Unlike most other cranial nerves, the trochlear nerve is exclusively a motor nerve (somatic efferent nerve). The trochlear nerve is unique among the cranial nerves in several respects: It is the smallest …

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 control eye …

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, abduction, and …

Sep 25, 2024 · Find out what you need to know about the trochlear nerve. Discover its functions, location, and related health conditions.

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 purely somatic …

Discover the origin, course and supply of the Trochlear Nerve. Learn how it innervates the superior oblique muscle.

3 days ago · The trochlear nerve provides motor control to only one muscle: the superior oblique muscle of the eye. This muscle is unique because its tendon passes through a cartilaginous, pulley-like …

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 the cranial …

Sep 16, 2025 · The trochlear nerve is the fourth (CN IV) and thinnest cranial nerve. It exits the midbrain posteriorly, eventually passes into the cavernous sinus and into the orbit where it supplies superior …

Sep 8, 2024 · The fourth cranial nerve, also known as the trochlear nerve, arises from the midbrain at the level of the inferior colliculus (ventral to the Sylvian aqueduct). This nerve supplies only 1 muscle …