. . "Trochlear+Nerve"@en . "A08.800.800.120.800" . "Trochlear nerve"@en . . "The trochlear nerve (the fourth cranial nerve) (from Ancient Greek \u03C4\u03C1\u03BF\u03C7\u03B9\u03BB\u03AD\u03B1 trokhil\u00E9a, \u201Cpulley; block-and-tackle equipment\u201D) is a motor nerve (a \u201Csomatic efferent\u201D nerve) that only innervates one single muscle: the superior oblique muscle of the eye.The trochlear nerve is unique among the cranial nerves in several respects:It is the smallest nerve in terms of the number of axons it contains. It has the greatest intracranial length."@en . . "nervus trochlearis"@en .