimotor functions in patients. For instance, this goal can be accomplished via an interface with the peripheral nervous system by means of implanted electrodes capable of neuromuscular stimulation and neural signal recording. Stable bi-directional communication could allow for a natural control over advanced prosthetic limbs and other similar assistive devices for amputees. State of the art peripheral nerve interfacing has centered around three main types of device designs: cuff, penetrating, and regenerative sieve electrodes. Cuff and penetrating interfaces face a large tradeoff between the ability to selectively interface with individual axons versus the amount of disruption to the nerve and long-term stability as a result of trying to get in close proximity to axons [1]. Cuff electrodes, which wrap MGC7807<\/a> around the nerve, cause minimal damage and provide long-term stability at the expense of stimulation\/recording specificity due to a lack GSK591 of direct contact with individual axons [14]. In contrast the Utah Slanted Electrode Array (USEA) penetrates the nerve and provides enhanced specificity through direct contact between the electrodes and axons. However , the insertion causes injury and the electrodes elicit chronic inflammation and scar tissue [5]. An alternative to GSK591 combat these negative outcomes is a regenerative approach, where transected axons grow into specific geometries within close proximity of electrodes [6]. The hallmark Sieve Electrode is implanted so axons are forced to regenerate through its many perforations\/holes making contact with ring electrodes [7]. However , this design has few viable electrodes because the extracellular potential of an axons action potential (AP) is small. Furthermore, GSK591 there is a spatial dependence GSK591<\/a> of the electrodes to the nodes of Ranvier, which occur at least every 2 mm and are where the extracellular potential is largest [1, 810]. Microchannels offer a unique opportunity to take advantage of the regenerative approach GSK591 while circumventing issues with small APs and the node of Ranvier dependence, as detailed elsewhere [2, 9, 1113]. Briefly, if a nerve regenerates through electrically insulating microchannels, small groups of axons can be isolated from each other and the surrounding low impedance extracellular fluid. Limiting the extracellular volume increases the extracellular resistance and from Ohms law, increases the extracellular potential of an axons AP [2]. Using microchannels with a length of 3 mm ensures a node of Ranvier will always be contained within the microchannels making them spatially independent of the nodes. Such conditions have been validatedin vitro. APs from axons were recorded from inside a microchannel, the spatial position of the axons changed, and recordings taken again without any significant difference in AP signal amplitude [9]. However , the underlying success of a regenerative microchannel interface as a dependable solution for neural interfacing is not only its ability to detect high quality APs, but also a function of long term tolerance by the peripheral nervous system. Thus, the neural implant is inherently dependent on the chronic condition of the matured nerve post-regeneration. To prevent neuropathic complications post-implantation, the device must facilitate sufficient room for nerve maturation over time while in close contact with as many axons as possible to obtain clear neural signals. The device must also facilitate healthy nerve characteristics such as a maintained tissue architecture, established myelinated fibers, and prominent axon profiles through the regeneration and maturation phases [7, 14, 15]. Lacking such nerve characteristics has proven to yield poor nerve functionality, compressive axonopathy, and neuromas which result in poor.<\/p>\n","protected":false},"excerpt":{"rendered":"

\ufeffIn vivo axon regeneration and dependence on channel cross-sectional area == Microchannel scaffolds with three different microchannel cross-sectional areas, 50 m 100 m, 100 m 100 m or 150 m 100 m, were implanted for eight weeks to characterize the impact cross-sectional area has on nerve regeneration in a nerve amputee model. of organization, adoption …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[47],"tags":[],"class_list":["post-1096","post","type-post","status-publish","format-standard","hentry","category-p56lck","entry entry-center"],"_links":{"self":[{"href":"https:\/\/cetaitdemain.org\/index.php?rest_route=\/wp\/v2\/posts\/1096","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cetaitdemain.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cetaitdemain.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cetaitdemain.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/cetaitdemain.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1096"}],"version-history":[{"count":1,"href":"https:\/\/cetaitdemain.org\/index.php?rest_route=\/wp\/v2\/posts\/1096\/revisions"}],"predecessor-version":[{"id":1097,"href":"https:\/\/cetaitdemain.org\/index.php?rest_route=\/wp\/v2\/posts\/1096\/revisions\/1097"}],"wp:attachment":[{"href":"https:\/\/cetaitdemain.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1096"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cetaitdemain.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1096"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cetaitdemain.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1096"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}