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Targeted Illumination with Polygon1000

Flexible Imaging for Multiple Species and Modalities


In order to conduct large FOV targeted optogenetics, Moravec and Williams used the OASIS Macro combined with the Polygon system to stimulate the peroneal nerve in small segments starting from the distal muscle insertion moving proximally towards the sciatic nerve in a rat expressing Channelrhodopsin-2 (ChR2) in the peroneal nerve after an intramuscular virus injection in the Tibialis Anterior (TA) muscle.

At the same time, they recorded muscle response to the optical stimulation in the TA muscle with intramuscular electromyography (EMG). This experiment characterized the strength of opsin expression and muscle responses along the length of the nerve at any given time point, which they found to be highly variable after virus injection. The OASIS Macro + Polygon system also allows spatial patterning of opsin expression along the nerve, both along its length as well as its width. This will serve to elucidate how opsin expression varies spatially in the nerve and how to activate specific muscle and nerve fibers.
Dr. Emma Moravec is a Biomedical Engineering PhD student in the Neural Engineering with a Doctorate of Philosophy, Interfacing, Modulation, and Optimization (NEIMO) Lab within the Joint Department of Biomedical Engineering at Marquette University and the Medical College of Wisconsin, under the supervision of Dr. Jordan Williams. Her research is conducted within the Neural Engineering & Modulation Laboratory, where she contributes to studies spanning neurophysiology and muscle physiology, optical and electrical stimulation, viral injection techniques, imaging, histology, and device fabrication. Her work supports ongoing investigations in neural prosthetics and viral gene therapy, with a focus on developing and applying advanced engineering tools to modulate and study neural systems.
Dr. Jordan J. Williams is an Assistant Professor in the Joint Department of Biomedical Engineering and Director of the Neural Engineering & Modulation Laboratory (NEMo Lab). He completed his postdoctoral training at the Systems Neuroscience Institute at the University of Pittsburgh and earned his M.D. from Washington University in St. Louis. His research focuses on peripheral optogenetics for motor stimulation, brain–machine interfaces and neural prosthetics, viral gene therapy approaches for spinal cord injury and disease, and the neural correlates of motor learning, with the goal of developing innovative technologies to restore and modulate motor function.

“The OASIS Macro combined with the Polygon system enabled us to perform large field-of-view, spatially precise optogenetic stimulation along the length of the peroneal nerve. By targeting small nerve segments while simultaneously recording intramuscular EMG, we were able to characterize variability in opsin expression and muscle response with a level of spatial control that would not have been possible with conventional approaches.”
— Dr. Emma Moravec, Biomedical Engineer at Marquette University
“What stood out with the OASIS Macro was its ability to deliver patterned, high-power illumination across a wide field while maintaining fine spatial resolution. This allowed us to map opsin expression both longitudinally and transversely along the nerve and selectively activate specific muscle and nerve fibers. The system has become a key tool for studying peripheral optogenetics and neuromuscular control.”
— Dr. Jordan J. Williams, Director of the Neural Engineering & Modulation Laboratory
We provide comprehensive remote and in-person support throughout every stage of your experiment. From initial system installation and configuration to advanced experimental workflows, our technical and applications teams work closely with you to ensure reliable performance and smooth integration into your lab environment. Support is available for troubleshooting, optimization, and experimental planning, with responsive follow-ups to keep your research moving forward. Leveraging our global distributor network, we ensure consistent, high-quality support for users worldwide.

Our training programs are designed to help users quickly gain confidence and proficiency with both hardware and software. We offer detailed instruction on system setup, operation, and maintenance, as well as guidance on experimental workflows and best practices. For applications that require it, we also provide training on surgical procedures and preparation techniques relevant to optical imaging and optogenetics. Training can be delivered remotely or on-site, depending on your needs, and is tailored to the experience level and research goals of your team.

We maintain a robust online resource library to support your research beyond direct technical assistance. These resources include application notes, e-books, recorded webinars, tutorials, and references to relevant peer-reviewed publications. Designed to support both new and experienced users, our materials provide practical guidance, troubleshooting tips, and real-world examples to help you refine experimental design, improve data quality, and stay informed about emerging techniques.
We provide comprehensive remote and in-person support throughout every stage of your experiment. From initial system installation and configuration to advanced experimental workflows, our technical and applications teams work closely with you to ensure reliable performance and smooth integration into your lab environment. Support is available for troubleshooting, optimization, and experimental planning, with responsive follow-ups to keep your research moving forward. Leveraging our global distributor network, we ensure consistent, high-quality support for users worldwide.
