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Structure and Function Test 1 > Infratemporal Fossa Pt. 1 > Flashcards

Infratemporal Fossa Pt. 1 Flashcards

1
Q

An irregularly-shaped space in the head that is surrounded by bone and soft tissues

A

Infratemporal fossa

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2
Q

The infratemporal fossa contains structures that are important for

A

Mastication, taste, and salivation

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3
Q

The infratemporal fossa is inferior to the

A

Zygomatic arch

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4
Q

The infratemporal fossa is deep/medial to the

A

Ramus of the mandible

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5
Q

The infratemporal fossa is lateral to the

A

Sphenoids lateral pterygoid plate

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6
Q

The infratemporal fossa is posterior to the

A

Maxilla

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7
Q

One of the regions where anesthesia may be administered by dentists for nerve blocks during work on mandibular teeth

A

Infratemporal fossa

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8
Q

Superior to the zygomatic arch and communicates with the infratemporal fossa through a gap between the zygomatic arch and cranial bones

A

Temporal fossa

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9
Q

The floor of the temporal fossa is formed by the

A

Sphenoid (gretaer wing), temporal (squamous portion), frontal, and parietal bones

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10
Q

The sutures that unite these bones forms the

A

H-shaped pterion

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11
Q

Fully occupies the temporal fossa and extends into the infratemporal fossa

-one of the four muscles of mastication

A

Fan-shaped temporalis muscle

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12
Q

Covers the temporalis and attaches to the zygomatic arch to provide resistance to the masseter that pulls down on the zygomatic arch

A

Tough facia

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13
Q

Located intracranially and medially to the infratemporal fossa

A

Middle cranial fossa

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14
Q

The Middle cranial fossa communicates with the infratemporal fossa through the

A

Foramen ovale and foramen spinosum

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15
Q

Openings in the intervening greater wing of the sphenoid bone that transmit neurovasculature

A

Foramen ovale and Foramen spinosum

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16
Q

The largest of three major paired salivary glands

-located in the posteriolateral part of the face

A

Parotid gland

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17
Q

Wedged within a region bounded by the zygomatic
arch (superiorly), external acoustic meatus-mastoid process-sternocleidomastoid (posteriorly), mandible ramus and masseter (anteromedially)

A

Parotid gland

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18
Q

Course through the parotid region

A

External carotid artery and retromandibular vein

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19
Q

Proceeds anteriorly and horizontally from the gland and turns medially at the masseters anterior border to pierce the buccinator

A

Parotid duct

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20
Q

The parotid duct pierces the buccinator and enters the oral cavity through an orifice located near the

A

2nd maxillary molar tooth

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21
Q

Course through the parotid gland on their way to supply the muscles of facial expression

A

Somatic motor branches of CN VII

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22
Q

The parotid gland and some lymph nodes are enclosed in a tough, unyielding fascia capsule known as the parotid sheath, which forms from the

A

Inversting layer of deep cervical fascia

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23
Q

Mumps virus may result in parotid gland inflammation known as

A

Paroditis

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24
Q

Swelling within the parotid sheath can cause pain during chewing and in the auricle and external aucoustic meatus that is relayed by

A

1.) Auriculotemporal nerve of CN V3, and the great auricular nerves (C2-C3)

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25
Q

Somatic (branchial) motor fibers of the facial nerve (CN VII), which course through the parotid gland, may
be injured from parotiditis or surgery and result in

A

Facial nerve (Bell’s) palsy

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26
Q

Facial nerve (Bel’s) palsy results in weakness or paralysis of

A

Facial muscles on ipsilateral side

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27
Q

Eversion of inferior eyelid, dry eye, tearing, impaired pronunciation of B, M, P, or W, and inability to whistle are symptoms of

A

CN VII (Bell’s) Palsy

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28
Q

In Bell’s palsy, the skin of the affected side may show

A

Irritation

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29
Q

Anterior and medial to the infratemporal fossa, with separation by muscles and mucosa

A

Oral cavity

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30
Q

Deep and medial to the infratemporal fossa

A

Pterygopalatine fossa

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31
Q

Allows passage of neurovascular structures between the infratemporal fossa and pterygopalatine fossa

A

Pterygomaxillary fissure

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32
Q

The parotid, temporal, and infratemporal regions include the

A

Tempromandibular joint (TMJ)

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33
Q

What produces the movement of the TMJ?

A

Muscles of mastication

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34
Q

What are the four muscles of mastication?

A

Temporalis, masseter, lateral pterygoid, and medial pterygoid

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35
Q

Which of the four muscles of mastication are located in the infratemporal fossa?

A

Inferior part of temporalis and the lateral and medial pterygoid

36
Q

The superior part of the temporalis is located in the

A

Temporal fossa

37
Q

The masseter is located

A

Lateral to the ramus of the mandible

-outisde of infratemporal fossa

38
Q

The muscles of mastication, tensor muscles, and some suprahyoid muscles are all derivatives of the first pharyngeal arch and are innervated by branches of the

A

Mandibular nerve (CN V3) which is located in the infratemporal fossa

39
Q

At the superior end of the jaw, immediately anterior to the ear/external acoustic meatus

A

Tempromandibular joint (TMJ)

40
Q

In the TMJ, the temporal’s madibular fossa receives the head of the

A

Condylar/condyloid process of the mandible

41
Q

The mandibular fossa is bound anteriorly by the

A

Articular tubercle

42
Q

The mandibular fossa is bound posteriorly by the

A

Postglenoid tubercle

43
Q

articular disc of the TMJ interposed between bones to create two separate joint cavities/spaces

A

Fibrocartilaginous meniscus

44
Q

Surrounds the TMJ and attaches to the temporal bone, neck of mandible’s condylar process, and the peripheral edges of the articular disc

