Wartenberg Thumb Reflex Forceful flexion of the fingers at the distal IP joints produces (Adduction, flexion, and opposition of the thumb) INSTEAD of a normal response of abduction and extension. This is a manifestation of a corticospinal tract lesion and has been called the upper extremity equivalent of Babinski’s plantar sign. This is distinct from unrelated Wartenberg sign in ulnar neuropathy. Dr. Boby Varkey Maramattom @bobvarkey #Wartenberg #Thumb #Reflex #Adduction #Sign #clinical #video #hand #neurology #physicalexam #pyramidal
