The ability to fix the eyes on a target, visual fixation, is important for the maintenance of equilibrium. The @entity227 ( @entity227 ) test is one method of measuring the function of visual fixation. The test records @entity346 by electrooculography, and the maximum slow phase velocity of @entity346 in @entity400 is compared with the slow phase velocity in light with eyes fixed. Lesions of the cerebellum, brain stem, and cerebrum cause abnormalities of @entity227 . We report a @entity1 whose @entity227 became a clue in the diagnosis of a @entity6220 . A 54-year-old @entity1 complained of @entity1296 , which gradually increased in frequency over 5 months. He visited several clinics, where @entity394 and @entity4720 were suspected and treated without improvement. Although a pure-tone auditory test revealed bilateral normal hearing, a caloric test showed a weak response and @entity227 was lost with augmentation of @entity346 in light on both sides. Both eye tracking and optokinetic nystagmus tests were abnormal. Although magnetic resonance imaging showed no abnormalities, single photon emission computed tomography revealed @entity551 in the parietal area. @entity227 of @entity346 towards the side of a lesion is reduced or abolished after unilateral flocculus damage, and is abolished bilaterally after bilateral flocculus damage. In the case of a parietal lobe or pontine lesion, @entity227 is strongly abolished, and even augmentation of @entity346 may be observed. In the present case, the @entity1 was diagnosed with multiple-system @entity194 after onset of @entity1296 .

[A @entity1 with Early-Stage Multiple System Atrophy Showing XXXX in Light].

@entity1 :: ('9606', 'Species') :: ['patient', 'man'] @entity227 :: ('MESH:D014786', 'Disease') :: ['VS', 'visual suppression'] @entity6220 :: ('MESH:D020279', 'Disease') :: ['disorder of the central nervous system'] @entity394 :: ('MESH:D015837', 'Disease') :: ['vestibular neutritis'] @entity551 :: ('MESH:D007022', 'Disease') :: ['decreased blood flow'] @entity400 :: ('MESH:D014202', 'Disease') :: ['darkness'] @entity194 :: ('MESH:D001284', 'Disease') :: ['atrophy'] @entity1296 :: ('MESH:D004244', 'Disease') :: ['dizziness'] @entity346 :: ('MESH:D009759', 'Disease') :: ['caloric nystagmus'] @entity4720 :: ('MESH:D055009', 'Disease') :: ['cervical spondylosis']
@entity346 :: (MESH:D009759,Disease) :: ['Augmented Nystagmus']
