Anatomy: Middle Cranial Fossa
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Questions and Answers

What forms the boundary between the anterior and middle cranial fossae?

  • Prechiasmatic sulcus (correct)
  • Optic canals
  • Petrous part of the temporal bone
  • Sella turcica
  • Which bone contributes to the elevation of the floor in the midline of the middle cranial fossa?

  • Frontal bone
  • Temporal bone
  • Sphenoid bone (correct)
  • Ethmoid bone
  • What does the sella turcica contain?

  • Parotid gland
  • Pituitary gland (correct)
  • Thyroid gland
  • Pineal gland
  • Which part of the sphenoid bone is uniquely modified and located posterior to the chiasmatic sulcus?

    <p>Sella turcica</p> Signup and view all the answers

    What do the lateral projections from the tuberculum sellae form?

    <p>Middle clinoid processes</p> Signup and view all the answers

    Which part of the temporal bone contributes to the posterior boundaries of the middle cranial fossa?

    <p>Petrous part</p> Signup and view all the answers

    What forms a distinct boundary between the lateral parts of the anterior and middle cranial fossae?

    <p>Lesser wings of the sphenoid</p> Signup and view all the answers

    Where does each lesser wing of the sphenoid end laterally in relation to the greater wing of the sphenoid?

    <p>Sharp point at the junction of the frontal bone and greater wing</p> Signup and view all the answers

    What serves as the anterior point of attachment for the tentorium cerebelli in the skull?

    <p>Anterior clinoid process</p> Signup and view all the answers

    Through which opening in the lesser wing of the sphenoid does the ophthalmic artery and optic nerve pass as they exit the cranial cavity to enter the orbit?

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

    Where is the sella turcica located in relation to the sphenoid bone?

    <p>Between the two lesser wings</p> Signup and view all the answers

    What structure overhangs the anterior part of the middle cranial fossae and ends laterally at the junction of the frontal bone and greater wing of sphenoid?

    <p>Lesser wing of sphenoid</p> Signup and view all the answers

    What is the bony ridge at the top of the posterior wall of the sella turcica called?

    <p>Dorsum sellae</p> Signup and view all the answers

    Which of the following nerves does NOT pass through the superior orbital fissure?

    <p>Facial nerve [VII]</p> Signup and view all the answers

    What structure passes through the foramen rotundum?

    <p>Trigeminal nerve [V2]</p> Signup and view all the answers

    Which fossa serves as a major passageway between the middle cranial fossa and the orbit?

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

    Where are the greater wing and lesser wing of the sphenoid located in relation to each other?

    <p>Greater wing is lateral to the lesser wing</p> Signup and view all the answers

    Which structure allows passage between the extracranial infratemporal fossa and the middle cranial fossa?

    <p>Foramen ovale</p> Signup and view all the answers

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