منابع مشابه
Congenital hereditary vertical nystagmus.
Duke-Elder (1949) states that congenital nystagmus varies considerably in extent, direction, and rapidity of the movements. In most cases it affects both eyes equally, but in a few instances it is uniocular. Typically the movements are pendular in type, horizontal in direction, and do not alter on lateral deviation, although they may then become jerky in type. Sometimes the movement is coarser ...
متن کاملHereditary Congenital Nystagmus
Three members of the same family with hereditary congenital nystagmus (eN) were studied. Nystagmus amplitude, fre quency, and Intensity functions deter mined the gaze angle with least nys tagmus. Visual acuity was increased in all cases by the use of version or composite prisms. In both pendular and jerk forms of eN, the fovea oscillated on alternate sides of the fixation spot and exhibited ...
متن کاملCongenital nystagmus
Key-words Disease name Definition/Diagnosis criteria Differential diagnosis Pathophysiology Clinical description Paraclinic testing and diagnosis Frequency Treatment Reference
متن کاملStudy of congenital nystagmus: optokinetic nystagmus.
A severe defect of optokinetic nystagmus (OKN) was found in 46 patients with congenital nystagmus. Abnormal patterns of OKN, such as superimposition of pendular oscillations on the optokinetic slow component and inversion of OKN, were observed. Optokinetic gain (eye movement velocity/drum velocity) was decreased compared to that in normal subjects, and optokinetic after-nystagmus, or transient ...
متن کاملSuppression of congenital nystagmus.
Suppression of congenital nystagmus by eyelid closure was studied by electrooculography in four cases under various conditions in order to elucidate whether the suppression is caused by blocking of fixation or not. The nystagmus persisted in the light as well as in the dark provided that the eyes were kept open. Frenzel's glasses did not suppress the nystagmus except for one case in whom jerky ...
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ژورنال
عنوان ژورنال: Journal of Neurology, Neurosurgery & Psychiatry
سال: 1955
ISSN: 0022-3050
DOI: 10.1136/jnnp.18.3.196