31. Frerichs performed pioneer research of multiple sclerosis, and described nystagmus as a symptom of the disease. 32. Hansen has Asperger syndrome and nystagmus , conditions that have presented him with challenges in social situations. 33. Also, many blind people have nystagmus , which is one reason that some wear dark glasses. 34. This creates involuntary abrupt eye movements ( nystagmus ) as the brain attempts to track the moving stripes. 35. A positive test is indicated by patient report of a reproduction of vertigo and clinician observation of nystagmus . 36. Neurological symptoms may include, among others, dysarthria, truncal, limb and gait ataxia and nystagmus . 37. Pathological nystagmus generally causes a degree of vision impairment, although the severity of such impairment varies widely. 38. The disorder can be tested for using a nystagmus test, such as the Dix-Hallpike maneuver. 39. Then the examiner quickly rotates the head 90?to the left side, and checks for vertigo and nystagmus . 40. The horizontal gaze nystagmus test has been highly criticized and major errors in the testing methodology and analysis found.