A

Fibrous joint capsule

45
Q

The attachment of the edges of the articular disc
to the internal aspects of the capsule separates the articular surfaces and creates two separate (superior and inferior) joint cavities that are lined by

A

Synovial membranes

46
Q

Several types of mandibular movements are possible at the TMJ because it has

A

2 joint cavities

47
Q

What type of movements occur in the superior joint cavity>

A

Gliding movements (translation)

48
Q

The gliding movements of the mandible in the superior joint cavity allow themandible to

A
  1. ) Protrude/protract anteriorly

2. ) Retrude/retract posteriorly

49
Q

These gliding movements occur as the articular disc and condylar head glide together along the mandibular fossa up to the

A

Articular tubercle

50
Q

The prime mover in protrusion

A

Lateral pterygoid

51
Q

Prime mover in retrusion

A

Horizontal fibers of the temporalis

52
Q

What are the two types of movements that occur in the inferior joint cavity?

A
  1. ) Hinge movements (elevation/depression)

2. ) Rotation/spin along a vertical axis (lateral movements in grinding)

53
Q

When the mouth closes, what happens to the mandible?

A

Retracts and elevates

54
Q

When in a deep sleep, there is tonic contraction of retractor muscles and relaxation of elevator muscles causing

A

Mouth to open slightly

55
Q

For the mouth to open wide, the mandible is

A

Protruded and depressed

56
Q

The prime mover in depression of the mandible

A

Gravity

57
Q

Help depress the mandible against resistance

A

Platysma, suprahyoids, infrahyoids, and lateral pterygoid

58
Q

When one condyle of the mandable spins/rotates around a vertical axis and the contralateral condyle translates forward, we get a small degree of

A

Lateral movement of the mandible

59
Q

The lateral movements for grinding and chewing occure through the action of the

A

Masseter and temporalis of the same side and the pterygoids of the opposite side

60
Q

When protraction of the head and disc occurs unilaterally, the contralateral, retracted head rotates (pivots) on the inferior surface of the articular disc, permitting simple

A

Side-to-side grinding

61
Q

Sometimes during yawning or taking a large bite, excessive contraction of the lateral pterygoid may
cause the disc with heads of the mandible to cross the anterior tubercle of the TMJ, causing

A

TMJ dislocation (can’t close mouth)

-lock-jaw

62
Q

What resists posterior dislocation of the TMJ?

A

Postglenoid tubercle and ligaments

63
Q

Blows to the chin often result ina fracture of the

A

Neck of themandible

64
Q

Fracture of the mandibular condyle results in a unilateral lateral pterygoid function in which there is deviation of the jaw to the

A

Affected side

65
Q

The terminal branches of the external carotid artery are the

A

Superficial temporal and maxillary arteries

66
Q

The temporalis muscle is supplied by the

A

Superficial temporal artery and some muscular branches of the maxillary artery

67
Q

Originates within the parotid gland, near the neck of the mandible

A

Maxillary artery

68
Q

The maxillary artery enters the infratemporal fossa either lateral to or within the

A

Lateral pterygoid muscle

69
Q

Branches of the maxillary artery supply the

A

Dura matter of cranial cavity, nasal cavity, oral cavity, and all teeth

70
Q

The maxillary artery is divided into which three parts based on its relation to the lateral pterygoid muscle in the infratemporal fossa?

A
  1. ) Mandibular part
  2. ) Pterygoid part
  3. ) Pterygopalatine part
71
Q

Deep to the condyle of the mandible

-branches into middle meningeal artery and inferior alveolar artery

A

Mandibular (1st) part of maxillary artery

72
Q

Exits the infratemporal fossa by ascending vertically via the foramen spinosum to reach the middle cranial fossa of the cranial cavity to supply the dura and bone

A

Meningeal artery

73
Q

Passes between the two roots of the auriculotemporal nerve in the infratemporal fossa

A

Meningeal artery

74
Q

Travels with the inferior alveolar nerve of CN V3, descends to exit the infratemporal fossa via the mandibular foramen

A

Inferior Alveolar Artery

75
Q

The inferior alveolar artery eventually becomes the

A

Mental Artery (supplies the chin)

76
Q

Located lateral to or within the lateral pterygoid muscle

A

Pterygoid (2nd) part of maxillary artery

77
Q

Gives off numerous branches to the muscles of mastication

A

Pterygoid (2nd) part of maxillary artery

78
Q

Passes through pterygomaxillary fissue to exit from the infratemporal fossa and enter into the pterygopalatine fossa

A

Pterygopalatine (3rd) part of maxillary artery

79
Q

The pterygopalatine part of the maxillary artery branches into the

A
  1. ) Posterior superior alveolar artery
  2. ) Infraorbital artery
  3. ) Sphenopalatine artery
80
Q

Supplies maxillary teeth

A

Posterior superior alveolar artery

81
Q

Supplies part of the cheek

A

Infraorbital artery

82
Q

Supplies the nasal cavity

A

Sphenopalatine artery

83
Q

Lies between the temporalis and lateral pterygoid muscle in the infratemporal fossa

-Venous sequivalent of the maxillary artery

A

Pterygoid venous plexus

84
Q

The pterygoid venous plexus communicates anteriorly with the

A

Facial vein via Deep facial vein

85
Q

The ptrerygoid venous plexus communicates superiorly with the

A

Cavernous sinus (via emissary veins)

86
Q

The pterygoid venous plexus also has an indirect communication with the

A

Inferior opthalmic vein

87
Q

The pterygoid venous plexus also communicates

with the external jugular vein via the

A

Maxillary and retromandibular veins

Structure and Function Test 1 (61 decks)

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