title: Saccades with limited downward gaze.
abstract: Fourteen patients with monocular limitation of downward gaze had vertical saccadic velocity measurements. Patients with orbital floor fracture and endocrine ophthalmopathy were excluded from the group. In four cases (29%), the difference between upward downward saccadic velocities was 20% or less. These patients were not thought to have any evidence of inferior rectus muscle paresis. In ten cases (71%), the difference between upward and downward saccades varied between 46% to 275% (average, 115%), upward saccades being more rapid in each case. These cases were all believed to have moderate to great inferior rectus muscle palsy. In one subject with a lidocaine hydrochloride-induced inferior rectus muscle palsy, upward saccades were 135% faster than downward saccades. These findings were compared with those in patients with monocular limitation of elevation, and the surgical management was reviewed.
mesh_terms: D004585:Electrooculography; D005133:Eye Movements / Q000187:drug effects; D006801:Humans; D008012:Lidocaine / Q000494:pharmacology; D009801:Oculomotor Muscles / Q000187:drug effects / Q000503:physiopathology; D009886:Ophthalmoplegia / Q000503:physiopathology* / Q000601:surgery; D012438:Saccades / Q000187:drug effects
chemical_list: D008012:Lidocaine