Just below point where symptoms are elicited in the leg being lifted, slightly flex the patient's knee and push fingers into popliteal fossa
Positive: reproduction of symptoms in leg being lifted
References
Baxter S, ed., McScheffrey G, ed. Toronto Notes: Comprehensive Medical Reference & Review for MCCQE 1 & USMLE 2. 26th ed. Toronto: Toronto Notes for Medical Students Inc; 2010.
Hurley K. OSCE and Clinical Skills Handbook. Halifax: Elsevier Canada; 2005.