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Open research questions in Neuroscience and Neural Engineering

27 unresolved questions extracted from the limitations and future-work sections of 133 Neuroscience and Neural Engineering papers in our library. Each links back to the study that raised it.

What the literature leaves open

  • Critically, the suturable mechanical fixation and direct epidermal interface of NeuroWeaves provide inherent stability analogous to surgical sutures, supporting continuous recordings over days to weeks without gel degradation or adhesive failure, and positioning this platform for truly extended ambulatory use. Finally, we emphasize that the current implementation represents only the first iteration of this modality. Future versions could incorporate higher-density layouts, multimodal sensing, or closed-loop capabilities while retaining compatibility with suture-based deployment. Such advances, combined with the clinical usability demonstrated here, may help establish a new class of minimally invasive neural interfaces that bridge the gap between laboratory-grade electrophysiology and everyday neurotechnology for at-home use.

    A Minimally Invasive, Suturable Platform for Brain Monitoring · 2026 · DOI

  • Thus, while acute cochlear implant stimulation evoked spatially non-random cortical activity with coarse cochleotopic structure, the dynamics of network activity were substantially different from those evoked by acoustic stimulation, with possible implications for perceptual similarity that remain to be tested.

    Distinct cortical encoding of acoustic and electrical cochlear stimulation · 2026 · DOI

  • Among these, nanostructured zirconium oxide (ns-ZrOx) thin films have recently demonstrated memristive and signal-processing capabilities compatible with biohybrid neural systems, yet their interaction with heterogeneous neuroglial networks remains poorly understood.

    Nanostructured Zirconia thin films as neurogliomorphic interface for neural cells of central and peripheral nervous system · 2026 · DOI

  • Abstract Spatial selectivity remains a major limitation of non-invasive functional electrical stimulation (FES), particularly in anatomically dense regions of the upper limb.

    Biophysical and Functional Evaluation of Concentric Electrodes for Localised Non-Invasive FES · 2026 · DOI

  • Serotonergic psychoplastogens can produce durable cortical remodeling, but how a brief exposure to the 5-HT2A agonist 2,5-dimethoxy-4-iodoamphetamine (DOI) reshapes population activity and functional connectivity remains unclear.

    Acute DOI exposure drives cortical hyperexcitability and functional network remodeling · 2026 · DOI

  • Whether such cell shape independence holds for realistic cell morphologies should be further examined with more complex models [25,33]. The experimental volume fractions used in this study were obtained by fitting the measured ion concentration to isotropic diffusion equations, which did not account for anisotropy [30].

    Mesoscale tissue properties and electric fields in brain stimulation: Bridging the macroscopic and microscopic scales using layer-specific cortical conductivity · 2026 · DOI

  • The mechanisms by which anesthetics influence action-potential waveforms remain unclear; potential contributors include changes in membrane ion-channel activity and differential modulation of GABAergic or glutamatergic transmitter systems45,46.

    State-dependent neuronal and network dynamics in the lateral hypothalamus across sevoflurane anesthesia–emergence revealed by microelectrode arrays · 2026 · DOI

  • The nonlinear physics of magnetoelectric nanoparticles requires careful tailoring of applied magnetic field strength and frequency to both nanoparticle properties and biological media characteristics, but comprehensive guidelines for this optimization across diverse biological contexts remain underdeveloped.

    Magnetoelectric Nanoparticle‐Based Wireless Brain–Computer Interface: Underlying Physics and Projected Technology Pathway · 2026 · DOI

  • Although the analysis was conducted for the inductive receiver, it could be easily modified to match any other magnetometer type (e.g., OPM, TMR sensor, SERF, NV center), but such modifications have not been explicitly detailed or validated.

    Magnetoelectric Nanoparticle‐Based Wireless Brain–Computer Interface: Underlying Physics and Projected Technology Pathway · 2026 · DOI

  • Whether the recorded neuronal populations correspond to specific neurotransmitter-defined cell types remains to be determined, which would provide deeper insights into the fine-tuned regulatory mechanisms of VTA neural circuits in sleep-wake dynamics.

    Highly mechanically stable PEDOT:PSS/PDA-modified microelectrode arrays reveal state-specific dynamic neural activity across sleep-wake · 2026 · DOI

  • For the current study, we used a simplified full-field stimulus. With this simplification we could gather responses from thousands of RGCs more quickly, however our ability to unambiguously categorize the visual response of individual cells was diminished. For example, if an on cell has a strong enough off surround, it may be categorized as on–off or even off with the present stimulus. Similarly, response latencies and durations can be contaminated when a full-field stimulus is used.

