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Open research questions in Neurobiology and Insect Physiology Research

49 unresolved questions extracted from the limitations and future-work sections of 255 Neurobiology and Insect Physiology Research papers in our library. Each links back to the study that raised it.

What the literature leaves open

  • However, tra does not widely mediate sex determination across insects, the unifying molecular pathway governing female-biased sexual size dimorphism (SSD) remains poorly defined in non-drosophilid insects.

    Doublesex-mediated regulation of insulin signaling drives sex-specific body growth · 2026 · DOI

  • Several mechanistic questions remain to be addressed. Although our results implicate α -expressing octopaminergic neurons in EB-induced ovulation defects, how these neurons GluCl communicate with the ovary to regulate follicle rupture remains unclear. In addition, the cellular origin and temporal dynamics of ovarian ecdysteroid synthesis during EB exposure remain to be defined. Our transcriptomic analyses also identified additional differentially expressed genes that may contribute to EB-induced reproductive defects, and their functional roles should be validated in future studies.

    A pesticide hijacks a neurohormonal circuit to block ovulation in insects · 2026 · DOI

  • Extracellular, BPI-related TDPs of insects (B-TDPs, also known as Takeout-related proteins), are often found in chemosensory organs, but little is known regarding their exact location or how they could contribute to olfaction or gustation.

    The BPI-like TULIP domain proteins of Drosophila melanogaster: a novel class of candidate odorant transporters. · 2026 · DOI

  • Although polarisation-based navigation has been extensively studied behaviourally, computational models that link DRA anatomy with navigational performance are lacking.

    From eye anatomy to navigation: a biologically accurate model of bees polarisation vision · 2026 · DOI

  • While courtship index (CI) is widely used to quantify mating activity, other timing metrics like courtship latency, copulation latency (CL), and mating duration (MD) remain understudied.

    Simple Methods to Acutely Measure Multiple Timing Metrics among Sexual Repertoire of Male Drosophila · 2026 · DOI

  • Following odor offset, projection neurons (PNs) in the insect antennal lobe (AL) exhibit transient increases in firing rate, termed OFF responses, yet the circuit mechanisms that generate them in recurrent excitatory-inhibitory networks remain poorly understood.

    Data-Constrained Recurrent Network Neural Model Uncovers the Circuit Mechanism of Olfactory OFF Responses · 2026 · DOI

  • How fitness variation arises among males consuming healthy amounts of DL remains unknown, as do the fitness parameters being affected, including paternal effects.

    Drosophila sperm carry a dietary sterol that increases offspring development · 2026 · DOI

  • 
Through our analysis and survey, we identify open questions and research directions to deepen our understanding of the neuroethology of flight behavior in bees, as well as recent trends in the development of bio-inspired robotics research that operates at the interfaces of biology, engineering, and robotics.

    Bees in clutter: observing flight strategies to inspire visually guided autonomous navigation · 2026 · DOI

  • The comparison of terminal metrics between mounting media (Fluoromount-G vs. Vectashield) used different statistical tests (Student's t-test for terminal length, Welch's t-test for complexity), but comprehensive validation of how different mounting media preserve three-dimensional ultrastructural features during confocal imaging of Drosophila terminals has not been reported.

    Assessment of adult structural plasticity in Drosophila neurons · 2026 · DOI

  • Ex vivo brain preparations were imaged immediately after dissection in filtered medium, but the temporal dynamics of structural plasticity changes in Drosophila neurons during extended ex vivo recording periods (beyond the immediate post-dissection window) remain uncharacterized.

    Assessment of adult structural plasticity in Drosophila neurons · 2026 · DOI

  • Terminal length and complexity metrics were quantified using Fiji measurement of linear distance from branching points, but the validation of this two-dimensional measurement approach against three-dimensional volumetric reconstruction of terminal arbors in adult Drosophila neurons has not been performed.

    Assessment of adult structural plasticity in Drosophila neurons · 2026 · DOI

  • The study used sample sizes of 10-29 animals per experimental replicate at 25°C for power simulations, but the statistical power and effect sizes for detecting structural plasticity changes in Drosophila neurons across different temperature conditions (varying light intensity and temperature as fixed effects) have not been systematically evaluated across broader sample size ranges.

    Assessment of adult structural plasticity in Drosophila neurons · 2026 · DOI

  • Abstract The vomeronasal organ (VNO), sometimes known as Jacobson’s organ, is a vestigial anatomical feature in humans whose function and evolutionary relevance remain controversial.

