1. Zhao Y, Feng G, Gao Z. Advances in diagnosis and non-surgical treatment of Bell’s palsy. The Journal of Otolaryngology. 2015;10(1):7-12
2. Shelley BP. Historical perspectives of facial palsy: Before and after Sir Charles Bell to facial emotional expression. Archives of Medical Health Science. 2013;1:85-88
3. Privatdozentin BW, Rodden FA, Rapp A, Erb M, Grodd W, Ruch W. Humor and smiling: Cortical regions selective for cognitive, affective, and volitional components. Neurology. 2006;66:887-889
4. Gowers WR. A Manual of Diseases of the Nervous System, Vol. 2: Diseases of the Brain and Cranial Nerves; General and Functional Diseases of the Nervous System. London (UK): Forgotten Books; 2019
5. Hopf HC, Muller-Forell W, Hopf NJ. Localization of emotional and volitional facial paresis. Neurology. 1992;42:1918-1923