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CN VI palsy (Aetiology (Trauma
TBI, Neoplastic
CNS tumour/met, Vascular
…
CN VI palsy
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Pathophysiology
Defect
Lesion in CN VI, paralysis of
lateral rectus
Mechanism
Unapposed medial rectus, eye moves medially
Physiology
CN VI responsible for lateral rectus,
which moves eye laterally
Long intracranial course of nerve
Diagnosis
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Investigations
Bloods
FBC, CRP, U+E, LFT,
clotting, lipids, glucose
Imaging
CT head (SOL, ischemia)
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History
PMH
Previous strokes,
neuro disease
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PC/HPC
Recent trauma, infection,
raised ICP, symptoms
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SH
living arrangements, social support,
smoking, alcohol
Clinical
presentation
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Abnormal eye movements
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