Lecture 8: Deep Face and Infratemporal Fossa Flashcards Preview

Year 1: 05. Neuro Exam 1 > Lecture 8: Deep Face and Infratemporal Fossa > Flashcards

Flashcards in Lecture 8: Deep Face and Infratemporal Fossa Deck (33)
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1

In comparision to the zymgomatic arch, where is the temporal and infratemporal fossa found?

Temporal Fossa: Superior to Zymgomatic Arch

Infratemporal Fossa: Inferior to Zymgomatic Arch

2

What are the boundaries of the infratemporal fossa?

  • Roof: Greater Wing of Sphenoid
  • Anterior: Maxilla Bone
  • Posterior: Tympanic Plate, Mastoid Process, and Styloid Process
  • Lateral: Ramus of Mandible
  • Medial: Lateral Pterygoid Plate
  • Inferior: Angle of Mandible 

3

What are the contents of the infratemporal fossa?

Muscles

  • Inferior portion of Temporalis Muscle
  • Lateral and Medial Pterygoid Muscles

Vasculature

  • Maxillay Artery
  • Pterygoid Venous plexus

Nervous Structures 

  • Inferior Alveolar Nerve of V3: goes to mandible
  • Lingual Nerve of V3: sensation of anterior tongue
  • Buccal Nerve of V3: sensation to cheek
  • Auricolotemporal Nerve of V3: sensation to parotid gland
  • Otic Ganglion: parotid gland 
  • Chorda Tympani of VII: taste of anterior tongue and paraysmpathetic innervation to submandibular and sublingual glands

4

What are the branches of the mandibular portion of the Maxillary Artery?

  • Deep Auricular Artery
    • Supplies external acoustic meatus and tympanic membrane and TMJ
  • Anterior Tympanic Artery
    • Supplies internal tympanic membrane
  • Inferior Alveolar Artery: supplies mandible
    • Mylohyoid Artery
    • Mental Artery
  • Middle Meningeal Artery
  • Accessory Menigneal Artery
    • Supplies extracranial muscles of infratemporal fossa, otic ganglion, and sphenoid bone

5

What are the branches of the pterygoid portion of the Maxillary Artery?

  • Deep Temporal Artery
    • Supplies Temporalis Muscle
  • Pterygoid Branches
    • Supplies Pterygoid Muscle
  • Masseteric Artery
    • Supplies TMJ and Masseter Muscle
  • Buccal Artery

6

What nerves make up the sensory part of Mandibular Nerve?

  • Buccal Nerve
  • Lingual Nerve
  • Inferior Alveolar
    • Dental Nerve
    • Incisive Nerve
    • Mental Nerve
  • Auriculotemporal Nerve
  • Meningeal Nerve

7

What are all the targets of the motor part of Mandibular Nerve?

  • Muscles of Mastication
    • Temporalis Muslce
    • Masseter Muscle
    • Lateral Pterygoid Muscles
    • Medial Pterygoid Muscles
      • Tensor Veli Palatini
      • Tensory Tympani
  • Deep Temporal Muscle
  • Mylohyoid Muscle
  • Anterior Belly of Digastric Muscle

8

What is the function of the buccal N. from the mandibular branch of the trigeminal?

 

What is the funciton of the buccal branch of the facial nerve?

Buccal nerve from V3 provides sensation to the interior cheek and part of the gums.

 

The buccal branch of the facial nerve provides motor innervation to the buccinator muscle.

9

The "tensor" muscles of the face are innervated by which cranial nerve?

Trigeminal N.

10

What foramen does the inferior alveolar N. enter?

The mandibular foramen

11

What do the cell bodies of the otic ganglion ultimately serve?

The parotid gland

Less petrosal nerve synapses at ganglion 

12

Where can we find the otic ganglion?

Posterior and inferior to V3 as it exits the foramen ovale

13

Fracture high on the neck of the mandible can interfere with what structures?

Branches of the Maxillary Artery

Examples: Deep Auricular and Anterior Tympanic 

 

14

 A fracture of the ramus of the mandible can damage what structures?

Inferior Alveolar Artery and Nerve

15

 A fracture of the corpus of the mandible can damage what structures?

Not much

16

What are the muscles of mastication?

Including Accessory

Main Muscles: Innervated by V3

  • Temporalis Muslce
  • Masseter Muscle
  • Lateral Pterygoid Muscle
  • Medial Pterygoid Muscle

Accessory Muscles: Innervated by VII

  • Buccinator Muscle
  • Orbiculais Oris Muscle

17

What muscles are responsible for the protraction of the jaw?

Masseter Muscle

Lateral Pterygoid Muscle

Medial Pterygoid Muscle

18

What muscles are responsible for "retrusion" of the mandible?

Masseter M.

Temporalis M.

19

What muscles are responsible for elevation of the jaw?

Temporalis Muscle

Masseter Muscle

Medial pterygoid Muscle

20

What muscles are responsible for depression of the jaw?

Suprahyoid Muscles

Infrahyoid Muscles

Lateral Pterygoid Muscle

21

What muscles open the jaw?

  • Lateral Pterygoid Muscle

Suprahyoid Muscles

  • Geniohyoid Muscle
  • Mylohyoid Muscle
  • Stylohyoid Muscle
  • Digrastric Muscle

22

What muscles close the jaw?

  • Medial Pterygoid Muscle
  • Temporalis Muscle
  • Masseter Muscle

 

23

What muscles are responsible for lateral movements of the jaw?

Ipsilateral: Temporalis Muslce and Masseter Muscle

Contralateral: Pterygoid Muscles

24

What muscles help with swallowing and stablizing hyoid bone?

Infrahyoid Muscles

  • Sternohyoid Muscle
  • Sternothyroid Muscle
  • Thyrohyoid Muslce
  • Omohyoid Muscle

25

What action do the stylomandibular and sphenomandibular ligament prevent?

Excess anterior protrusion of TMJ

26

What four ligaments hold the TMJ together?

Joint capsule

Sylomandibular Ligament

Sphenomandibular Ligament

Lateral temporomandibular Ligament

27

What pulls the articular disc of the TMJ forward during wide jaw opening?

Superior Head of the Lateral Pterygoid Muscle

28

At what angle is the TMJ dislocated anteriorly?

>15 degrees

29

What nerves supply the TMJ?

Auriculotemporal Nerve (posterior branch)

Posterior Deep Temporal Nerve

Masseteric Nerve

30

Where is the injection site for the Anterior Superior Alveolar Nerve?

Just at the exit of the infraorbital foramen.

The infraorbital nerve must be blocked.