Forced smile

[image error]Neurology journal Brain had a wide-ranging review of the book 'Insomnia: A Cultural History' last year which has this wonderful part about Darwin, Duchenne and how he electrocuted the face to study emotional expression.

In the same era and acting on the same beliefs, many experiments were done to study the effect of electricity on sleep and on the nervous system. Beard and Rockwell (1871) claimed that the tendency to insomnia could be removed by electricity, thus galvanizing and causing...