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809 - Exam Block 2 > Infratemporal Fossa - Herring > Flashcards

Infratemporal Fossa - Herring Flashcards

1
Q

The temporal fossa is filled by the _______ and what line does it actually attach to?

A

temporalis muscle ; inferior temporal line

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2
Q

The _____ ligament of TMJ resists lateral dislocation

A

lateral

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3
Q

The articular disc of TMJ is a biconcave disc that is thickened _______ and ______

A

posteriorly and anteriorly

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4
Q

The superior compartment of the TMJ has what kind of movement

A

Gliding (translation)

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5
Q

The inferior compartment of the TMJ has what kind of movements

A

Elevation

Depression

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6
Q

4 Movements of TMJ

A

Gliding
- protrusion
Depression
Elevation
Gliding
- retrusion

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7
Q

What ligament of TMJ provides primary passive support

A

Sphenomandibular ligament

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8
Q

What is located between articular disc and the posterior osseous structures (aka between TMJ and ear)

A

Retrodiscal pad (tissue)

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9
Q

Primary neurovascular supply of TMJ

A

Auriculotemporal nerve

Superficial temporal a. THIS IS MAIN BLOOD SUPPLY OF TMJ

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10
Q

anterior surface of the TMJ is innervated by what 2 things

A

N. to masseter

Muscular branches of maxillary a.

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11
Q

muscles of mastication are all innervated by CN ______ and all produce movement at ____

A

CN V3 ; TMJ

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12
Q

Bilateral movement of temporalis muscle –> anterior fibers

A

Resting tonus

Elevation of mandible

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13
Q

Bilateral movement of temporalis muscle –> posterior fibers

A

Retraction/retrusion of mandible

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14
Q

Unilateral action of temporalis muscle =

A

Ipsilateral excursion of mandible

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15
Q

Bilateral movements of masseter muscle

A

Elevation of mandible

Protrusion (superficial)

Retrusion (deep)

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16
Q

Unilateral movements of masseter muscle

A

Ipsilateral excursion

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17
Q

Lateral pterygoid muscle (appears almost horizontal) - Bilateral movements - inferior heads

A

Protrusion & depression

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18
Q

Lateral pterygoid muscle - Bilateral movements - Superior heads

A

Elevation against resistance

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19
Q

Lateral pterygoid muscle - Unilateral movements

A

contralateral excursion

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20
Q

Medial pterygoid muscle - Bilateral movements

A

Elevation of mandible

Protrusion

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21
Q

Medial pterygoid muscle - Unilateral movements

A

Contralateral excursion

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22
Q

Elevation of Mandible Muscles (3):

A

Temporalis
Masseter
Medial Pterygoid

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23
Q

Depression of Mandible Muscles

A

Gravity **mostly **
Lateral pterygoid
- Inferior heads

these 3 are only engaged if against resistance
Suprahyoid mm.
Infrahyoid mm.
Platysma

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24
Q

Protrusion of Mandible Muscles

A

Masseter
- Superficial fibers
Lateral Pterygoid
Medial Pterygoid

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25
Q

Retrusion of Mandible Muscles

A

Temporalis
- Posterior fibers
Masseter
- Deep fibers
Digastrics
Geniohyoid

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26
Q

Right Lateral Movements Muscles

A

Left lateral pterygoid
Left medial pterygoid
Right temporalis
Right masseter

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27
Q

Left Lateral Movements Muscles

A

Right lateral pterygoid
Right medial pterygoid
Left temporalis
Left masseter

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28
Q

Risks of Temporalis Muscle + Botox

A

Difficulty chewing
- Especially if combined with masseter muscle botox therapy

Brow ptosis
Upper eyelid ptosis
Diplopia

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29
Q

Risks Pterygoid Muscles + Botox

A

Injection into vascular structures

Dysphonia (medial pterygoid)

Dysphagia (medial pterygoid)

