See Also: fourth cranial nerve(medicine)
Fourth cranial nerve(health)
fourth lumbar nerve(medicine)
Cranial nerve II(health)
Cranial nerve XI(health)
Cranial nerve XII(health)
Cranial nerve I(health)
Fifth cranial nerve(health)
First cranial nerve(health)
cranial nerve XI(medicine)

Fourth cranial nerve (health)


The fourth cranial nerve, the trochlear nerve, is the nerve supply to the superior oblique muscle of the eye, one of the muscles that moves the eye. Paralysis of the trochlear nerve results in rotation of the eyeball upward and outward (and, therefore, double vision).