[2]　只有当大脑感受到疼痛时，疼痛才出现：Interview with Professor Irene Tracey, John Radcliffe Hospital, Oxford, 18 Sept. 2018.
[3]　第一个确认痛觉感受器：Oxford Dictionary of National Biography, s.v. ‘Sherrington, Sir Charles Scott?; Nature Neuroscience, June 2010, pp. 429-430.
[4] 一半的脊髓损伤：Annals of Medicine, New Yorker, 25 Jan. 2016.
[5]　就像神经系统本身一样，疼痛：‘A Name for Their Pain', Nature, 14 July 2016; Foreman, Nation in Pain, pp. 22-24.
[6]　这个词是法语demi-craine的变体：‘Headache', American Journal of Medicine, Jan. 2018; ‘Why Migraines Strike', Scienti?c American, Aug. 2008; ‘A General Feeling of Disorder', New York Review of Books, 23 April 2015.