No specific articles found. Maybe this

is of some interest. Are you sure you've asked

in the right newsgroups?

http://onlinelibrary.wiley.com/doi/10.1111/jnp.12033/full

https://www.eurekalert.org/pub_releases/2011-03/cp-tba031811.php

https://www.eurekalert.org/pub_releases/2007-07/gumc-rcw071207.php

http://medicalxpress.com/news/2014-04-brain-tics-tourette-syndrome.html

http://www.scienceagogo.com/news/20070613215707data_trunc_sys.shtml

https://idw-online.de/de/news659195

http://phys.org/news/2007-12-therapy-tics-tourette-syndrome.html

Regards,

Joachim

Thanks for the useful links Mr Joachim. However, none of those hints the retropulsion symptom.

I really remember tagging this as {Neurological Gait Disorders, Gait, Tourette Syndrome}. It is a bit odd how the tags were changed to something totally different.