Periodic firing evolution of a Hindmarsh–Rose neuron model and FPGA circuit implementation Yan Liu, Yingjie Shen, Haowei Zhang and Zhihui Li Eur. Phys. J. Plus, 139 3 (2024) 235 Published online: 11 March 2024 DOI: 10.1140/epjp/s13360-024-05046-w