retropulsion

/ (ˌrɛtrəʊˈpʌlʃən) /

noun

med an abnormal tendency to walk backwards: a symptom of Parkinson's disease

Medical definitions for retropulsion

retropulsion
[ rĕt′rō-pŭlshən ]

n.

An involuntary backward walking or running, as seen in Parkinsonism.
A pushing back of a part or organ.