The stationary arm of a goniometer is placed lateral midline…

The stationary arm of a goniometer is placed lateral midline of the ulna using the olceranon and ulnar styloid process, the fulcrum is lateral aspect of the wrist over the triquetrum and the movable arm lateral midline of the 5th metacarpal as reference. What motion is MOST LIKELY being measured? (Slide 54)