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Open research questions in Neurological disorders and treatments

41 unresolved questions extracted from the limitations and future-work sections of 278 Neurological disorders and treatments papers in our library. Each links back to the study that raised it.

What the literature leaves open

  • In Parkinson’s disease (PD), NIBS is of particular interest because several motor and nonmotor symptoms remain insufficiently controlled by pharmacological or surgical treatments.

    Noninvasive Brain Stimulation for Parkinson’s Disease: Therapeutic Applications and Clinical Perspectives · 2026 · DOI

  • Advances in bidirectional DBS devices have revealed that stimulation can modify gamma oscillations via subharmonic entrainment, though entrainments therapeutic role remains unclear.

    Entrainment of cortical gamma oscillations predicts improved bradykinesia and dyskinesia in Parkinson's disease · 2026 · DOI

  • Deep brain stimulation has shown promise as an intervention but has yielded inconsistent outcomes, potentially due to the complex biopsychosocial nature of MDD and the lack of standardized large animal models.

    The neuroanatomy and connectivity of the ventral striatum and ventral capsule area in the Göttingen minipig · 2026 · DOI

  • The Göttingen minipig (GM) is an emerging non-primate large animal model; however, the anatomy and connectivity of the GM VS/VC remain poorly characterized.

    The neuroanatomy and connectivity of the ventral striatum and ventral capsule area in the Göttingen minipig · 2026 · DOI

  • CaMKIIα-expressing neurons in the subthalamic nucleus (STN) have been associated with arousal-related pain perception and impulse regulation, but their role in propofol anesthesia remains unclear.

    Subthalamic CaMKIIα-expressing neurons facilitate recovery from propofol anesthesia via the STN–ventral pallidum pathway · 2026 · DOI

  • However, in view of the retrospective design, limited baseline characterization, absence of multivariable adjustments, and lack of formal control for multiple comparisons, these associations should be interpreted as exploratory and hypothesis-generating, and they need to be validated in larger multicenter prospective random- ized studies.

    Effect of 6S refined individualized nursing management in the perioperative period of Parkinson’s disease patients undergoing deep brain stimulation · 2026 · DOI

  • Overall, both invasive and non-invasive neuromodulation tech- niques demonstrate promising effects on reducing post-stroke pain, although the degree and consistency of improvement vary across stud- ies (18, 122). Some evidence suggests that invasive stimulation tech- niques, particularly DBS, may produce more robust and sustained analgesic effects in patients with refractory central post-stroke pain (CPSP) (33, 49, 79, 80). Conversely, research has also shown that non- invasive brain stimulation (NIBS) techniques may reduce the impact of some types of post-stroke pain at similar levels as invasive modali- ties, without the significant surgical risks (10, 18, 22, 106, 122, 124). As such, utilization of safer, more readily available forms of NIBS makes them attractive first-line options for pain modulation in many cases. Importantly, the substantial variability in stimulation parame- ters, target regions, patient selection criteria, and outcome measures makes direct comparisons difficult between different forms of neuro- modulation. Large-scale, well-controlled clinical trials directly com- paring invasive and non-invasive techniques are needed to aid in clinical decision-making. The use of brain stimulation techniques, particularly NIBS, is a burgeoning field with many lingering questions. Future research should focus on attempting to optimize stimulation protocols in PSP patients, focusing on outcomes depending on the type of pain being evaluated. Additionally, while some studies have shown spasticity and pain improve with a combination of neuromodula- tion, particularly TMS (25, 27, 113), and motor rehabilitation, other research demonstrates TMS alone is able to improve pain outcomes (10, 52, 70, 111, 116, 118). There is limited evidence comparing brain stimulation alone versus a combined treatment with rehabilitation for pain outcomes, making large-scale studies comparing these approaches essential for optimizing clinical out- comes. Finally, mechanistic studies using advanced neuroimaging and neurophysiological assessments will be critical for under- standing how neuromodulation alters pain-processing networks post-stroke, guiding personalized and precision-based interven- tions in this challenging clinical domain (14, 16, 26, 55).

    Neuromodulation approaches and applications in the management of post-stroke pain: a comprehensive review · 2026 · DOI

  • The paper does not specify the preprocessing pipeline details (noise removal algorithms, artifact rejection criteria, connectivity measure selection) used before point representation. Detailed ablation studies comparing different connectivity metrics (correlation, mutual information, graph metrics) and their impact on Delaunay triangulation topology and clinical diagnostic accuracy are absent.

    Locating and Isolating Neurological Disorders in MRI Datasets Using Hardware-Accelerated Delaunay Triangulation · 2026 · DOI

  • The framework identifies abnormal connectome patterns visually (Figures 6b–h) but lacks quantitative biomarkers or classification metrics for discriminating specific neurological disorders. Development of automated classification algorithms that extract discriminative features from Delaunay-triangulated connectomes to diagnose stroke, acoustic tumors, or Waldenström's macroglobulinemia from normal controls is needed.

