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Oculomotor Nerve (CN 3)

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    * The CN 3 nucleus lies within the posterior midbrain (at the level of the superior colliculus).
  • It produces pupillary constriction and 4 of the 6 cardinal eye movements of gaze: adduction (medial rectus), elevation when the eye is abducted (superior rectus), depression when the eye is abducted (inferior rectus), elevation when the eye is adducted (inferior oblique).