What cranial nerve causes vertical diplopia?
Trochlear nerve palsy is the most common cause for vertical extraocular muscle weakness and vertical diplopia.
What causes vertical binocular diplopia?
Binocular diplopia occurs when both eyes are open and resolves when either eye is closed. It is caused by a misalignment of the eyes, also called strabismus. Conditions that affect the cranial nerves supplying the muscles that control the eyes can cause binocular diplopia.
Which cranial nerve is responsible for vertical eye movement?
The oculomotor nerve
The oculomotor nerve is the third cranial nerve (CN III). It enables eye movements, such as focusing on an object that’s in motion. Cranial nerve III also makes it possible to move your eyes up, down and side to side.
Which is the 4th cranial nerve?
The trochlear nerve is one of 12 sets of cranial nerves. It is part of the autonomic nervous system, which supplies (innervates) many of your organs, including the eyes. This nerve is the fourth set of cranial nerves (CN IV or cranial nerve 4). It is a motor nerve that sends signals from the brain to the muscles.
What is the difference between horizontal and vertical diplopia?
Vertical diplopia indicates vertical alignment of the images, which usually suggests pathology in the vertical muscles, including superior oblique, inferior oblique, superior rectus, and inferior rectus. Horizontal diplopia suggests pathology of the medial or lateral rectus.
What are the differential diagnosis of vertical diplopia?
The differential diagnosis for vertical diplopia includes oculomotor nerve palsy, superior oblique palsy, restrictive ophthalmopathies, myasthenia gravis, and skew deviation. This differential diagnosis is best used to sort out signs and symptoms in a patient with a vertical misalignment and diplopia.
What is cranial nerve VI?
Cranial nerve 6, also called the abducens nerve, controls the movement of the lateral rectus muscle. This muscle moves the eye outward, away from the nose. When this nerve is damaged, it may not be able to do its job.