Fourth nerve palsy

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Fourth nerve palsy is a condition caused by weakness or paralysis of the superior oblique muscle. When present at birth, it is known as congenital fourth nerve palsy.

• Brown’s syndrome: Restriction of superior oblique movement is found in Brown’s syndrome, leading to difficulty elevating the eye in the adducted position
• Congenital fourth nerve palsy
• Head trauma: Superior oblique palsy is a common complication of closed head trauma
• Superior oblique myokymia is an uncommon neurological condition caused by vascular compression of the trochlear nerve resulting in repeated, brief, involuntary episodes of movement of the eye.

• Trochlear nerve

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