International Joint Laboratory (SYSU-PolyU HK) of Novel Anti-Dementia Drugs of Guangdong 1 article published in JoVE Neuroscience Assessment of Neuronal Viability Using Fluorescein Diacetate-Propidium Iodide Double Staining in Cerebellar Granule Neuron Culture Lin Jiajia*1, Mak Shinghung*2, Zheng Jiacheng1, Wang Jialing1, Xu Dilin1, Hu Shengquan2, Zhang Zaijun3, Wang Qinwen1, Han Yifan2,4, Cui Wei1,2 1Ningbo Key Laboratory of Behavioral Neuroscience, Zhejiang Provincial Key Laboratory of Pathophysiology, School of Medicine, Ningbo University, 2Department of Applied Biology and Chemistry Technology, Institute of Modern Chinese Medicine, The Hong Kong Polytechnic University, 3Institute of New Drug Research, Guangdong Provincial Key Laboratory of Pharmacodynamic, Constituents of Traditional Chinese Medicine & New Drug Research, College of Pharmacy, Jinan University, 4International Joint Laboratory (SYSU-PolyU HK) of Novel Anti-Dementia Drugs of Guangdong This protocol describes how to accurately measure neuronal viability using Fluorescein diacetate (FDA) and Propidium Iodide (PI) double staining in cultured cerebellar granule neurons, a primary neuronal culture used as an in vitro model in neuroscience and neuropharmacology research.