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s1b4: anatomy > Infratemporal Region > Flashcards

Infratemporal Region Flashcards

1
Q

What are the boundaries of the infratemporal region?

A
  • Greater wing of sphenoid
  • lateral plate of the pterygoid process
  • posterior surface of the maxilla
  • styloid process
  • ramus of the mandible
  • soft palate muscles
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2
Q

Identify the indicated boundaries of the inratemporal space

A
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3
Q

Name the indicated features associated with the pterygopalatine fissure.

A
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4
Q

What part of the maxillary passes deep to the neck of the mandicle? What is the name of this part? What branches are given off by this part and how do they exit?

A

1st part

Mandibular part

They exit through foramina

  1. Deep auricular
    1. to external ear canal
  2. Anterior tympanic
    1. through petrotympanic fissue to get to inner ear region
  3. Inferior alveolar
    1. descending to teeth– goe inside the mandible
  4. middle meningeal
    1. enter foramen spinosum
    2. runs on interior of skull, feeds the dura mater
    3. runs on inside of pterion
  5. accessory meningeal
    1. trhough foramen ovale through trigeminal derivitive, mandibular nerve
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5
Q

What part of the maxillary passes superficial, deep, or though the lateral pterygoid muscle? What is the name of this part? What branches are given off by this part and how do they exit?

A

2nd part

muscular part

muscular branches

  1. Masseter
    1. over mandible to depe surface of masseter
  2. Buccal
    1. facial muscle
    2. cheek region around buccinator
  3. Deep temporal (set going superior)
    1. deep surface termporalis muscle
  4. Medial pterygoid artery
    1. feed the medial pterygoid
  5. Lateral prerygoid artery
    1. feeds latral pretygoid
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6
Q

What structure does the 3rd part of the maxillary artery pass through?

What is the important branch off of this segment, supplying facial structures?

A

pterygomaxillary fissure to get into the pterygopalatine fossa

  1. Posterior superior alveolar arteries
    1. posterio portion of maxilla, to teeth
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7
Q

Identify the indicated branches and structures related to the first part of the maxillary artery.

A
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8
Q

Identify the branches of the maxillary artery

A
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9
Q

What structure do emissary veins form?

Where do they drain to?

Why is infection a concern in this region?

A

They form a plexus in the infratemporal region

They drain into the internal and external jugular veins

they communicate with the cavernous sinus, therefore it is possible for them to allow an infection into the brain

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10
Q

What structure is formed at the trifucation of the trigeminal nerve? What are the 3 branches that it forms?

A

the trigeminal ganglia

  • opthalmic
  • maxillary
  • mandibuial
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11
Q

Identify the sensory branches of the mandibular nerve. What structure does the mandibular nerve descend through?

A

foramen ovale

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12
Q

What portion of somatic sensation tongue is provided by the lingual nerve? What nerve is the lingual nerve a branch of? What two muscles does it run between?

A

anterior 2/3

Mandibular nerve (V3)

between the medial and lateral pterygoid muscles

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13
Q

Describe the route of the chorda tympani.

A

The chorda tympani is a nerve branch of the facial nerve (CNVII) that courses over the tympanic membrane, exits through the petrotympanic fissure to connect with the lingual nerve at the level of the inferior border of the lateral pterygoid on route to the floor of the oral cavity.

chorda tympani provides parasympathetic innervation to the submandibular and sublingual nerves as well as taste to the anterior tongue

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14
Q

What nerve interfaces with the submandibular ganglion? What structures does this ganglions control?

A

The chorda tympani, hitching a ride with the lingual nerve, interfaces with the submandibular ganglion to provide parasympathetic information. The submadivular ganglion sends out information regarding salivation to both the submadibular gland and sublingual nerve.

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15
Q
  1. What would be the impact of a lesion of the lingual nerve before it merges with the chondra tympani?
  2. What would be the impact of a lesion in the inner ear?
  3. What would be the impact of a lesion on the lingual nerve in the mandible?
A
  1. loss of somatic sensaion of the anterio 2/3 of the tongue (taste and salvation in tact)
  2. loss of taste to the anterior 2/3 of the tongue, loss of salication from the submandibular and sublingual glands (perhaps not noticible b/c parotid still in tact)–somatic sensation in tact
  3. loss of somatic sensation and taste to the anterior 2/3 of the tongue as well as salvation from the submandibular and sublingual nerves
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16
Q

What branch is given off of the inferior alveolar nerve before it enters the canal in the mandible?

A

nerve to the mylohyoid

  • muscular innervation to the mylohyoid and anterio belly of digastric
17
Q

Which neurovascular bundle enters the mandibular foramen? What is the innervation patter of the nerve contained within this canal?

A

inferior alveolar nerve, artery and vein

the inferior alveolar nerve provides senosory innervation to the side of the mouth, teeth, gums. – its the nerve dentists numb when doing a procedure.

18
Q

Which nerve branch is first produced by 2 branches that merge together, making a loop behind the TMJ. Which nerve passes through this loop?

Where is the origin of these nerve fibers?

A

Auricular temporal nerve

middle meningeal passes through

The glossopharyngeal nerve gives off a branch that travels through the middle ear, the tympanic nerve. Coming out of the inner ear cavity, the nerve is called the lesser petrosal nerve, which synapses with the otic ganglion (superior portion of V3). Post ganglionic fibers follow auricular temporal to provide function to the parotid gland.

19
Q

What type of sympathetic control is sent to the parotid gland?

A

vascular– reducing the blood that goes there will reduce the amount of saliva it produces

20
Q

Identify the branches of the mandibular nerve

A

s1b4: anatomy (6 decks)

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