Mastication Muscles Anatomy

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Questions and Answers

Which muscle is responsible for elevating the mandible during chewing?

  • Masseter muscle (correct)
  • Lateral pterygoid muscle
  • Temporal muscle
  • Medial pterygoid muscle

Which muscle is located deep to the zygomatic arch and has three layers?

  • Temporal muscle
  • Masseter muscle (correct)
  • Lateral pterygoid muscle
  • Medial pterygoid muscle

Which muscle has its origin on the zygomatic arch and inserts into the coronoid process and the anterior border of the ramus of the mandible?

  • Medial pterygoid muscle
  • Masseter muscle (correct)
  • Lateral pterygoid muscle
  • Temporal muscle

Which muscle is responsible for lateral excursion of the mandible?

<p>Lateral pterygoid muscle (B)</p> Signup and view all the answers

Which muscle is responsible for medial excursion of the mandible?

<p>Medial pterygoid muscle (A)</p> Signup and view all the answers

Which muscle plays a role in retracting the mandible?

<p>Temporal muscle (D)</p> Signup and view all the answers

The temporal muscle has its origin from which of the following structures?

<p>inferior temporal line (D)</p> Signup and view all the answers

Which nerve innervates the lateral pterygoid muscle?

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

What is the function of the medial pterygoid muscle?

<p>Protrude the mandible (C)</p> Signup and view all the answers

Which artery is located between the superficial and deep layers of the temporalis fascia?

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

The lateral pterygoid muscle is responsible for which action?

<p>Protruding the mandible (C)</p> Signup and view all the answers

Which structure does the medial pterygoid muscle have its origin from?

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

Innervation of the temporal muscle is provided by which nerve?

<p>Mandibular nerve (A)</p> Signup and view all the answers

Which nerve provides innervation to the lateral pterygoid muscle?

<p>Mandibular nerve (C)</p> Signup and view all the answers

Where does the temporal muscle insert?

<p>Anterior border of mandibular ramus (D)</p> Signup and view all the answers

What forms the roof of the oral cavity?

<p>Hard and soft palates (C)</p> Signup and view all the answers

Where is the vestibule of the oral cavity located?

<p>Externally by gums and teeth (A)</p> Signup and view all the answers

What is the function of the orbicularis oris muscle?

<p>Surrounding the oral orifice (D)</p> Signup and view all the answers

What gives the reddish color to the vermilion border of the lips?

<p>Blood vessels (D)</p> Signup and view all the answers

What separates the vestibule from the oral cavity proper when the teeth are apposed?

<p>Hard and soft palates (D)</p> Signup and view all the answers

What forms the floor of the oral cavity?

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

Which structure connects each lip to the gum?

<p>Median labial frenulum (C)</p> Signup and view all the answers

Where are the largest buccal mucous glands located?

<p>External to buccinator, around parotid duct (C)</p> Signup and view all the answers

What is the composition of gums (gingivae)?

<p>Orthokeratinized stratified squamous epithelium (B)</p> Signup and view all the answers

What is the function of the hard palate?

<p>Formed by palatine processes of maxillae and horizontal plates of palatine bones (B)</p> Signup and view all the answers

What forms a narrow, low ridge in the hard palate?

<p>Palatine raphe (D)</p> Signup and view all the answers

Which artery supplies the lips with blood?

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

Where do the submandibular lymph nodes drain from the lips?

<p>Facial vein (C)</p> Signup and view all the answers

What provides sensory innervation to the lower lip?

<p>Mandibular nerve (A)</p> Signup and view all the answers

Which nerve provides sensory innervation to the upper lip?

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

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