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30
Q

1st part of Maxillary Artery

A

deep to neck of mandible

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31
Q

2nd part of Maxillary Artery

A

lateral pterygoid muscle

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32
Q

3rd part of Maxillary Artery

A

pterygopalatine fossa

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33
Q

All branches of 1st part – Mandibular portion of maxillary artery go into
_____

A

bone

34
Q

All branches of 2nd part – pterygoid portion of maxillary artery supply ______

A

muscles

35
Q

All branches of 3rd part pterygopalatine fossa of maxillary artery are located near or within the _____________

A

pterygopalatine fossa

36
Q

CN V3 exits the foramen ovale and gives off

A

Meningeal branch

Nerve to medial pterygoid

Nerve to tensor tympani

37
Q

As CN V3 exits the foramen ovale, it gives off 3 things and then divides into

A

Anterior Division (smaller)
Posterior Division (larger)

38
Q

The anterior division of CN V3 is a _____ root with 1 sensory nerve

A

motor

39
Q

The posterior division of CN V3 is a _____ root with 1 motor nerve

A

sensory

40
Q

CN V3 motor branches - muscles of mastication =

A

Deep temporal nerves

Masseteric nerve

N. to lateral pterygoid

N. to medial pterygoid

41
Q

CN V3 - sensory

A

TMJ

Anterior ear

Temporal region

42
Q

CN V3 post-ganglionic parasympathetic fibers (from otic ganglion) hitch a ride to the ____________

A

parotid gland

43
Q

CN V3 - Long buccal nerve - Sensory

A

Skin over cheek

Mucosa of cheek

Buccal surface of mandibular molar gingiva

44
Q

CN V3 - lingual nerve - sensory

A

Anterior 2/3rd tongue

Mucosa of floor of mouth

Mandibular lingual gingivae

45
Q

Pre-ganglionic parasympathetic fibers of the lingual nerve - chorda tympani - hitch a ride and then synapse at the

A

submandibular ganglion

46
Q

Pre-ganglionic parasympathetic fibers of the lingual nerve - chorda tympani - synapse at the submandibular ganglion and supply what glands

A

submandibular & sublingual glands

47
Q

Taste fibers from the ________ 2/3rds of the tongue hitch a ride (lingual nerve - chorda tympani)

A

anterior

48
Q

Once the IAN is in the mandibular canal, what is formed

A

inferior dental plexus

49
Q

Sensory from skin &
mucous membranes of lower lip & skin of the chin, vestibular gingiva of mandibular incisors, canine, & premolars (variable)

A

Mental nerve (terminal branch of IAN)

50
Q

Sensory innervation from incisors, canine, & 1st premolar (variable)

A

Incisive nerve (terminal branch of IAN)

51
Q

What’s anesthetized?

Mandibular teeth

Buccal / vestibular gingiva of the mandibular premolars, canine, & incisors

A

Inferior alveolar nerve

52
Q

What’s anesthetized?

Tongue

Lingual gingivae

A

Lingual nerve

53
Q

What’s anesthetized?

Buccal gingiva of the mandibular molars

A

Long buccal nerve block

54
Q

The otic ganglion pathway

Lesser petrosal nerve of CN IX has what kind of fibers

A

Preganglionic parasympathetic

55
Q

The postganglionic parasympathetic fibers of the lesser petrosal nerve synapse on the _________ ganglion and hitch a ride on _______ to innervate the ___________

A

otic ; CN V3 ; parotid gland

56
Q

the chorda tympani nerve is a branch of CN VII that branches after the ________ ganglion

A

geniculate

57
Q

the chorda tympani nerve is a branch of CN VII that leaves through the petrotympanic fissure and hitches a ride on the ________ nerve

A

lingual

58
Q

The chorda tympani nerve has 2 types of fibers, what are they

A

Preganglionic parasympathetic
Afferent taste fibers

59
Q

The preganglionic parasympathetic fibers of the chorda tympani nerve synapse at the ____________ ganglion

A

submandibular

60
Q

The preganglionic parasympathetic fibers of the chorda tympani nerve synapse at the submandibular ganglion, some fibers leave and immediately enter the __________ gland