    Adaptation of visual responses in degenerating rd10 and healthy mouse retinas during ongoing electrical stimulation · 2026 · DOI

  • Although several approaches for neural dust have emerged, a procedure for implanting them in batches that builds upon the safety and performance of currently used electrodes remains to be demonstrated.

    A method for efficient, rapid, and minimally invasive implantation of individual non-functional motes with penetrating subcellular-diameter carbon fiber electrodes into rat cortex · 2026 · DOI

  • Quantitative safety limits for DC delivered through metal electrodes directly to the brain remain poorly defined.

    Safety of Subdural Direct Current Stimulation: A Histological Study in the Ovine Brain · 2026 · DOI

  • Analog stimulation preserves the continuous acoustic waveform and may better encode temporal information, yet it has not been systematically evaluated in combination with modern current-focusing strategies.

    Revisiting Analog Electrical Stimulation with Current Focusing in a Guinea Pig Model of Cochlear Implants. · 2026 · DOI

  • We found that there was a coarse, non-random spatial organization with limited evidence for consistent, sharply graded cochleotopy across recording sites, relative to a clearer tonotopic spatial representation in normal-hearing rats.

    Distinct cortical encoding of acoustic and electrical cochlear stimulation · 2026 · DOI

  • Abstract The biophysical determinants of cortical tissue injury during brief, high-frequency transcortical electrical stimulation remain incompletely understood.

    Energy-dependent cortical injury thresholds in high-frequency transcortical electrical stimulation: a biophysical study in a rat model · 2026 · DOI

  • Despite technological progress, a full understanding of hippocampal rhythms, neuronal population activity, and the underlying connectivity remains elusive, partly due to its complex morphology in a croissant-like shape which limits coronal and sagittal approaches.

    Hippocampal tangential insertions of high-density silicone probes in head-fixed mice enhance spatial sampling · 2026 · DOI

  • The paper discusses a two-stage frequency strategy (low-frequency targeting followed by high-frequency modulation) but extensive experimental validation of this approach across different neural cell types and tissues is not yet complete.

    Magnetoelectric Nanoparticle‐Based Wireless Brain–Computer Interface: Underlying Physics and Projected Technology Pathway · 2026 · DOI

  • While in vitro studies indicate MENPs can drive calcium transients and action potentials with efficacy comparable to optogenetic actuators, in vivo validation and clinical translation studies are lacking.

    Magnetoelectric Nanoparticle‐Based Wireless Brain–Computer Interface: Underlying Physics and Projected Technology Pathway · 2026 · DOI

  • Further detailed studies with advancement of materials, machine learning tools, and metastable physics are needed to understand the specifics of required spatiotemporal field profiles for optimal neuromodulation.

    Magnetoelectric Nanoparticle‐Based Wireless Brain–Computer Interface: Underlying Physics and Projected Technology Pathway · 2026 · DOI

  • Magnetoelectric nanoparticles display sensitivity depending non-linearly on core diameter, requiring further…

    Neural Interfaces for Bioelectronic Medicine · 2026 · DOI

  • Only three mice with high signal-to-noise ratios were used for spike sorting and neuronal classification, suggesting a potential limitation in sample size that may affect generalizability of findings.

    Highly mechanically stable PEDOT:PSS/PDA-modified microelectrode arrays reveal state-specific dynamic neural activity across sleep-wake · 2026 · DOI

  • The firing characteristics of different neuron types across behavioral states will be analyzed in detail in later sections, indicating incomplete analysis of neuron-type-specific firing patterns.

    Highly mechanically stable PEDOT:PSS/PDA-modified microelectrode arrays reveal state-specific dynamic neural activity across sleep-wake · 2026 · DOI

  • Further studies on nanoscale materials (for example, Pt nanoclusters), which enhance the stimulation efficacy by adding nanometre-scale roughness to the electrode surface, can be interesting future work for achieving higher visual acuity.

    Liquid-metal-based three-dimensional microelectrode arrays integrated with implantable ultrathin retinal prosthesis for vision restoration · 2024 · DOI

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27 open questions have been extracted from the limitations and future-work passages of 133 Neuroscience and Neural Engineering papers in our library. Each one below links back to the study that raised it, so you can read the original claim in context.

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