Fourth cranial nerve palsy or trochlear nerve palsy, is a condition affecting cranial nerve 4 (IV),[1] the trochlear nerve, which is one of the cranial nerves. It causes weakness or paralysis of the superior oblique muscle that it innervates. This condition often causes vertical or near vertical double vision as the weakened muscle prevents the eyes from moving in the same direction together.
Because the trochlear nerve is the thinnest and has the longest intracranial course of the cranial nerves, it is particularly vulnerable to traumatic injury.
To compensate for the double-vision resulting from the weakness of the superior oblique, patients characteristically tilt their head down and to the side opposite the affected muscle.
fourth, nerve, palsy, fourth, cranial, nerve, palsy, trochlear, nerve, palsy, condition, affecting, cranial, nerve, trochlear, nerve, which, cranial, nerves, causes, weakness, paralysis, superior, oblique, muscle, that, innervates, this, condition, often, caus. Fourth cranial nerve palsy or trochlear nerve palsy is a condition affecting cranial nerve 4 IV 1 the trochlear nerve which is one of the cranial nerves It causes weakness or paralysis of the superior oblique muscle that it innervates This condition often causes vertical or near vertical double vision as the weakened muscle prevents the eyes from moving in the same direction together Fourth Cranial Nerve PalsyOther namesTrochlear nerve palsyTrochlear nerveSpecialtyOphthalmology Because the trochlear nerve is the thinnest and has the longest intracranial course of the cranial nerves it is particularly vulnerable to traumatic injury To compensate for the double vision resulting from the weakness of the superior oblique patients characteristically tilt their head down and to the side opposite the affected muscle When present at birth it is known as congenital fourth nerve palsy See also editHarada Ito procedureReferences edit Fourth Nerve Palsy www aao org Archived from the original on 30 January 2019 Retrieved 25 June 2019 External links edit nbsp This article about a medical condition affecting the nervous system is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Fourth nerve palsy amp oldid 1221032281, wikipedia, wiki, book, books, library,
