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Articles by Igor Siwanowicz
Author Correction: Whole-brain, all-optical interrogation of neuronal dynamics underlying gut and vascular interoception in zebrafish
Correction to: Nature Communications https://doi.org/10.1038/s41467-026-76242-8, published online 27 August 2026 In the version of the article initially published, in the “Signal and noise correlation analysis” section of the Methods, “\( < \,\cdot \,{ > }_{t}\)” should have read “\( < \,\cdot \,{ > }_{k}\)”. This correction has been made to the HTML and PDF versions of the article.
Imaging cellular activity across all organs reveals body-wide circuits
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Abstract An animal’s ability to survive and thrive—whether fleeing from danger, eating a meal, or fighting an infection—arises from the collective moment-to-moment activity of many interacting cell types throughout the body. Physiology seeks to elucidate these cellular interactions that span organs, cell types and timescales, but has been limited by the inability to record this time-varying cellular activity simultaneously throughout the entire body.
By Virginie M. S. Ruetten, Wei Zheng, Igor Siwanowicz, Brett D Mensh, Mark Eddison, Amy Hu, Andrew L. Lemire, Caiying Guo, Mykola Kadobianskyi, Yisheng He, Kari C. Close, Gudrun Ihrke, Aparna Dev, Alyson Petruncio, Yinan Wan, Rongwei Zhang, Mark Fishman, Florian Engert, Benjamin Judkewitz, Mikail Rubinov, Philipp Keller, Chie Satou, Guoqiang Yu, Paul Tillberg, Maneesh Sahani, Misha B. Ahrens, Yunfeng Chi, Marc Renz, Sara Lelek-Greskovic
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Nature
Verified
Whole-brain, all-optical interrogation of neuronal dynamics underlying gut and vascular interoception in zebrafish
Abstract To select behaviors appropriate to their circumstances and needs, animals integrate information about the external environment with information about the state of their bodies, derived from sensing and processing internal signals (interoception).
Predator robots help researchers uncover how larval zebrafish rapidly learn
A novel system developed by Janelia researchers that chases larval zebrafish around an arena with predator robots is enabling scientists to understand how these days-old fish quickly learn in the real world. Larval zebrafish are an invaluable tool for neuroscientists, who use the tiny, transparent fish to probe how the brain controls behavior, but it’s been difficult for scientists to study learning in these developing vertebrates – an important part of understanding how the brain works.
"Biomechanical Origins of Proprioceptor Feature Selectivity and Topogra" by Akira Mamiya, Anne Sustar et al.
Keywords Animals, Drosophila, Sensory Receptor Cells, Proprioception, Drosophila Proteins, Ion Channels Abstract Our ability to sense and move our bodies relies on proprioceptors, sensory neurons that detect mechanical forces within the body. Different subtypes of proprioceptors detect different kinematic features, such as joint position, movement, and vibration, but the mechanisms that underlie proprioceptor feature selectivity remain poorly understood.
Days-old zebrafish rapidly learn to recognize threatening agents through noradrenergic and forebrain circuits
Keywords learning larval zebrafish ethological behavior whole-brain calcium imaging noradrenergic signaling fear conditioning robotic behavioral assay neuromodulation fear states Introduction Survival in challenging environments requires recognizing and avoiding predators.
Whole-body simulation of realistic fruit fly locomotion with deep reinforcement learning
Abstract The body of an animal influences how the nervous system produces behavior. Therefore, detailed modeling of the neural control of sensorimotor behavior requires a detailed model of the body. Here we contribute an anatomically-detailed biomechanical whole-body model of the fruit fly Drosophila melanogaster in the MuJoCo physics engine. Our model is general-purpose, enabling the simulation of diverse fly behaviors, both on land and in the air.
Microscopic photo competition celebrates beauty of the tiny world
An annual photography competition, celebrating scientific microscopic images, has unveiled this year’s winners. A startling cross-section shot of a flower has been awarded the fifth annual Evident Image of the Year Award, leading a mesmerizing gallery of miniature marvels. Previously known as the Image of the Year European Life Science Light Microscopy Award, the competition is designed to celebrate the beauty and scientific value of the tiny world all around us.
Wireless recordings from dragonfly target detecting neurons during prey interception flight
Abstract Target interception is a complex sensorimotor behavior which requires fine tuning of the sensory system and its strategic coordination with the motor system. Despite various theories about how interception is achieved, its neural implementation remains unknown. We have previously shown that hunting dragonflies employ a balance of reactive and predictive control to intercept prey, using sophisticated model driven predictions to account for expected prey and self-motion.
Mechanosensory representation of wing deformations
Abstract Efficient representation of structural deformations is crucial for monitoring the instantaneous state of biological structures. Insects' ability to encode wing deformations during flight demonstrates a general morphological computing principle applicable across sensory systems in nature as well as engineered systems. To characterize how relevant features are encoded, we measured and modelled displacement and strain across dragonfly wing surfaces in tethered and free flight.
