Trochlear nerve


The nerve that controls the superior oblique muscle of the eye, one of the muscles that move the eye (extraocular muscles). Paralysis of the trochlear nerve results in rotation of the eyeball upward and outward (and, therefore, in double vision). The trochlear nerve is the fourth cranial nerve, and it is the only cranial nerve that arises from the back of the brain stem. It follows the longest course within the skull of any of the cranial nerves.

Read Also:

  • Tropical diabetes

    Diabetes mellitus associated with chronic malnutrition and, sometimes, chronic pancreatitis. Whether tropical diabetes exists as a distinct entity is under debate. While malnutrition may influence the expression of diabetes, the evidence that diabetes can be directly caused by protein deficiency is not convincing. Also called malnutrition-related diabetes.

  • Tropical oil

    Coconut, palm kernel or palm oil. Like all fats and oils, these three oils contain various types of fatty acids but, unlike other plant oils, they contain a great deal of saturated fatty acids. Coconut oil is 92%, palm kernel oil 82% and palm oil 50% saturated fat. These oils are found in commercial cakes, […]

  • True cramp

    tetany, contractures, and dystonic cramps.

  • True rib

    The lower five ribs do not directly connect to the sternum and are known as false ribs. The upper three false ribs connect to the costal cartilages of the ribs just above them. The last two false ribs, however, usually have no ventral attachment (no anchor at all in front) and are called floating, fluctuating […]

  • Truncate

    To shorten, to cut short. A malformation (birth defect) may truncate a limb. A mutation may create a stop codon that truncates a protein. From the Latin truncare maening to cut short or mutilate from truncus, trunk.


Disclaimer: Trochlear nerve definition / meaning should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional. All content on this website is for informational purposes only.