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Acute optic neuritis. A cognitive and magnetic resonance imaging study
1Department of Neuropsychiatry, Institute of Neurology, London, UK.
Brain : a Journal of Neurology
|October 1, 1992
Summary
Acute optic neuritis (ON) patients with brain lesions showed significant attention and processing speed deficits. The Symbol Digit-Substitution Test effectively identified 70% of patients with brain abnormalities.
Area of Science:
- Neuroscience
- Ophthalmology
- Cognitive Psychology
Background:
- Optic neuritis (ON) can affect visual pathways and potentially lead to cognitive impairments.
- Brain abnormalities are observed in a significant portion of ON patients.
Purpose of the Study:
- To investigate attention and information processing speed in acute optic neuritis patients.
- To determine the impact of brain lesions on cognitive function in ON.
Main Methods:
- Comparison of 42 acute optic neuritis patients with a matched normal control group.
- Utilized a battery of tests for attention and information processing speed.
- Magnetic resonance imaging (MRI) was used to identify brain abnormalities.
Main Results:
- Patients with brain abnormalities on MRI showed greater impairment in cognitive tests compared to those without lesions or controls.
- No significant cognitive differences were found between normal controls and ON patients without brain involvement, except on the pegboard task.
- Total brain lesion area correlated with attention deficits, with the Symbol Digit-Substitution Test being particularly sensitive.
Conclusions:
- Brain lesions in acute optic neuritis are associated with measurable deficits in attention and information processing speed.
- Cognitive assessment, particularly using tests like the Symbol Digit-Substitution Test, can aid in identifying ON patients with underlying brain abnormalities.