Researchers at Cornell University have embarked on an intriguing venture with the development of ‘MouseGoggles,’ a tiny virtual reality headset equipped with eye-tracking designed specifically for mice. This innovation plays a pivotal role in exploring complex behaviors while conducting neural recordings.
Traditional VR systems for small animals often falter due to constraints in size, immersion, and advanced functionalities like eye-tracking. However, MouseGoggles, which recently became the focus of a published study, aims to overcome these limitations. The researchers at Cornell sought to delve deeper into the intricacies of the mouse brain, which has been a cornerstone for behavioral and neurological research.
To validate their study, the researchers tracked neural activity within the visual cortex, proving that images were not only presented clearly but also effectively. They discovered that this VR headset created a truly immersive experience, visible through hippocampal recordings, and tests involving reward-based learning, as well as fear responses to virtual looming stimuli.
This groundbreaking project was spearheaded by Chris Schaffer, a professor of biomedical engineering at Cornell Engineering, alongside Ian Ellwood, an assistant professor in neurobiology and behavior at the College of Arts and Sciences. Their mission extends beyond their study; they aim to encourage a broader adoption of VR methodologies within neuroscience research.
“It’s a rare opportunity,” remarked postdoctoral researcher Matthew Isaacson to the Cornell Chronicle, “to design tools that not only surpass existing technology in experimental power but are also simpler and more cost-effective to produce. This innovation increases experimental capacity in neuroscience and opens up the technology to many more labs.”
Particularly notable is MouseGoggles’ construction from inexpensive, readily available components, employing smartwatch displays and miniature lenses to form a compact system. The mini VR headset leveraged popular tools such as the Godot game engine and a Raspberry Pi 4, ingeniously fitted with a split-screen display driver.
The implications of their work might spark interest in developing lightweight, standalone headsets for larger rodents like tree shrews and rats. Currently, MouseGoggles provide a fixed-head experience, simulating movement with a ball-shaped treadmill. The team also envisions integrating sensory features such as taste and smell, further enhancing the immersive quality of the VR environment.
“I believe five-sense virtual reality for mice holds promise for experiments aiming to decipher complex behaviors where mice must integrate sensory information,” Schaffer explained to the Cornell Chronicle. “It’s about comparing opportunities with their internal motivations, needs like rest and food, and making decisions on how to act.”
