A 45-year-old lady complaining from new visual disturbance, on examination there are problems with horizontal gaze, delay in abduction and nystagmus on adduction she denies any tra... A 45-year-old lady complaining from new visual disturbance, on examination there are problems with horizontal gaze, delay in abduction and nystagmus on adduction she denies any trauma, most likely cause is?
Understand the Problem
The question is asking about a medical case involving a 45-year-old woman experiencing visual disturbances, specifically issues with horizontal gaze and nystagmus on adduction. It seeks to determine the most likely cause based on the presented symptoms.
Answer
Unilateral INO
The final answer is Unilateral INO
Answer for screen readers
The final answer is Unilateral INO
More Information
Internuclear ophthalmoplegia (INO) occurs due to a lesion within the medial longitudinal fasciculus, often causing specific eye movement disorders. Unilateral INO typically presents with nystagmus in the adducting eye and a failure to adduct the ipsilateral eye.
Tips
A common mistake is to choose bilateral INO, which would show more extensive deficiencies in eye movement.
Sources
- One-and-a-Half Syndrome in a Case of Brainstem Bleed - PubMed - pubmed.ncbi.nlm.nih.gov
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