A

submandibular

61
Q

The preganglionic parasympathetic fibers of the chorda tympani nerve synapse at the submandibular ganglion, some fibers leave and immediately enter the submandibular gland, other postganglionic parasympathetic fibers hitch a ride on the ________ nerve to reach the __________ glands

A

lingual ; sublingual

62
Q

the afferent taste fibers of the chorda tympani nerve are involved in what potion of the tongue

A

anterior 2/3rd tongue

63
Q

Lingual nerve immediately distal to the foramen ovale has ___________ fibers only

A

somatic sensory

64
Q

Lingual nerve immediately distal to the foramen ovale has somatic sensory fibers only and a lesion would present what signs/symptoms

A

Abnormal pain, temp, & touch sensation from the ipsilateral floor of the mouth, mandibular lingual gingivae, & anterior 2/3rd tongue

65
Q

Chorda tympani nerve in the middle ear or at / immediately distal to the petrotympanic fissure has what kind of fibers

A

Preganglionic parasympathetic and taste fibers

66
Q

Chorda tympani nerve in the middle ear or at / immediately distal to the petrotympanic fissure and a lesion would present what signs/symptoms

A

Abnormal taste sensations from ipsilateral anterior 2/3rd tongue

67
Q

LESION: Lingual nerve as it travels between medial pterygoid muscle & the mandible to the 3rd mandibular molar

A

Somatic sensory, preganglionic
parasympathetic, & taste fibers

Abnormal pain, temp, & touch
sensation from the ipsilateral floor
of the mouth, mandibular lingual
gingivae, & anterior 2/3rd tongue

Abnormal taste sensations from
ipsilateral anterior 2/3rd tongue

(variable) dry mouth due to loss of
innervation to the ipsilateral
submandibular & sublingual glands

68
Q

LESION: Lingual nerve as it travels along the floor of the mouth

A

Somatic sensory, POSTganglionic
parasympathetic, & taste fibers

Abnormal pain, temp, & touch
sensation from the ipsilateral floor
of the mouth, mandibular lingual
gingivae, & anterior 2/3rd tongue

Abnormal taste sensations from
ipsilateral anterior 2/3rd tongue

Even less likely to experience dry
mouth due to loss of innervation
only to the ipsilateral sublingual
glands

69
Q

Posterior Superior Alveolar Nerves CN V2 - originate in

A

pterygopalatine fossa

70
Q

Posterior Superior Alveolar Nerves CN V2 - enters the

A

posterior superior alveolar foramina

71
Q

Posterior Superior Alveolar Nerves CN V2 - supplies the

A

posterior maxillary molars

72
Q

Contents of the infratemporal fossa (8 things)

A

temporalis muscle
lateral pterygoid muscle
medial pterygoid muscle
maxillary artery
pterygoid venous plexus
CN V3 branches
chorda tympani (CN VII)
Otic ganglion

73
Q

What is the inferior articulating surface of the TMJ

A

mandibular condyle/head

74
Q

What are the 2 superior articulating surfaces of the TMJ

A

articular tubercle/eminence of temporal bone

mandibular fossa of temporal bone

75
Q

The retrodiscal pad (tissue) is extremely well vascularized and innervated by CN _____

A

V3

76
Q

Risks of Masseter Muscle + Botox

A

Asymmetrical smile
- Injection too medial or shallow

Dry mouth
- Injection too lateral / anatomical variation

Paradoxical masseter bulging
- Poor diffusion

77
Q

3 arteries from the 1st part of the maxillary artery (called the mandibular portion)

A

Middle Meningeal A
Accessory Middle Meningeal A
Inferior Alveolar A

78
Q

MMA ______ into the foramen spinosum

A

ascends

79
Q

Inferior alveolar artery ________ into the mandibular foramen

A

descends

80
Q

Long buccal nerve does NOT innervate the _______ muscle

A

buccinator

81
Q

The inferior dental plexus is responsible for sensory from

A

mandibular teeth

809 - Exam Block 2 (14 decks)

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