Neuroanatomy: Rubrospinal, Vestibulospinal Tracts & Cerebellum
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Questions and Answers

Which cranial nerve is responsible for voluntary motor to the superior oblique muscle?

  • CN V
  • CN IV (correct)
  • CN III
  • CN VI
  • What is the normal action of the inferior oblique muscle?

  • Abduction and elevation of the eyeball
  • Depression and medial rotation of the eyeball
  • Abduction and lateral rotation of the eyeball (correct)
  • Adduction of the eyeball
  • What is the pathway of the oculomotor nerve (CN III)?

  • From the midbrain, through the superior orbital fissure, to the eyeball (correct)
  • From the cerebrum, through the optic foramen, to the eyeball
  • From the cerebellum, through the foramen magnum, to the eyeball
  • From the pons, through the inferior orbital fissure, to the eyeball
  • What is the function of the general visceral efferent (GVE) modality of the oculomotor nerve?

    <p>Visceral motor (parasympathetic) innervation to the sphincter pupillae</p> Signup and view all the answers

    Which of the following is a common cause of oculomotor nerve (CN III) injury?

    <p>Diabetic neuropathy</p> Signup and view all the answers

    What is the action of the lateral rectus muscle?

    <p>Abduction of the eyeball</p> Signup and view all the answers

    What is the normal action of the superior oblique muscle?

    <p>Abduction, depression, and medial rotation of the eyeball</p> Signup and view all the answers

    What is the common presentation of a patient with an oculomotor nerve (CN III) injury?

    <p>Ptosis, mydriasis, and down and out gaze</p> Signup and view all the answers

    How should the cranial nerves III, IV, and VI be tested?

    <p>Test each eye individually</p> Signup and view all the answers

    Which foramen does the abducens nerve (CN VI) exit through?

    <p>Superior orbital fissure</p> Signup and view all the answers

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