Anatomy of the Posterior Cranial Fossa

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Questions and Answers

Which area of the skull is formed by frontal, orbital, maxillary, nasal, and mandibular bones?

  • Frontal
  • Nasal
  • Orbital (correct)
  • Maxillary

What is the significance of the pterion in the skull?

  • It houses the frontal bone
  • It is where the diploic veins open
  • It is located posteriorly
  • It is where the four bones articulate (correct)

What type of bone marrow is found in the diploë of the flat bones of the skull?

  • Red bone marrow (correct)
  • Yellow bone marrow
  • Spongy bone marrow
  • Compact bone marrow

What do emissary foramina in the flat bones of the skull transmit?

<p>Emissary veins (B)</p> Signup and view all the answers

How many diploic veins are usually found on each side of the skull?

<p>Four (B)</p> Signup and view all the answers

Which bones form the calvaria of the skull?

<p>Frontal, sphenoid, and parietal bones (B)</p> Signup and view all the answers

Which bone is located between the orbits and consists of a cribriform plate and perpendicular plate?

<p>Ethmoid bone (C)</p> Signup and view all the answers

What constitutes the anterior cranial fossa along with the frontal and sphenoid bones?

<p>Ethmoid bone (D)</p> Signup and view all the answers

Which part of the skull is bounded by the inner surface of the frontal bone and the limbus of the sphenoid bone?

<p>Intra Cranial Fossa (A)</p> Signup and view all the answers

What forms the anterior border of the prechiasmatic sulcus within the skull?

<p>Ethmoid bone (D)</p> Signup and view all the answers

Which skull landmark supports the olfactory bulb and constitutes part of the nasal septum?

<p>Cribriform plate (B)</p> Signup and view all the answers

What forms two triangular projections arising from the central sphenoid body in the skull?

<p>Lesser wings of sphenoid bone (C)</p> Signup and view all the answers

Where does the caroticotympanic artery originate from?

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

What is another name for the Vidian artery?

<p>Artery of the pterygoid canal (B)</p> Signup and view all the answers

Which artery supplies the dura mater of the anterior cranial fossa?

<p>Meningeal artery (C)</p> Signup and view all the answers

What is inconsistent in some individuals when it comes to arteries?

<p>Vidian artery (B)</p> Signup and view all the answers

Which part of the pituitary gland does the inferior hypophyseal artery supply?

<p>Posterior part (B)</p> Signup and view all the answers

With which artery does the Vidian artery finally anastomose?

<p>Greater palatine artery (A)</p> Signup and view all the answers

Which nerve is transmitted through the internal acoustic meatus?

<p>Facial nerve (CN VII) (A)</p> Signup and view all the answers

What structures are transmitted through the foramen magnum?

<p>Medulla of the brain, vertebral arteries, and spinal accessory nerve (B)</p> Signup and view all the answers

Which nerves are transmitted through the jugular foramina?

<p>Glossopharyngeal nerve and vagus nerve (B)</p> Signup and view all the answers

What is transmitted through the hypoglossal canal?

<p>Hypoglossal nerve (B)</p> Signup and view all the answers

Where are the cerebellar fossae located?

<p>Posteriorly to the foramen magnum (B)</p> Signup and view all the answers

What divides the cerebellar fossae medially?

<p>Internal occipital crest (D)</p> Signup and view all the answers

Which muscle is not mentioned in the text as being part of the muscles associated with the larynx?

<p>Masseter (B)</p> Signup and view all the answers

Which artery is involved in the vascularization of the structures mentioned in the text?

<p>Maxillary artery (C)</p> Signup and view all the answers

Which of the following nerves is not associated with the larynx according to the text?

<p>Hypoglossal nerve (B)</p> Signup and view all the answers

Which structure forms the inferior margin of the larynx?

<p>Cricoid cartilage (A)</p> Signup and view all the answers

Which ligament is found below the cricoid cartilage in the larynx?

<p>Cricotracheal ligament (B)</p> Signup and view all the answers

What is the function of the corniculate cartilages according to the text?

<p>To articulate with the apices of arytenoid cartilages (A)</p> Signup and view all the answers

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