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Treatment for this type of palsy may include patching, prisms, or even surgery if necessary. top of page. Sixth Cranial Nerve (Abducens Nerve) Palsy. Sixth cranial nerve palsy, also referred to at Abducens nerve palsy, can be caused by a head injury, brain tumors, infections, aneurysms, or multiple sclerosis.Depending on the condition, there may be increased pressure on the affected nerve or a decrease in blood flow to the nerve.reatment for this type of palsy may include patching, prisms, or even surgery if necessary. top of page. Sixth Cranial Nerve (Abducens Nerve) Palsy. Sixth cranial nerve palsy, also referred to at Abducens nerve palsy, can be caused by a head injury, brain tumors, infections, aneurysms, or multiple sclerosis.
1 A disorder affecting the brain, such as an aneurysm or brain tumor, may also cause third nerve palsy. Diabetes and migraines are other possible causes.  Fourth nerve palsy is often a congenital birth defect, which means that a baby is born with it. But a head injury, stroke, or tumor can also cause fourth nerve palsy.