Nerve, trochlear: The trochlear nerve controls the superior oblique muscle of the eye, one of the extraocular muscles, the muscles that move the eye. Paralysis of the trochlear nerve results in rotation of the eyeball upward and outward (and, therefore, double vision).
The trochlear nerve is the fourth cranial nerve. (The twelve cranial nerves emerge from or enter the skull as opposed to the spinal nerves which emerge from the vertebral column).
The trochlear nerve is the only cranial nerve that arises from the back of the brain stem. It follows the longest course within the skull of any of the cranial nerves.
Trochlear nerve palsy is mentioned in ophthalmology texts dating to the mid nineteenth century.
The trochlear nerve (the fourth cranial nerve, also called the fourth nerve or simply IV) is a motor nerve (a â€œsomatic efferentâ€ nerve) that innervates a single ...
CN IV. Trochlear Nerve The trochlear nerve is purely a motor nerve and is the only cranial nerve to exit the brain dorsally. The trochlear nerve supplies one muscle ...
Trochlear nerve: The trochlear nerve controls the superior oblique muscle of the eye, one of the extraocular muscles, the muscles that move the eye.
nerve (nerv) a cordlike structure comprising a collection of nerve fibers that convey impulses between a part of the central nervous system and some other body region.