Trouble de L'Orientation Visuelle Dans Les Trois Dimensions de L'Espace

Optic ataxia: clinical radiological correlations with the EMI scan

“…His behaviour, though more erratic, resembles that of subjects whose vision is distorted by a prism. His con-dition is similar to the optic ataxia or visual disorientation described by other authors (Balint, 1909;Holmes, 1918;Michel et al, 1965); although the present patient showed neither abnormalities of extraocular movements nor visual inattention, prominent factors in Balint's syndrome and in Holmes' 'disturbance of visual orientation'. Instances of impairment of visually guided movement within a single visual field contralateral to the lesion have been reported in four cases of left (Riddoch, 1935;Stenvers, 1961) and four cases of right parietal-occipital lesions (Stenvers, 1961;Rondot and de Recondo, 1974). All eight patients had difficulty in pointing and judging distance within the impaired field and, more importantly, at least four of them had no disturbance of eye movements, hemianopia, or visual inattention.…”

“…As originally described by Balint (1909), it is usually seen in the context of severe oculomotor impairment. A similar disorder, also associated with gross oculomotor disturbances has been described under the name of visual disorientation (Holmes, 1918;Michel et al, 1965). A few cases, however, have been reported with normal extraocular -movements and optic ataxia confined to a single visual field (Riddoch, 1935;Stenvers, 1961;Rondot and de Recondo, 1974).…”

Optic ataxia: clinical-radiological correlations with the EMIscan.

“…His behaviour, though more erratic, resembles that of subjects whose vision is distorted by a prism. His con-dition is similar to the optic ataxia or visual disorientation described by other authors (Balint, 1909;Holmes, 1918;Michel et al, 1965); although the present patient showed neither abnormalities of extraocular movements nor visual inattention, prominent factors in Balint's syndrome and in Holmes' 'disturbance of visual orientation'.…”

“…As originally described by Balint (1909), it is usually seen in the context of severe oculomotor impairment. A similar disorder, also associated with gross oculomotor disturbances has been described under the name of visual disorientation (Holmes, 1918;Michel et al, 1965). A few cases, however, have been reported with normal extraocular -movements and optic ataxia confined to a single visual field (Riddoch, 1935;Stenvers, 1961;Rondot and de Recondo, 1974).…”

Reading Disturbances in the Presence of Oculomotor Disorders

“…M ichel et al [27,28] described a patient presenting at the beginning of his illness with spasmodic fixation, who afterwards developed an ocu lomotor disorder which could be considered as a failure of fixation. His reading disturbance, in fact, corresponded much more closely to this lat ter type of disturbance.…”