Geste antagoniste
The paper by Broussolle, et al features many vintage photographs from papers written around the turn of the 20th century.(5) Authors from that era argued that a geste antagoniste proved cervical dystonia was psychogenic. It seemed too bizarre to be real. Decades passed before others pointed out the error of this thinking. In a complete reversal, the presence of a geste antagoniste is now seen as evidence for rather than against organicity.
For video of a geste antagoniste in oromandibular dystonia see http://www.youtube.com/watch?v=b9roso9B1F0.
Video legend. The geste antagoniste (sensory trick, counterpressure sign, proprioceptive trick) is a maneuver done by patients to control dystonic movements and postures. For instance, patients with cervical dystonia may learn they can straighten their head by placing a hand or finger somewhere on the face, chin or back of the head or performing some other maneuver to provide sensory stimulation or light counterpressure.
References
1. Poisson, A, Krack, P, Thobois, S, et al. History of the 'geste antagoniste' sign in cervical dystonia. J Neurol. 2012; 259:1580-1584.
2. Campbell WW. Barohn RJ. DeJong's the neurologic examination, 8th ed. Philadelphia: Wolters Kluwer, 2020.
3. Campbell WW. Clinical signs in neurology: a compendium. Philadelphia: Wolters Kluwer Health, 2016.
4. Müller J, Wissel J, Masuhr F, Ebersbach G. Clinical characteristics of the geste antagoniste in cervical dystonia. J Neurol. 2001 Jun;248(6):478-82. doi: 10.1007/s004150170156. PMID: 11499637.
5. Broussolle E, Laurencin C, Bernard E, et al. Early Illustrations of Geste Antagoniste in Cervical and Generalized Dystonia. Tremor Other Hyperkinet Mov (N Y). 2015 Sep 21;5:332. doi: 10.7916/D8KD1X74. PMID: 26417535; PMCID: PMC4582593.