Optimal selection of multipolar electrode configurations for nerve burst detection

Avdeew, Yvan; Rolle, Virginie Le; Laval, Victor Berge; Gestreau, Christian; Hernández, Alfredo

doi:10.1109/embc48229.2022.9871144

Cited by 1 publication

(2 citation statements)

References 7 publications

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“…However, it has been demonstrated that bipolar, tripolar, or multipolar configurations may have a positive impact on the functionality of electrodes in both stimulation, [41,45,46] and recording modes. [47][48][49] For stimulation, the multipolar configuration aims to actively restrict the field of excitation, consequently increasing selectivity. The selectivity of stimulation may be also affected by the stimulus pulse characteristics.…”

Section: Advantages Limitations and Further Workmentioning

confidence: 99%

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Engineered Graphene Material Improves the Performance of Intraneural Peripheral Nerve Electrodes

Rodríguez‐Meana,

del Valle,

Viana

et al. 2024

Advanced Science

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Limb neuroprostheses aim to restore motor and sensory functions in amputated or severely nerve‐injured patients. These devices use neural interfaces to record and stimulate nerve action potentials, creating a bidirectional connection with the nervous system. Most neural interfaces are based on standard metal microelectrodes. In this work, a new generation of neural interfaces which replaces metals with engineered graphene, called EGNITE, is tested. In vitro and in vivo experiments are conducted to assess EGNITE biocompatibility. In vitro tests show that EGNITE does not impact cell viability. In vivo, no significant functional decrease or harmful effects are observed. Furthermore, the foreign body reaction to the intraneural implant is similar compared to other materials previously used in neural interfaces. Regarding functionality, EGNITE devices are able to stimulate nerve fascicles, during two months of implant, producing selective muscle activation with about three times less current compared to larger microelectrodes of standard materials. CNAP elicited by electrical stimuli and ENG evoked by mechanical stimuli are recorded with high resolution but are more affected by decreased functionality over time. This work constitutes further proof that graphene‐derived materials, and specifically EGNITE, is a promising conductive material of neural electrodes for advanced neuroprostheses.

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Section: Advantages Limitations and Further Workmentioning

confidence: 99%

“…Moreover, the noise decrease improves the quality of signal recordings. [47,49,51] Therefore, future studies using the newly developed EGNITE-based electrodes may assess refinements in the electrode configurations to improve selectivity and efficiency of the bidirectional communication.…”

Section: Advantages Limitations and Further Workmentioning

confidence: 99%