Oral Cavity and Palate Anatomy Quiz

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Questions and Answers

Which bones form the hard palate?

  • Mandibular bones
  • Both maxillary and palatine bones (correct)
  • Palatine bones
  • Maxillary bones

Where is the incisive fossa located?

  • Posterior to the hard palate
  • Anterior to the hard palate (correct)
  • In the soft palate
  • In the tongue

What is the main action of the musculus uvula?

  • To raise the uvula (correct)
  • To lower the uvula
  • To widen the uvula
  • To tense the uvula

Which muscle inserts into the soft palate?

<p>Levator veli palatini muscle (D)</p> Signup and view all the answers

What is the innervation of the tensor veli palatini muscle?

<p>CN V (C)</p> Signup and view all the answers

Which nerve exits the greater palatine foramen and courses along the hard palate?

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

Where does the lesser palatine nerve exit and course to?

<p>Lesser palatine foramen and soft palate (C)</p> Signup and view all the answers

What is the arterial supply of the hard and soft palate?

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

What is the main action of the levator veli palatini muscle?

<p>To raise the soft palate (D)</p> Signup and view all the answers

Which cranial nerve innervates all the muscles of the soft palate except the tensor veli palatini?

<p>CN X (Vagus Nerve) (D)</p> Signup and view all the answers

Which artery passes through the lesser palatine foramen to supply the soft palate?

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

Which nerve innervates all the intrinsic muscles of the tongue except the palatoglossus muscle?

<p>Hypoglossal nerve (CN XII) (D)</p> Signup and view all the answers

Which nerve innervates the palatoglossus muscle?

<p>Vagus nerve (CN X) (A)</p> Signup and view all the answers

Which nerve innervates the anterior 2/3 of the tongue for general sensation?

<p>Trigeminal nerve (CN V3) (A)</p> Signup and view all the answers

Which nerve innervates the posterior 1/3 of the tongue for general sensation?

<p>Glossopharyngeal nerve (CN IX) (D)</p> Signup and view all the answers

Which nerve innervates the anterior 2/3 of the tongue for taste?

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

Which nerve innervates the posterior 1/3 of the tongue for taste?

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

Which artery supplies the lingual artery and lingual vein?

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

Which nerve supplies the inferior (mandibular) alveolar arch?

<p>Trigeminal nerve (CN V3) (C)</p> Signup and view all the answers

Which nerve supplies the superior (maxillary) alveolar arch?

<p>Vagus nerve (CN X) (C)</p> Signup and view all the answers

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Study Notes

Hard Palate Anatomy

  • The hard palate is formed by the maxilla and palatine bones.
  • The incisive fossa is located in the midline of the anterior hard palate, between the central incisors.

Muscles of the Soft Palate

  • The main action of the musculus uvula is to shorten and elevate the uvula during swallowing.
  • The levator veli palatini muscle primarily elevates the soft palate to close off the nasopharynx during swallowing.
  • The tensor veli palatini muscle is innervated by the mandibular nerve (V3) of the trigeminal nerve.

Nerve and Vascular Supply

  • The greater palatine nerve exits the greater palatine foramen and courses along the hard palate, providing sensory innervation.
  • The lesser palatine nerve exits through the lesser palatine foramen, supplying the soft palate and tonsillar region.
  • The arterial supply of the hard and soft palate primarily comes from the maxillary artery, including the greater and lesser palatine branches.
  • The artery passing through the lesser palatine foramen to supply the soft palate is the lesser palatine artery.

Tongue Innervation

  • All intrinsic muscles of the tongue, except the palatoglossus, are innervated by the hypoglossal nerve (CN XII).
  • The palatoglossus muscle is innervated by the vagus nerve (CN X).
  • The anterior two-thirds of the tongue receives general sensation from the lingual nerve, a branch of the mandibular nerve (V3).
  • The posterior one-third of the tongue is innervated for general sensation by the glossopharyngeal nerve (CN IX).
  • The chorda tympani, a branch of the facial nerve (CN VII), innervates the anterior two-thirds of the tongue for taste.
  • Taste sensation for the posterior one-third of the tongue is provided by the glossopharyngeal nerve (CN IX).

Alveolar Arch Innervation

  • The inferior (mandibular) alveolar arch is supplied by the inferior alveolar nerve, a branch of the mandibular nerve (V3).
  • The superior (maxillary) alveolar arch is supplied by the superior alveolar nerves, branches of the maxillary nerve (V2).

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