Artificial intelligence brings a virtual fly to life
By infusing a virtual fruit fly with artificial intelligence, Janelia and Google DeepMind scientists have created a computerized insect that can walk and fly just like the real thing. The new virtual fly is the most realistic simulation of a fruit fly created to date. It combines a new anatomically accurate model of the fly’s outer skeleton, a fast physics simulator, and an artificial neural network trained on fly behaviors to mimic the actions of a real fly.
Biomechanical origins of proprioceptor feature selectivity and topographic maps in the Drosophila leg
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Fruit flies found to move their retinas, instead of moving their eyes
Fruit flies differ from us in a great many ways, including the fact that they can't move their eyes relative to the rest of their head. That's not a problem, however, as new research shows that they move their retinas within their unmoving eyes instead. Fruit flies actually aren't the first animals known to utilize the retina-moving strategy. Spiders had already been observed doing so, which led The Rockefeller University's Lisa Fenk and Assoc. Prof. Gaby Maimon to wonder about the flies.
Systematic characterization of wing mechanosensors that monitor airflow and wing deformations
Highlights • Dragonfly wings are innervated by an extensive collection of sensory neurons. • Mechanosensors are spread across the whole span of the wing with consistent patterns. • The axons of wing sensory neurons are scaled to compensate for transmission latencies. • Anatomically accurate models reveal wing strain fields that inform sensor distribution. Summary Animal wings deform during flight in ways that can enhance lift, facilitate flight control, and mitigate damage.
A novel family of secreted insect proteins linked to plant gall development
(Current Biology 31, 1836–1849.e1–e12; May 10, 2021) In the published version of this article, an error was identified in Figure 3A. In the original figure, the salivary gland data for G1 and G2 nymphal stage 1 were plotted as raw read counts, rather than counts per million reads. The corrected figure shows these values as counts per million reads in the online version of the paper.
A novel family of secreted insect proteins linked to plant gall development
Highlights • Novel aphid bicycle genes contribute to plant gall development • Variation in a bicycle gene alters plant gene expression and a gall phenotype • bicycle genes encode a large family of diverse, secreted, cysteine-rich proteins • Many bicycle genes have experienced repeated diversifying selection Summary In an elaborate form of inter-species exploitation, many insects hijack plant development to induce novel plant organs called galls that provide the insect with a source of...
A Neural Circuit Encoding the Experience of Copulation in Female Drosophila
Highlights • Mating non-ejaculatory males induce a copulation effect reducing female receptivity • Activity of LSAN neurons is necessary and sufficient for copulation effect • Neurons expressing mechanosensory channel Piezo relay copulation effect to LSANs • Neurons expressing MIP mediate copulation effect downstream of LSANs Summary Female behavior changes profoundly after mating.
Amazing tiny things
A microscopic image of a fish face by Oscar Ruiz took first prize in the 42nd Annual Nikon Small World Photomicrography Competition in 2016. The contest comprised fascinating submissions from 70 countries submitted by scientists, photographers as well as hobbyists. Ruiz, who works at The University of Texas MD Anderson Cancer Center in Houston, took the winning image as part of his research on the facial development of a four-day-old zebrafish embryo.
Buzzworthy photo: Nikon contest winner captures bee's eye
Nikon announced the winners Wednesday for the annual photomicrography contest, supporting a relationship between scientific research and artistic value. Why Joe Biden is smart to sit out first Democratic debate (+video) Uber teams up with Amber Alert: Can drivers help bring missing kids home? Australian Ralph Grimm won 1st place in Nikon's Small World photo contest for his image of a bee's eye.
Nikon Small World 2015 winner: Incredible close-up image of pollen grains on a bee's eye [Photos]
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An incredible close-up image of dandelion pollen grains on a honey bee's eye has won the Nikon Small World 2015 photomicography competition. Ralph Grimm, an Australian high-school teacher and self-taught photomicrographer, says that as a former beekeeper, the subject matter is near and dear to his heart.
By Matt Adams Verified, Daniel Miller Verified, David Sim, Tomoko Yamazaki, Justin L. Sonnenburg, Ian Gardiner, Viktor Sykora, Ralph Claus Grimm, Kristen Earle, Gabriel Billings, KC Huang, Igor Siwanowicz, Ethan S Sokol, Giorgio Seano, Henri Koskinen, Evan Darling, Nathanael Prunet, Rogelio Moreno Gill, Hannah Sheppard-Brennand, Jose Almodovar, Heiti Paves, Charles B Krebs, David Maitland, Roland Gross, Frank Reiser
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International Business Times (U.K.)
Verified
Buzzworthy photos: Contest winners bring microscopic beauty to the masses
Nikon announced the winners Wednesday for the annual photomicrography contest, supporting a relationship between scientific research and artistic value. Buoyed by Russia and Iran, Syria seeks to reclaim ground. But then what? Australian Ralph Grimm won 1st place in Nikon's Small World photo contest for his image of a bee's eye.
Buzzworthy photo: Small World contest winner captures bee's eye
Nikon announced the winners Wednesday for the annual photomicrography contest, supporting a relationship between scientific research and artistic value. Hillary Clinton won the 'after debate,' and that's what matters (+video) Should Jim Webb be included in next GOP debate? Australian Ralph Grimm won 1st place in Nikon's Small World photo contest for his image of a bee's eye.
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