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Sp24 - Head/Neck Anatomy > (E2) 3 - Muscles of Mastication > Flashcards

(E2) 3 - Muscles of Mastication Flashcards

Exam 2 - Schroeder

1
Q

Define Incision

A
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2
Q

Define Mastication

A
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3
Q

Define Deglutition

A

Swallowing

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4
Q

What are the 4 muscles of mastication?

A
  • masseter
  • temporalis
  • lateral pterygoid
  • medial pterygoid
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5
Q

What innervates the muscles of mastication?

A
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6
Q

Image of Jaw Movements

A
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7
Q

Masseter: Superior Head/Layer
- fiber course
- attachments
- innervation

A
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8
Q

Masseter: Middle Head/Layer
- attachments
- innervation

A
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9
Q

Masseter: Deep Head/Layer
- fiber course
- attachments
- innervation

A
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10
Q

Actions of Masseter Muscle

A
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11
Q

_______ nerve, artery, and vein course superior to mandibular notch to enter deep surface of the masseter muscle.

A

Masseteric

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12
Q

Where does the masseter muscle receive blood from? (3)

A
  • masseteric artery
  • transverse facial artery
  • facial artery
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13
Q

____ nerve, _____ artery and _____ are superficial to masseter muscle.

A
  • facial nerve branches
  • transverse facial artery
  • parotid duct
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14
Q

Mandibular attachment of ____ muscle is deep to masseter.

A

Temporalis

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15
Q

Temporalis:
- fiber course
- attachments
- innervation

A
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16
Q

What can be found superficial to the temporalis muscle? (7 things)

A
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17
Q

Temporoparietal fascia is_______ fascia
Contains ________ muscles

A
  • superficial
  • auricular
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18
Q

Temporal fascia is ________ fascia surrounding temporalis
Attaches to ____________

A
  • deep
  • superior temporal line
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19
Q

Superficial temporal space is between ____ & _______

A

fascia & temporalis

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20
Q

Deep temporal space is between ____ & _______

A

temporalis & skull

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21
Q

Deep temporal nerves course adjacent to _________

A

deep temporal arteries

22
Q

Middle temporal artery is a branch from _____

A

superficial temporal artery

23
Q

Anterior and posterior deep temporal nerves branch from ____________.

A

anterior division of mandibular nerve.

24
Q

Anterior and posterior deep temporal nerves course deep to __________

A

temporalis

25
Q

Anterior deep temporal nerve may
arise from common trunk with
____________ nerve and first pass
superficially over superior head of
___________ before coursing
deep to __________

A
  • long buccal
  • lateral pterygoid
  • temporalis
26
Q

Anterior and posterior deep temporal arteries branch from 2nd part of ___________

A

maxillary artery

27
Q

Anterior and posterior deep temporal arteries course deep to ________

A

temporalis

28
Q

____________ branches from superficial temporal artery superior to root of zygomatic arch

A

Middle temporal artery

29
Q

Middle temporal artery courses deep to _________ and superficial to ___________

A
  • temporal fascia
  • temporalis
30
Q

Actions of Temporalis

31
Q

What does the masticator compartment (space) contain?

32
Q

______ space is a subcompartment of the masticator compartment

A

Pterygomandibular space

33
Q

Pterygomandibular space is a physical space between ______ & __________

34
Q

_____ & __________ are both deep to the mandible, have 2 heads, and have their own same-named innervation

A

Medial and lateral pterygoids

35
Q

_________ pterygoid is more horizontal and superior

36
Q

Medal Pterygoid Attachments

37
Q

Medial Pterygoid Actions and Innervation

38
Q

Lateral Pterygoid: Superior Head attachments

39
Q

Lateral Pterygoid: Inferior Head Attachments

40
Q

Actions and Innervation of Lateral Pterygoid

41
Q

What is the Pterygomasseteric sling?

42
Q

Pterygomasseteric sling: Obliquity of sling permits ____ when other half of the sling is contralateral activated

43
Q

Right masseter and left medial pterygoid would result in lateral excursion to the _______ and a shearing effect

44
Q

Opening the mouth is done by the __________ muscles stabilizing the hyoid bone. The________ muscles and _________ head of the lateral pterygoid muscle then act synergistically to depress the mandible. The________ head of the lateral pterygoid is minimally activated at this time.

A
  • infrahyoid
  • suprahyoid
  • inferior
  • superior
45
Q

Closing the mouth is done by what 3 muscles?

A

medial pterygoid, masseter and temporalis

46
Q

The posterior fibers of the________ that are oriented
horizontally, retrude the mandible during closing the mouth.

A

temporalis

47
Q

The _________ is likely eccentrically activated during closing the mouth to control disc placement and retrusion force.

A

superior head of the lateral pterygoid

48
Q

Lateral excursion is performed by muscles on both sides of the head. Left lateral excursion is done by the_______ masseter and temporalis and______ pterygoid muscles.

A
  • ipsilateral
  • contralateral
49
Q

Left lateral excursion is done by the____
masseter & _____ temporalis and _____
medial pterygoid & _____ lateral pterygoid.

A
  • left
  • left
  • right
  • right
50
Q

Image - Stages of Mastication Cycle

A

( opening - the first phase is rotation, the second phase requires translation and rotation)

Sp24 - Head/Neck Anatomy (15 decks)

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