What is the trochlear nerve? Your trochlear nerve, also known as the cranial nerve 4 or CN IV, is a motor (movement) nerve that sends signals from your brain to one of the muscles that …

The trochlear nerve (/ ˈtrɒklɪər /), [1] (lit. pulley-like nerve) also known as the fourth cranial nerve, cranial nerve IV, or CN IV, is a cranial nerve that innervates a single muscle - the superior …

Dec 10, 2025 · The trochlear nerve is the fourth paired cranial nerve. It is the smallest cranial nerve (by number of axons) and the cranial nerve with the longest intracranial course. It has a …

Sep 25, 2024 · The trochlear nerve, also known as cranial nerve 4 (CN IV), controls the superior oblique muscle in your eye. This muscle allows you to move your eyeball down and shift your …

The trochlear nerve transmits general somatic efferent impulses, which synapse in the skeletal fibers of the superior oblique muscle. The superior oblique muscles allow for depression, …

Mar 22, 2025 · The trochlear nerve is the fourth cranial nerve (CN IV), that contains somatic efferent (motor) nerve fibers responsible for controlling eye movements. It is the smallest of all …

4 days ago · Symptoms of Trochlear Nerve Damage Damage to the trochlear nerve results in trochlear nerve palsy, or fourth nerve palsy, which impairs the function of the superior oblique …

Function: Innervates the superior oblique muscle, which depresses, rotates laterally, and intorts the eyeball. Located in the superior orbital fissure. Description: The trochlear nerve, a purely …

Apr 10, 2019 · CN IV is the trochlear nerve. It provides general somatic efferent to the extraocular superior oblique muscle. It assists in depressing and abducting the eye. It connects to the …

Oct 30, 2023 · The trochlear nerve is a purely motor nerve, responsible for providing general somatic efferent (GSE)/motor innervation to just one muscle, the superior oblique muscle of …