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An Easily Compatible Eye-tracking System for Freely-moving Small Animals

Neuroscience Bulletin 2022年第6期38卷 661-676页

作者： Kang Huang Qin Yang Yaning Han Yulin Zhang Zhiyi Wang Liping Wang Pengfei Wei Shenzhen Key Lab of Neuropsychiatric Modulation and Collaborative Innovation Center for Brain Science Guang-dong Provincial Key Laboratory of Brain Connectome and BehaviorCAS Center for Excellence in Brain Science and Intelligence TechnologyBrain Cognition and Brain Disease InstituteShenzhen-Hong Kong Institute of Brain Science-Shenzhen Fundamental Research InstitutionsShenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China University of Chinese Academy of Seiences Bejing 100049China Harbin Institute of Technology Shenzhen Shenzhen 518055.China

Measuring eye movement is a fundamental approach in cognitive science as it provides a variety of insightful parameters that reflect brain states such as visual attention and *** eye-tracking with multimodal neural recordings or manipulation techniques is beneficial for understanding the neural substrates of cognitive *** commercially-available and custom-built systems have been widely applied to awake,head-fixed small ***,the existing eyetracking systems used in freely-moving animals are still limited in terms of their compatibility with other devices and of the algorithm used to detect eye ***,we report a novel system that integrates a general-purpose,easily compatible eye-tracking hardware with a robust eye feature-detection *** ultra-light hardware and a detachable design,the system allows for more implants to be added to the animal's exposed head and has a precise synchronization module to coordinate with other neural ***,we systematically compared the performance of existing commonly-used pupil-detection approaches,and demonstrated that the proposed adaptive pupil feature-detection algorithm allows the analysis of more complex and dynamic eye-tracking data in freemoving *** eye-tracking and electroencephalogram recordings,as well as algorithm validation under five noise conditions,suggested that our system is flexibly adaptable and can be combined with a wide range of neural manipulation and recording technologies.

关键词： Eye-tracking Freely-moving head-mounted device Pupil detection Adaptive Kalman filter

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