Deyerle’s Sign indicates nerve root compression, inter-ventricular foramen encroachment by traction on the sciatic nerve and eliciting radiculopathy/leg pain.


Patient seated, examiner extends the knee until symptoms are exacerbated, then slightly flexes the knee while applying pressure over the popliteal fossa (traction on the sciatic nerve).


Leg pain Radiculopathy, interventricular foramen encroachment, space-occupying lesion, nerve root tension, sciatica
Local back or hamstring pain Sprain/strain

Clinical Notes

Traction of the sciatic nerve increases tension resulting in radicular symptoms in the presence of nerve compression.