    A review of the vomeronasal organ in humans: an enigmatic sensory structure · 2025 · DOI

  • However, soma transcriptomes of individual human (h)DRG neurons-critical information to decipher their functions-are lacking due to technical difficulties.

    Leveraging deep single-soma RNA sequencing to explore the neural basis of human somatosensation · 2024 · DOI

  • The spatial and temporal structure of olfactory responses to odors beyond CO2 has not been characterized in the context of lateral interactions. Future work must determine how lateral signaling between olfactory afferents reshapes responses to other odorants in both insects and mammals, and establish the relationship between these neural transformations and odor-driven behavior.

    Sensory biology: Olfactory crosstalk reshapes odor coding · 2022 · DOI

  • VA2 glomeruli exhibited a dramatic potentiation of CO2 responses (~30 minutes) during experimental recordings that was not observed in V glomeruli or other odor responses in VA2, and did not depend on prior CO2 exposure. The mechanism underlying this time-dependent potentiation and its behavioral relevance must be elucidated to understand state-dependent changes in olfactory coding.

    Sensory biology: Olfactory crosstalk reshapes odor coding · 2022 · DOI

  • The lateral interactions in olfactory sensory neurons characterized in the study operate through an unknown mechanism, as disrupting acetylcholine, GABA, glutamate, and shakB-mediated electrical coupling did not affect non-canonical CO2 responses in the antennal lobe. The specific molecular or cellular pathway mediating these lateral interactions between olfactory afferents must be identified.

    Sensory biology: Olfactory crosstalk reshapes odor coding · 2022 · DOI

  • BACKGROUND: Sexual-size dimorphism (SSD) is replete among animals, but while the selective pressures that drive the evolution of SSD have been well studied, the developmental mechanisms upon which these pressures act are poorly understood.

    Sex-specific plasticity and the nutritional geometry of insulin-signaling gene expression in Drosophila melanogaster · 2021 · DOI

  • The structural insights into Orco do not address how the seven-transmembrane topology and ion channel function vary across the divergent family of odorant receptors identified in Drosophila, nor do they specify which receptor variants would require individual structural determination to understand their unique coding properties for different odorant classes.

    Sensory Biology: Structure of an Insect Chemoreceptor · 2018 · DOI

  • The paper references odorant specificity determination at extracellular loop 2-transmembrane domain 4 interfaces in Anopheles gambiae receptors (reference 9), but does not provide comparative structural analysis across multiple odorant receptor subtypes to establish whether this interface is conserved or variant-specific for odorant recognition.

    Sensory Biology: Structure of an Insect Chemoreceptor · 2018 · DOI

  • The heteromeric function of insect odorant receptors with the Orco co-receptor is established through references to prior work, but the structural paper does not address how mutations in Orco (analogous to the CHRNA5 rs16969968 SNP in nicotinic receptors) would alter the ligand-gated ion channel properties or how such mutations could be systematically studied using the Orco structure.

    Sensory Biology: Structure of an Insect Chemoreceptor · 2018 · DOI

  • The application to rational design of compounds that interfere with disease vector odorant receptor signaling in mosquitoes like Anopheles gambiae is mentioned, but the paper lacks specific guidance on which odorant receptor subtypes (e.g., Or1, Or10) in malaria mosquitoes should be targeted or what structural features of Orco homologs would be most suitable for antagonist design.

    Sensory Biology: Structure of an Insect Chemoreceptor · 2018 · DOI

  • The cryo-EM structure of the insect olfactory receptor Orco provided by Butterwick et al. establishes a structural foundation, but the paper does not specify structural studies needed for other odorant receptor subtypes beyond Orco or investigations of how different odorant ligands bind to specific receptor variants to determine ligand-binding specificity at the atomic level.

    Sensory Biology: Structure of an Insect Chemoreceptor · 2018 · DOI

  • Nonetheless, a connection between PRICKLE function and ASD warrants further investigation.

    DROSOPHILA PRICKLE MUTANTS DISPLAY COMORBID NEUROLOGICAL PHENOTYPES AND PROVIDE A GENETIC LINK BETWEEN EPILEPSY AND AUTISM SPECTRUM DISORDER · 2026 · DOI

  • How separate, but connected elements, within a network might respond differently to a CP perturbation is not well understood.

    Heterogeneous responses to embryonic critical period perturbations within the Drosophila larval locomotor circuit. · 2026 · DOI

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49 open questions have been extracted from the limitations and future-work passages of 255 Neurobiology and Insect Physiology Research 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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