"Rocket Sign"

"Rocket Sign"

The so-called "rocket sign" is a toppling backward, after jumping to the feet from the sitting position, due to postural instability, seen in progressive supranuclear palsy (PSP) and ascribed to frontal lobe dysfunction. A history of falls due to postural instability in the first year after disease onset is one of the mandatory inclusion criteria for the diagnosis of PSP.

Cross References

Parkinsonism; "Wheelchair sign"