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Open research questions in Neuroscience and Neural Engineering

89 unresolved questions extracted from the limitations and future-work sections of 247 Neuroscience and Neural Engineering papers in our library. Each links back to the study that raised it.

What the literature leaves open

  • The review was not intended to constitute an exhaustive systematic review or a meta-analysis. The substantial heterogeneity of the available literature in terms of interface technologies, anatomical targets, study designs, populations, sensory modalities, outcome measures, and follow-up duration. Most technologies remain investigational. Important challenges remain regarding long-term stability, standardization of clinical outcomes, scalability, and widespread clinical implementation. The available evidence supports improvements in selected laboratory outcomes and embodiment, but consistent long-term clinical and quality-of-life benefits have not been established.

    Neural Interfaces for Bidirectional Sensory Restoration in Limb Prostheses: Current Evidence and Clinical Translation · 2026 · DOI

  • Long-term stability, patient-centered functional outcomes, and scalable clinical implementation remain challenges for the widespread adoption of somatosensory neuroprostheses. Clinical translation of neural interface technologies from experimental laboratory research to clinical application is limited.

    Neural Interfaces for Bidirectional Sensory Restoration in Limb Prostheses: Current Evidence and Clinical Translation · 2026 · DOI

  • The study used a single patient, - The arrays were not uniformly interleaved, - The comparison between macroelectrodes and microelectrodes was limited to the median-nerve condition, - The analysis was performed separately for high-gamma activity and SSEP, - The study did not investigate the long-term effects of the method

    Ultra high-density, 4096-channel intraoperative neurophysiological brain mapping for functional localization of the human central sulcus · 2026 · DOI

  • Investigating the use of the method in a larger patient population, - Comparing the results with other methods for intraoperative localization of the central sulcus, - Examining the effects of different array configurations and electrode densities, - Developing new methods for analyzing and interpreting the data

    Ultra high-density, 4096-channel intraoperative neurophysiological brain mapping for functional localization of the human central sulcus · 2026 · DOI

  • Our findings suggest that variability in scotoma perception constitutes an important, yet underexplored, factor contributing to inter-individual differences in the effectiveness of retinal prosthetic stimulation.

    Perceptual characteristics of scotomas modulate visual performance under simulated prosthetic vision · 2026 · DOI

  • However, the criteria dictating oxidation versus reduction in such Janus contact-electro-chemistry (CE-Chemistry) systems remain unclear.

    Unveiling Janus Chemical Processes in Contact-Electro-Chemistry through Oxygen Reduction Reactions · 2025 · DOI

  • Abstract Electrical conductivity is a pivotal biophysical factor for neural interfaces, though optimal values remain controversial due to challenges isolating this cue.

    Neural Tissue‐Like, not Supraphysiological, Electrical Conductivity Stimulates Neuronal Lineage Specification through Calcium Signaling and Epigenetic Modification · 2024 · DOI

  • Further studies can investigate the long-term stability of the microelectrode array. The technology can be applied to other areas of neuroscience research, such as studying neural activity in other brain regions.

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

  • There is a lack of high-temporal and spatial resolution tools to study neural activity in deep brain regions. The ventral tegmental area (VTA) plays a regulatory role in sleep-wakefulness, but direct electrophysiological evidence is lacking.

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

  • Future studies could investigate the effects of different types of electrical stimulation on visual response parameters. Future studies could explore the potential therapeutic applications of electrical stimulation for treating retinal degeneration. Future studies could examine the mechanisms underlying the adaptation of visual responses in degenerating retinas.

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

  • The study identifies a gap in our understanding of how ongoing electrical stimulation affects the visual response parameters of different RGC types. The study notes that there is a need for further research on the adaptation of visual responses in degenerating retinas.

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

  • The development of advanced neural interfaces - The exploration of alternative neuromodulation strategies - The investigation of key technological advancements that will shape the future of neural interfaces

    Neural Interfaces for Bioelectronic Medicine · 2026 · DOI

  • The need for advanced neural interfaces that can reliably cross the biotic/abiotic boundary - The requirement for coordinated advances in multiple fields

    Neural Interfaces for Bioelectronic Medicine · 2026 · DOI

  • The understanding of the nonlinear physics governing MENP operation and nanoparticle-cell interactions is incomplete. The development of a comprehensive theoretical framework for scalable and reliable MENP-based BCIs is needed.

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

  • The lack of studies on neuronal recording with electrical stimulation using inkjet-printed MEAs. The need for a low-cost, adaptable, and scalable technology for creating tailored neural interfaces.

    Inkjet-Printed Rough Gold Microelectrode Arrays on Flexible Substrates for Neural Recording and Electrical Stimulation · 2026 · DOI

  • High spatiotemporal resolution evidence of LH dynamics during anesthesia-emergence is lacking. The neural mechanisms of general anesthetics remain incompletely understood. The dynamic electrophysiological features of the LH during anesthesia-emergence are not well understood.

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

  • Chemical fixation results in an almost complete absence of the 40-80 nm wide extracellular gaps between cell membranes. The reconstructed cells may be free from distortion to an unknown extent. The model's 'extracellular space' subsumed intracellular regions of omitted cell structures.

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

  • The gap in the literature is the lack of accurate tissue conductivity representations that link underlying microscopic tissue structure with macroscopic assumptions. Mesoscale conductivity variations are largely absent from standard macroscopic models. The paper aims to address this gap by estimating layer-specific cortical conductivity using computational models.

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

  • Most commercial MEAs are restricted to planar, two-dimensional configurations. Traditional MEAs fail to capture the multilayered architecture of organoids.

    Multilayered microelectrode array for monitoring electrophysiological signals of 3d neural networks in cerebral organoid · 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

  • 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

  • Existing devices are typically not designed for long-term monitoring of injured nerves. Existing devices are fabricated from non-degradable materials. There is a need for a temporally biosynchronized, physically transient and flexible peripheral nerve interface.

    A temporally biosynchronized and physically transient peripheral nerve interface · 2026 · DOI

  • Evaluation of the long-term effects of collagen IV coating on neural progenitor cell culture. Comparison of collagen IV to other ECM coatings in terms of cost and scalability. Investigation of the use of collagen IV coated ITO neural interfaces for neural repair applications.

    Collagen IV outperforms alternative ECM coatings to preserve human neural progenitor properties on electrically conductive neural interfaces · 2026 · DOI

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89 open questions have been extracted from the limitations and future-work passages of 247 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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