HumanHandPoseObservation.JointName.thumbMP A joint name that represents the thumb’s metacarpophalangeal (MP) joint. Declarationcase thumbMP See AlsoGetting the thumb finger joint nameHumanHandPoseObservation.JointName.thumbCMCHumanHandPoseObservation.JointName.thumbIPHumanHandPoseObservation.JointName.thumbTip