Thumb Ulnar Collateral Ligament Stress Test Ulnar collateral ligament testing of the thumb is performed to evaluate for instability found on a gamekeeper's or skier's thumb. After stabilizing the first metacarpal, a valgus stress is applied to the thumb at the metacarpophalangeal joint. Laxity indicates a partial or complete ulnar collateral ligament tear. Video via @open_michigan #Thumb #Ulnar #Collateral #Ligament #Stress #Test #Finger #Hand #PhysicalExam #clinical #video #sports #msk #orthopedics