    Locating and Isolating Neurological Disorders in MRI Datasets Using Hardware-Accelerated Delaunay Triangulation · 2026 · DOI

  • The methodology for converting connectivity strength into 3-D point representation and interpreting Delaunay triangulation edges as brain region connections lacks quantitative validation against ground-truth structural connectivity. Comparative analysis between Delaunay-derived connectome topology and gold-standard diffusion tensor imaging (DTI) fiber tractography or invasive electrophysiology is absent.

    Locating and Isolating Neurological Disorders in MRI Datasets Using Hardware-Accelerated Delaunay Triangulation · 2026 · DOI

  • The paper demonstrates hardware-accelerated processing times (6.57–16.21 seconds) for datasets with 304–351 images, but does not evaluate performance scaling with significantly larger volumetric datasets or real-time clinical workflows. Testing the CUDA-accelerated Delaunay triangulation algorithm on high-resolution 4D temporal connectome data and assessing latency requirements for interactive surgical navigation is required.

    Locating and Isolating Neurological Disorders in MRI Datasets Using Hardware-Accelerated Delaunay Triangulation · 2026 · DOI

  • The effects of anesthesia on microelectrode recordings and local field potentials during DBS surgery require further consideration, as anesthetic agents like sevoflurane and isoflurane can affect single unit and local field potential recordings.

    Cortical and basal ganglia beta oscillations and frequency-dependent DBS effects in the A53T Parkinson’s disease rat model · 2026 · DOI

  • Limited discussion of long-term outcome prediction beyond the follow-up period examined in the CSP468 study; durability and sustainability of motor improvements over extended timeframes remain unclear.

    Predictors of motor outcome with pallidal stimulation for Parkinson’s disease from the CSP468 cohort · 2026 · DOI

  • Although the use of DBS has been approved by the FDA under a Humanitarian Device Exemption for the treatment of treatment-resistant obsessive-compulsive disorder, studies systematically investigating the potential use of DBS for various severe chronic psychiatric disorders are in their earliest stages, and further studies are warranted.

    Update on Deep Brain Stimulation · 2014 · DOI

  • Recent studies have shown an increase in beta frequency of local-field potentials in the basal-ganglia during FoG, however, comprehensive research on the synchronization between different brain locations and frequency bands in PD patients is scarce.

    Suchen und finden:Intentionalität AlS interne und externe beziehung · 2005 · DOI

  • he precise mechanism through which Deep Brain Stimulation (DBS) mitigates freezing episodes in Parkinson's disease remains unknown.

    Modeling Parkinsonian Freezing and Deep Brain Stimulation Effects in a Basal Ganglia Network · 2026 · DOI

  • Prominent non-motor features including cognitive impairment, autonomic failure and sleep disturbance indicate widespread neurodegeneration that remains incompletely characterised.

    Decades of Parkinson's disease neuropathology yield a sparse and underpowered map of neuronal vulnerability: a systematic review and meta-analysis · 2026 · DOI

  • This heterogene- ity may include a wide range of factors that are not fully investigated or clearly stated in the articles, or that cannot be analyzed due to insufficient available data for data syn- thesis, such as the duration of stimulation or stimulation programming.

    Deep brain stimulation for freezing of gait in Parkinson’s disease: An updated systematic review, meta-analysis, and a single-center clinical experience · 2026 · DOI

  • No control for intentional or diseaserelated weight change (e.g., dieting, intercurrent illness) Absence of psychosocial, behavioral, and metabolic variables (e.g., diet, physical activity, mood, endocrine…

    Active electrode location does not influence weight gain after subthalamic nucleus deep brain stimulation surgery in Parkinson disease · 2026 · DOI

  • The progressive nature of neurodegeneration in animal models raises questions about whether observed compensatory mechanisms reflect endogenous neuroprotective processes versus progressive compensation during disease evolution.

    Cortical and basal ganglia beta oscillations and frequency-dependent DBS effects in the A53T Parkinson’s disease rat model · 2026 · DOI

  • The relationship between physiological oscillatory changes and motor symptom severity needs further investigation, as oscillations alone may not be sufficient to explain all aspects of parkinsonian pathology.

    Cortical and basal ganglia beta oscillations and frequency-dependent DBS effects in the A53T Parkinson’s disease rat model · 2026 · DOI

  • The role of levodopa response as a predictor is cited as revisited in recent work, suggesting ongoing uncertainty about its predictive validity that is not fully resolved in this study.

    Predictors of motor outcome with pallidal stimulation for Parkinson’s disease from the CSP468 cohort · 2026 · DOI

  • This new technique supports a significant expansion of functional neurosurgery to predict effective stimulation targets in a wide range of disorders of brain function, including those for which the optimal target is not yet known.

    Stereotactic Awake Basal Ganglia Electrophysiological Recording and Stimulation (SABERS): A Novel Staged Procedure for Personalized Targeting of Deep Brain Stimulation in Pediatric Movement and Neuropsychiatric Disorders · 2024 · DOI

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41 open questions have been extracted from the limitations and future-work passages of 278 Neurological disorders and treatments 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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