2023年7月15日 · The trochlear nerve is the fourth cranial nerve (CN IV) and one of the ocular motor nerves that controls eye movement. The trochlear nerve, while the smallest of the cranial nerves, has the longest intracranial course as it is the …

The trochlear nerve (/ ˈ t r ɒ k l ɪər /), [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 oblique muscle of the eye (which operates through the pulley-like trochlea).

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 movement. You have two trochlear nerves — one for each eye. They’re one of 12 sets of cranial nerves.

2019年3月13日 · 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 motor function.

2023年10月30日 · The trochlear nerve (CN IV) arises from the trochlear nucleus located within the periaqueductal gray substance of the midbrain and emerges on the dorsal midbrain caudal to the inferior colliculus. It then crosses the midline, before passing anteriorly around the contralateral side of the brainstem .

2023年2月7日 · The 12 cranial nerves are pairs of nerves that start in different parts of your brain. They control everything from your facial expression to digestion. Learn more.

2024年9月25日 · 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 gaze from side to...

The trochlear nerve is the fourth Cranial Nerve (CNIV) with the longest intracranial course, but also the thinnest. It has a general somatic efferent (somatic motor) nerve, which innervates a single muscle (superior oblique muscle) on the contralateral side of its origin.

2023年7月12日 · The trochlear nerve (CN IV) is a paired cranial nerve that is responsible for innervating the superior oblique muscle. As a result, it causes the eyeball to move downward and inward. The nucleus of CN IV is located in the periaqueductal grey matter of the inferior part of the midbrain. The emerging fibers decussate beneath the superior ...

2023年7月26日 · The trochlear nerve is one of 12 pairs of cranial nerves that stem from the brain. Also known as CN IV or cranial nerve 4, it is the fourth set of nerves that extends from the brain. It is a motor nerve that is part of the peripheral nervous system.