体動に伴なう視覚障害

Jumbling of objects (Dandy's symptom) について

抄録

Three cases of jumbling of objects are reported herein. These patients had difficulty with vision during head and/or body movement. However, they had no trouble if they looked straight ahead or if they sat still, and with their eyes closed, they were less unsteady and almost normal. Examination disclosed a Mann's sign and unsteady gait with eyes open. Neurotological examinations of these patients showed bilateral loss of hearing and vestibular function. Close inspection of eyes during the head movements revealed no gross nystagmus, but there were irregularities in the relative movements of the eyes as detected by the electronystagmography. When the eyes moved while the head was held still, the ocular excursions appeared smooth; when the eyes were fixed on a target and the head was moved, the relative displacement of the eyes showed irregularities.
In bilateral vestibular disease, jumbling of objects might occur only during movements of either body or head, or of both together.