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Brain
Anatomy
Skull Base and Cranial Nerves
Oculomotor Nerve (CNIII)
Oculomotor Nerve (CNIII)
Karen L. Salzman, MD; Philip R. Chapman, MD
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TERMINOLOGY

  • Abbreviations

    • Oculomotor nerve (CNIII)
    • Oculomotor nuclear complex (ONC)

  • Synonyms

    • 3rd cranial nerve

  • Definitions

    • CNIII: Motor nerve to extraocular muscles (EOMs) except lateral rectus (CNVI) and superior oblique muscles (CNIV); parasympathetic motor to pupillary sphincter and ciliary muscle

IMAGING ANATOMY

  • Overview

    • Oculomotor Nuclear Complex

      • Intramesencephalic Segment

        • Interpeduncular Cisternal Segment

          • Petroclinoid Segment

            • Trigonal Segment

              • Cavernous Segment

                • Fissural Segment

                  • Orbital Segment

                    ANATOMY IMAGING ISSUES

                    • Imaging Recommendations

                      • Imaging Sweet Spots

                        • Imaging Pitfalls

                          CLINICAL IMPLICATIONS

                          • Clinical Importance

                            Related Anatomy
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                            Related Differential Diagnoses
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                            References
                            Tables

                            Tables

                            TERMINOLOGY

                            • Abbreviations

                              • Oculomotor nerve (CNIII)
                              • Oculomotor nuclear complex (ONC)

                            • Synonyms

                              • 3rd cranial nerve

                            • Definitions

                              • CNIII: Motor nerve to extraocular muscles (EOMs) except lateral rectus (CNVI) and superior oblique muscles (CNIV); parasympathetic motor to pupillary sphincter and ciliary muscle

                            IMAGING ANATOMY

                            • Overview

                              • Oculomotor Nuclear Complex

                                • Intramesencephalic Segment

                                  • Interpeduncular Cisternal Segment

                                    • Petroclinoid Segment

                                      • Trigonal Segment

                                        • Cavernous Segment

                                          • Fissural Segment

                                            • Orbital Segment

                                              ANATOMY IMAGING ISSUES

                                              • Imaging Recommendations

                                                • Imaging Sweet Spots

                                                  • Imaging Pitfalls

                                                    CLINICAL IMPLICATIONS

                                                    • Clinical Importance