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 …

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

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 …

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.

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 …

The Trochlear nerve, also known as the cranial nerve IV or CN IV, is the fourth of the twelve cranial nerves and is responsible for controlling the movement of the superior oblique muscle in the eye.

Oct 30, 2023 · This article will delve deeper into the anatomy and function of the trochlear nerve, while reviewing the origin and course of the nerve, its field of innervation and clinical significance.

Apr 10, 2019 · An overview of the trochlear nerve (cranial nerve 4), including clinically relevant anatomy and associated pathology.