Pronator Drift Testing for Stroke Subtle extensor weakness - Sign of Upper motor neuron lesion In detecting CT/MRI abnormality in patient with normal exam: • Sensitivity 92%, Specificity 90% • LR+ 9.2, LR- 0.09 Best test characteristics when performed for 45 seconds - BWH Medicine Chiefs @BrighamChiefs #Pronator #Drift #Testing #Stroke #physicalexam #diagnosis #neurology #cva