DR 5 - Face, Temporal and Infratemporal Fossa
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Questions and Answers

Which nerve is responsible for supplying taste to the anterior 2/3rds of the tongue?

  • Glossopharyngeal nerve
  • Vestibulocochlear nerve
  • Facial nerve (correct)
  • Hypoglossal nerve

    • What is the function of the parotid gland?

  • Production of mucus in the nasal cavity
  • Secretion of hormones
  • Production of tears
  • Secretion of saliva into the oral cavity (correct)

    • Which artery supplies the face with blood?

  • External carotid artery (correct)
  • Facial artery
  • Maxillary artery
  • Internal carotid artery

    • Which vein drains into the external jugular vein and eventually the subclavian vein?

    <p>Retromandibular vein</p> Signup and view all the answers

    Which muscle is responsible for raising the eyebrows?

    <p>Frontalis</p> Signup and view all the answers

    Which artery is the largest branch of the external carotid artery and can be found within the infratemporal fossa?

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

    What is the most important branch of the maxillary artery clinically?

    <p>Middle meningeal artery</p> Signup and view all the answers

    Why is the middle meningeal artery of clinical importance?

    <p>It is vulnerable to injury during head trauma</p> Signup and view all the answers

    Where is the pterygoid plexus located?

    <p>Infratemporal fossa</p> Signup and view all the answers

    Which nerve supplies the muscles of mastication?

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

    Which of the following structures does the auriculotemporal branch of the mandibular nerve supply?

    <p>All of the above</p> Signup and view all the answers

    Where does the inferior alveolar nerve enter the mandible?

    <p>Mandibular foramen</p> Signup and view all the answers

    What is the primary method of treatment for parotid gland neoplasms?

    <p>Surgery</p> Signup and view all the answers

    Which cranial nerve has a close relation to the parotid gland?

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

    What structures pass through the infratemporal fossa and could be affected by a tumour?

    <p>All of the above</p> Signup and view all the answers

    Which cranial nerves are involved in sensory and motor innervation to the face?

    <p>Cranial nerve 5 and 7</p> Signup and view all the answers

    Which nerve supplies the muscles of mastication?

    <p>Cranial nerve 5</p> Signup and view all the answers

    Which gland is located in the face and is innervated by the facial nerve?

    <p>Parotid gland</p> Signup and view all the answers

    Which muscles are involved in facial expression?

    <p>Occipitofrontalis, Orbicularis oculi, Orbicularis oris, Zygomaticus, Platysma</p> Signup and view all the answers

    What will you study in the temporal and infratemporal fossa?

    <p>Muscles of mastication and their nerve supply, and major contents</p> Signup and view all the answers

    Which bones of the facial skeleton were damaged in the injury?

    <p>Mandible and maxilla</p> Signup and view all the answers

    What other important structures of facial anatomy may have been damaged during this injury?

    <p>Muscles of the lower face, tongue, teeth, nasal cavity</p> Signup and view all the answers

    What is causing the streaking seen on the non-contrast CT?

    <p>Lead pellets remaining in the patient's face from the shotgun shell</p> Signup and view all the answers

    Which cranial nerves are involved in the sensory and motor innervation of the face?

    <p>Cranial nerve 5 and 7</p> Signup and view all the answers

    Which muscles are involved in mastication and what is their nerve supply?

    <p>Masseter and temporalis muscles, supplied by cranial nerve 5</p> Signup and view all the answers

    Which muscle is responsible for elevation and side-to-side movement of the mandible?

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

    Which muscle of mastication has its origin on the zygomatic bone and zygomatic arch?

    <p>Masseter muscle</p> Signup and view all the answers

    What is the space deep and inferior to the zygomatic arch, deep to the ramus of the mandible, and posterior to the maxilla called?

    <p>Infratemporal fossa</p> Signup and view all the answers

    Which muscle of mastication has two heads, with the deep head originating from the medial surface of the lateral pterygoid plate of the sphenoid bone, and the superficial head arising from the maxilla?

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

    Which muscle of mastication has two heads, with the upper head arising on the roof of the fossa and the lower head originating from the lateral surface of the lateral pterygoid plate?

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

    Study Notes

    Nerves and Blood Supply

    • The chorda tympani nerve is responsible for supplying taste to the anterior 2/3rds of the tongue.
    • The facial artery supplies the face with blood.
    • The posterior auricular vein drains into the external jugular vein and eventually the subclavian vein.

    Parotid Gland

    • The parotid gland is responsible for producing saliva.
    • The parotid gland is innervated by the facial nerve.
    • The primary method of treatment for parotid gland neoplasms is surgery.

    Arteries

    • The maxillary artery is the largest branch of the external carotid artery and can be found within the infratemporal fossa.
    • The middle meningeal artery is a branch of the maxillary artery and is of clinical importance due to its potential for bleeding in cases of skull fracture.
    • The infraorbital artery is the most important branch of the maxillary artery clinically.

    Muscles

    • The temporalis muscle is responsible for raising the eyebrows.
    • The muscles of mastication (temporalis, masseter, medial pterygoid, and lateral pterygoid) are responsible for elevating and moving the mandible.
    • The muscles of mastication are supplied by the mandibular nerve.
    • The lateral pterygoid muscle is responsible for elevation and side-to-side movement of the mandible.
    • The masseter muscle has its origin on the zygomatic bone and zygomatic arch.
    • The medial pterygoid muscle has two heads, with the deep head originating from the medial surface of the lateral pterygoid plate of the sphenoid bone, and the superficial head arising from the maxilla.
    • The lateral pterygoid muscle has two heads, with the upper head arising on the roof of the fossa and the lower head originating from the lateral surface of the lateral pterygoid plate.

    Other Structures

    • The pterygoid plexus is located in the infratemporal fossa.
    • The auriculotemporal branch of the mandibular nerve supplies the parotid gland and the skin of the ear.
    • The inferior alveolar nerve enters the mandible through the mandibular foramen.
    • The infratemporal fossa contains the maxillary artery, mandibular nerve, and pterygoid muscles.
    • The facial skeleton consists of the zygomatic bone, zygomatic arch, and ramus of the mandible.
    • The temporal and infratemporal fossa are important for studying the anatomy of the face and jaw.

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    DR 5 - Face, Temporal and Infratemporal Fossa PDF

    Description

    Test your knowledge on the anatomy of the face, temporal and infratemporal fossa, including the muscles and arteries involved. Learn about the horizontal orientation of muscle fibers and the significance of the maxillary artery.

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