The sixth cranial nerve (C1) is an exclu-sively somatomotor nerve, which innervates the lateral rectus muscle (E2) of the extra-ocu-lar muscles. Its fibers originate from thelarge, multipolar neurons of the nucleus ofthe abducens nerve (C3), which lies in thepons in the floor of the rhomboid fossa. The fibers exit at the basal mar-gin of the pons above the pyramid. After taking a long intradural course, the nerve passes through the cavernous sinus and leaves the cranial cavity through the supe-rior orbital fissure.
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