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

Lecture 8: Deep Face and Infratemporal Fossa Flashcards

1
Q

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

A

Temporal Fossa: Superior to Zymgomatic Arch

Infratemporal Fossa: Inferior to Zymgomatic Arch

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2
Q

What are the boundaries of the infratemporal fossa?

A
  • 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
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3
Q

What are the contents of the infratemporal fossa?

A

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
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4
Q

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

A
  • 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
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5
Q

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

A
  • Deep Temporal Artery
    • Supplies Temporalis Muscle
  • Pterygoid Branches
    • Supplies Pterygoid Muscle
  • Masseteric Artery
    • Supplies TMJ and Masseter Muscle
  • Buccal Artery
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6
Q

What nerves make up the sensory part of Mandibular Nerve?

A
  • Buccal Nerve
  • Lingual Nerve
  • Inferior Alveolar
    • Dental Nerve
    • Incisive Nerve
    • Mental Nerve
  • Auriculotemporal Nerve
  • Meningeal Nerve
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7
Q

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

A
  • 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
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8
Q

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?

A

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.

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9
Q

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

A

Trigeminal N.

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10
Q

What foramen does the inferior alveolar N. enter?

A

The mandibular foramen

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11
Q

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

A

The parotid gland

Less petrosal nerve synapses at ganglion

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12
Q

Where can we find the otic ganglion?

A

Posterior and inferior to V3 as it exits the foramen ovale

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13
Q

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

A

Branches of the Maxillary Artery

Examples: Deep Auricular and Anterior Tympanic

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14
Q

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

A

Inferior Alveolar Artery and Nerve

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15
Q

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

A

Not much

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16
Q

What are the muscles of mastication?

Including Accessory

A

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
Q

What muscles are responsible for the protraction of the jaw?

A

Masseter Muscle

Lateral Pterygoid Muscle

Medial Pterygoid Muscle

18
Q

What muscles are responsible for “retrusion” of the mandible?

A

Masseter M.

Temporalis M.

19
Q

What muscles are responsible for elevation of the jaw?

A

Temporalis Muscle

Masseter Muscle

Medial pterygoid Muscle

20
Q

What muscles are responsible for depression of the jaw?

A

Suprahyoid Muscles

Infrahyoid Muscles

Lateral Pterygoid Muscle

21
Q

What muscles open the jaw?

A
  • Lateral Pterygoid Muscle

Suprahyoid Muscles

  • Geniohyoid Muscle
  • Mylohyoid Muscle
  • Stylohyoid Muscle
  • Digrastric Muscle
22
Q

What muscles close the jaw?

A
  • Medial Pterygoid Muscle
  • Temporalis Muscle
  • Masseter Muscle
23
Q

What muscles are responsible for lateral movements of the jaw?

A

Ipsilateral: Temporalis Muslce and Masseter Muscle

Contralateral: Pterygoid Muscles

24
Q

What muscles help with swallowing and stablizing hyoid bone?

A

Infrahyoid Muscles

  • Sternohyoid Muscle
  • Sternothyroid Muscle
  • Thyrohyoid Muslce
  • Omohyoid Muscle
25
Q

What action do the stylomandibular and sphenomandibular ligament prevent?

A

Excess anterior protrusion of TMJ

26
Q

What four ligaments hold the TMJ together?

A

Joint capsule

Sylomandibular Ligament

Sphenomandibular Ligament

Lateral temporomandibular Ligament

27
Q

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

A

Superior Head of the Lateral Pterygoid Muscle

28
Q

At what angle is the TMJ dislocated anteriorly?

A

>15 degrees

29
Q

What nerves supply the TMJ?

A

Auriculotemporal Nerve (posterior branch)

Posterior Deep Temporal Nerve

Masseteric Nerve

30
Q

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

A

Just at the exit of the infraorbital foramen.

The infraorbital nerve must be blocked.

31
Q

Where are the injection sites for the posterior and middle superior alveolar nerve blocks?

A

By the molars for posterior, and by the premolars for middle.

32
Q

Where is the injection site for the inferior posterior alveolar nerve?

A

Just inferior and lateral to the pterygomandibular raphe.

(The pterygomandibular raphe is the junction of the buccinator and the superior pharyngeal constrictor Ms.)

33
Q

Dental nerve blocks target what nerves?

A

Anterior and middle superior alveolar nerve

Posterior Superior alveolar nerve

Year 1: 05. Neuro Exam 1 (26 decks)

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