Negro’s Sign

Negro’s Sign

Negro has two eponymous signs:

  1. Cogwheel (jerky) type of rigidity in basal ganglia disorders.
  2. In both peripheral and central facial paralysis, the eyeball deviates outward and elevates more than normal when the patient attempts to look up due to overaction of the inferior oblique and superior rectus muscles, respectively.


Cross References

Bell’s palsy; Facial paresis; Parkinsonism; Rigidity