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head and neck anatomy > tmj & muscles of mastication > Flashcards

tmj & muscles of mastication Flashcards

1
Q

muscles of mastication

A
  • temporalis
  • masseter
  • medial pterygoid
  • lateral pterygoid
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2
Q

temporalis muscle

A
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3
Q

masseter muscle

A
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4
Q

medial pterygoid muscle

A
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5
Q

lateral pterygoid muscle

A
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6
Q

accessory muscles of mastication

A
  • digastric
  • mylohyoid
  • geniohyoid
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7
Q

digastric muscle (location and role)

A
  • stabilizes the hyoid during swallowing (protects the airway while eating)
  • depress the mandible
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8
Q

mylohyoid muscle (location and role)

A
  • elevate hyoid bone, oral cavity, and tongue
  • depress the mandible
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9
Q

geniohyoid muscle (location and role)

A
  • pull hyoid bone and larynx up and forward during swallowing
  • depress the mandible
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10
Q

mastication neurovasulature (arteries)

A
  • medial and lateral pterygoid arteries
  • masseteric artery
  • anterior and posterior deep temporal arteries
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11
Q

mastication neurovasulature (veins)

A
  • pterygoid plexus of veins
  • maxillary vein
  • superficial temporal vein
  • retromandibular vein
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12
Q

which main nerve innervates the mastication muscles

A

mandibular nerve (CN V3)

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13
Q

what is the clinical significance of the pterygoid plexus of veins

A
  • communication with the cavernous sinus, the inferior ophthalmic vein, and the facial vein
  • potential to spread infection through the venous system into the cranial cavity
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14
Q

branches of the mandibular division of the trigenminal nerve

A

anterior:
- buccal nerve
- masseteric nerve
- deep temporal nerves
- nerve to lateral pterygoid muscle

posterior:
- auriculotemporal nerve
- lingual nerve
- inferior alveolar nerve → nerve to mylohyoid muscle → muscular branch to anterior belly of digastric muscle

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15
Q

temporalis muscle nerve innervation

A

deep temporal branches of the mandibular nerve

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16
Q

masseter muscle nerve innervation

A

masseteric nerve branch of the mandibular nerve

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17
Q

medial pterygoid muscle nerve innervation

A

medial pterygoid branch of the mandibular nerve

18
Q

lateral pterygoid muscle nerve innervation

A

lateral pterygoid branch of the mandibular nerve

19
Q

tmj features

A
  • mandibular fossa
  • mandibular notch
  • articular tubercle
  • articular eminence
  • condylar process of mandible
  • head, neck, ramus, angle, and body of mandible
  • pterygoid fovea
  • mandibular foramen
  • zygomatic arch
20
Q

mandibular fossa

21
Q

mandibular notch

22
Q

articular tubercle

23
Q

articular eminence

24
Q

condylar process of mandible

25
Q

head, neck, ramus, angle, and body of mandible

26
Q

pterygoid fovea

27
Q

mandibular foramen

28
Q

zygomatic arch

29
Q

tmj classification

A

synovial, condylar and hinge-type joint

30
Q

tmj components

A
  • joint capsule
  • articular disc
  • mandibular condyles
  • articular surface of the temporal bone
  • temporomandibular ligament
  • stylomandibular ligament
  • sphenomandibular ligament
  • lateral pterygoid muscle
31
Q

joint capsule

32
Q

lateral temporomandibular ligament

33
Q

stylomandibular ligament

34
Q

sphenomandibular ligament

35
Q

what muscles are responsible for elevation of the mandible

A
  • masseter muscle
  • medial pterygoid muscle
  • temporalis muscle
36
Q

what muscles are responsible for depression of the mandible

A

lateral pterygoid muscle

37
Q

what muscles are responsible for protrusion of the mandible

A
  • masseter muscle
  • medial pterygoid muscle
  • lateral pterygoid muscle
38
Q

what muscles are responsible for retraction of the mandible

A
  • masseter muscle
  • temporalis muscle
39
Q

what muscles are responsible for rotation of the mandible

A
  • medial pterygoid
  • lateral pterygoid
40
Q

tmj ligaments

A
  • joint capsule
  • lateral temporomandibular ligament
  • sphenomandibular ligament
  • stylomandibular ligament

head and neck anatomy (11 decks)

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