Question 2285
{"accessible":false,"alternatives":[{"id":11317,"text":"It carries parasympathetic fibers from the Edinger-Westphal nucleus."},{"id":11318,"text":"It exits the brainstem at the pontomedullary junction."},{"id":11319,"text":"Its fibers decussate in the dorsal midbrain. "},{"id":11320,"text":"It innervates the superior rectus muscle. "},{"id":11321,"text":"It passes into the cavernous sinus via Dorello's canal. "}],"archived":false,"correctAlternativeId":11319,"explanation":"\u003cp\u003eThe \u003ca title=\"Trochlear nerve\" class=\"internal\" href=\"/articles/trochlear-nerve\"\u003etrochlear nerve\u003c/a\u003e\u0026nbsp;fibers course dorsally from the nucleus in the midbrain and decussate dorsal to the periaqueductal grey matter before exiting the\u0026nbsp;brainstem\u0026nbsp;immediately below the\u0026nbsp;inferior colliculus. It innervates \u003ca title=\"Superior oblique muscle\" class=\"internal\" href=\"/articles/superior-oblique-muscle\"\u003esuperior oblique muscle\u003c/a\u003e.\u0026nbsp;\u003c/p\u003e\u003cp\u003eIt is the abducens nerve\u0026nbsp;that passes through \u003ca title=\"Dorello's canal\" class=\"internal\" href=\"/articles/dorello-canal\"\u003eDorello's canal\u003c/a\u003e.\u0026nbsp;\u003c/p\u003e","id":2285,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/2286","nextQuestionPath":"/articles/trochlear-nerve/questions/2136","relatedArticles":[],"alsoUsedIn":[],"stem":"\u003cp\u003eWhich of the following statements regarding the trochlear nerve (CN IV) is true?\u003c/p\u003e","menuLinks":[{"text":"Report problem with question","url":"https://docs.google.com/forms/d/e/1FAIpQLSfO3soWYhOjJ7yErSysyCe5V4A1CqW7WK3rDA7MtAkecMGqNw/viewform?entry.1624461248\u0026entry.553583435=https://radiopaedia.org/questions/2285"}],"attemptsPercentages":[{"alternativeId":"11318","percentage":12},{"alternativeId":"11317","percentage":8},{"alternativeId":"11319","percentage":46},{"alternativeId":"11321","percentage":27},{"alternativeId":"11320","percentage":8}],"promptToLogin":false,"questionManager":false,"articleId":"trochlear-nerve"}