It is the only cranial nerve that exits from the dorsal (rear) aspect of the brainstem. It innervates a muscle, the superior oblique muscle, on the opposite side (contralateral) from its nucleus. The …

Jul 15, 2023 · 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 …

Dec 23, 2024 · 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 …

Oct 30, 2023 · Course of the oculomotor, trochlear and abducens nerves. Synonyms: Cranial nerve IV, CN IV , show more... The trochlear nerve is the fourth paired cranial nerve (CN IV). …

Origin: Body of the sphenoid bone medial to the common tendinous ring. Damage to the trochlear nerve can be caused by either congenital or acquired causes. To compensate and reduce the …

Feb 10, 2025 · In this article, we shall look at the anatomy of the trochear nerve – its course, motor functions and clinical relevance. Explore, cut, dissect, annotate and manipulate our 3D …

Eye movements are controlled by three cranial nerves: the oculomotor, trochlear, and abducens nerves. Weakness of one or more of the extraocular muscles impairs movement of the …

Nov 10, 2015 · Cranial nerve IV (trochlear nerve) is a somatic motor nerve that innervates the superior oblique muscle, which intorts, infraducts, and abducts the globe. The nucleus of CN …

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 …

Nov 15, 2023 · Trochlear nerve palsies, or fourth nerve palsies, result in weakness of the superior oblique muscle. Vertical diplopia and ipsilateral hypertropia in the absence of ptosis, combined …