円運動視標追跡検査(Circular Eye Tracking Test;CETT) : 2.中枢疾患55例にもとづく検索結果から

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In the preceding paper, the authors presented the Circular Eye-Tracking Test as one of new approaches in vestibular examination. This test was performed by an apparatus in which the visual stimulus moved drawing a circle clock-wise at 120°/sec with the radius of 25. 5cm. The apparatus was set 70cm before the patient, whose eye movements pursuing a visual stimulus were recorded by ENG. With an accumulation of our experiments, the authors could reaffirm two good advantages of the Circular Eye-Tracking Test; simultaneous recording of the horizontal and vertical components of eye movement pursuing a visual stimulus, and decrease of the artifacts by the movement of upper eyelids which often appeared in the vertical eye-tracking test. In this study, 55 cases with central disorders were examined by the Circular Eye-Tracking Test and 23 cases showed abnormal eye movement. We classified them into three groups as follows: i) abnormalities found mainly in the horizontal component (6 cases of congenital nystagmus and 1 case of post traumatic normal pressure hydrocephalus). ii) abnormalities found mainly in the vertical component (6 cases including: basilar impression+ Arnold Chiaris malformation+ platybasia+ scoliosis, and Wernickes encephalitis). iii) abnormalities found both in the horizontal and vertical components (10 cases including plt- tybasia+ Arnold Chiaris malformation+ basilar impression+ syringobulbia, and late cerebellar cortical atrophy), In any of these three groups, the central spontaneous nystagmus was always superimposed on the pursuit movement in the Circular Eye-Tracking Test. The data presented here are not sufficient to affirm that the abnormalities of the horizontal and vertical components in the Circular Eye-Tracking Test are directly related to the lesions at the locations controlling horizontal and vertical eye movements respectively. But it should be noted that in not a few of these cases we found coincidence between the physiopathological lesions and abnormalities recorded by the Circular Eye-Tracking Test
社団法人日本耳鼻咽喉科学会の論文

円運動視標追跡検査(Circular Eye Tracking Test;CETT) : 2.中枢疾患55例にもとづく検索結果から

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