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).

2025年2月10日 · In this article, we shall look at the anatomy of the trochear nerve – its course, motor functions and clinical relevance. Access this feature with pro. The trochlear nerve arises from the trochlear nucleus of the brain, emerging from the posterior aspect of the midbrain (it is the only cranial nerve to exit from the posterior midbrain).

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 …

2024年7月22日 · 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 .

Determining the onset, severity, and chronicity of symptoms can be vital in delineating between the various etiologies of a CN 4 palsy. Furthermore, careful history including associated symptoms and other past medical history can help distinguish a CN 4 …

2023年10月30日 · The trochlear nerve is the fourth paired cranial nerve (CN IV). Along with the oculomotor nerve (CN III) and the abducens nerve (CN VI), it is responsible for controlling movement of the eyeball. Interestingly, the trochlear nerve has the longest intracranial course despite being the smallest of all cranial nerves (by number of axons).

2023年11月3日 · Trochlear nerve (CN IV) Cranial nerve 4 is a general somatic motor nerve. The trochlear nerve originates from the midbrain and enters the orbit through the superior orbital fissure, supplying one extraocular muscle thus playing a role in eye movement.

2024年12月23日 · 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 oblique muscle with motor fibers (TA: nervus trochlearis or nervus cranialis IV).

1 天前 · ChatGPT 中文版是 OpenAI 开发的 ChatGPT 模型的中文优化版本，专为中文用户，提供更流畅、更精准的智能对话。全面体验 ChatGPT 中文版，无需翻墙，支持 GPT-4、GPT-4o、o1、o3 和本地化功能。本项目为用户提供一站式的 ChatGPT 中文版使用指南，包括国内可用的 ChatGPT 镜像网站推荐和使用教程，帮助快速上手 ...

2019年10月30日 · The trochlear nerve (cranial nerve IV) supplies one of the extraocular muscles: the superior oblique muscle. In this video, I discuss the anatomy and function of the trochlear nerve, as well...