Oculomotor Abnormalities in Cerebral Palsy

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Neurological, neuro-ophthalmologic and neurootologic studies were performed on sixty-eight institutionalized children with cerebral palsy. Convergent squint was noted in 6 patients, 4 of them were born with low birth weight.<BR>Disturbance of upward gaze was seen in 20% of the athetotic type patients, but only one had both upward and downward gaze palsy. Spontaneous and gaze nystagmus was found more often in the spastic type patients.<BR>The incidence of non-gaze nystagmus under Frenzel's spectacles was 28% and was not different between the spastic and athetotic types. Electronystagmograph (ENG) recording showed spontaneous nystagmus in 83% of the patients, which was more common in the spastic type, while gaze nystagmus was predominant in the athetotic type.<BR>The optokinetic nystagmus and the eye tracking test (ETT) were abnormal in the majority of the patient with athetotic movements.<BR>The observation by the naked-eye detected almost the same number of the patients with the optokinetic nystagmus as compared to that by the ENG, but ENG revealed much more ETT changes.
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