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

Infratemporal Fossa - Herring Flashcards

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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
Retrusion of Mandible Muscles
Temporalis - Posterior fibers Masseter - Deep fibers Digastrics Geniohyoid
26
Right Lateral Movements Muscles
Left lateral pterygoid Left medial pterygoid Right temporalis Right masseter
27
Left Lateral Movements Muscles
Right lateral pterygoid Right medial pterygoid Left temporalis Left masseter
28
Risks of Temporalis Muscle + Botox
Difficulty chewing - Especially if combined with masseter muscle botox therapy Brow ptosis Upper eyelid ptosis Diplopia
29
Risks Pterygoid Muscles + Botox
Injection into vascular structures Dysphonia (medial pterygoid) Dysphagia (medial pterygoid)
30
1st part of Maxillary Artery
deep to neck of mandible
31
2nd part of Maxillary Artery
lateral pterygoid muscle
32
3rd part of Maxillary Artery
pterygopalatine fossa
33
All branches of 1st part – Mandibular portion of maxillary artery go into _____
bone
34
All branches of 2nd part – pterygoid portion of maxillary artery supply ______
muscles
35
All branches of 3rd part pterygopalatine fossa of maxillary artery are located near or within the _____________
pterygopalatine fossa
36
CN V3 exits the foramen ovale and gives off
Meningeal branch Nerve to medial pterygoid Nerve to tensor tympani
37
As CN V3 exits the foramen ovale, it gives off 3 things and then divides into
Anterior Division (smaller) Posterior Division (larger)
38
The anterior division of CN V3 is a _____ root with 1 sensory nerve
motor
39
The posterior division of CN V3 is a _____ root with 1 motor nerve
sensory
40
CN V3 motor branches - muscles of mastication =
Deep temporal nerves Masseteric nerve N. to lateral pterygoid N. to medial pterygoid
41
CN V3 - sensory
TMJ Anterior ear Temporal region
42
CN V3 post-ganglionic parasympathetic fibers (from otic ganglion) hitch a ride to the ____________
parotid gland
43
CN V3 - Long buccal nerve - Sensory
Skin over cheek Mucosa of cheek Buccal surface of mandibular molar gingiva
44
CN V3 - lingual nerve - sensory
Anterior 2/3rd tongue Mucosa of floor of mouth Mandibular lingual gingivae
45
Pre-ganglionic parasympathetic fibers of the lingual nerve - chorda tympani - hitch a ride and then synapse at the
submandibular ganglion
46
Pre-ganglionic parasympathetic fibers of the lingual nerve - chorda tympani - synapse at the submandibular ganglion and supply what glands
submandibular & sublingual glands
47
Taste fibers from the ________ 2/3rds of the tongue hitch a ride (lingual nerve - chorda tympani)
anterior
48
Once the IAN is in the mandibular canal, what is formed
inferior dental plexus
49
Sensory from skin & mucous membranes of lower lip & skin of the chin, vestibular gingiva of mandibular incisors, canine, & premolars (variable)
Mental nerve (terminal branch of IAN)
50
Sensory innervation from incisors, canine, & 1st premolar (variable)
Incisive nerve (terminal branch of IAN)
51
What’s anesthetized? Mandibular teeth Buccal / vestibular gingiva of the mandibular premolars, canine, & incisors
Inferior alveolar nerve
52
What’s anesthetized? Tongue Lingual gingivae
Lingual nerve
53
What’s anesthetized? Buccal gingiva of the mandibular molars
Long buccal nerve block
54
The otic ganglion pathway Lesser petrosal nerve of CN IX has what kind of fibers
Preganglionic parasympathetic
55
The postganglionic parasympathetic fibers of the lesser petrosal nerve synapse on the _________ ganglion and hitch a ride on _______ to innervate the ___________
otic ; CN V3 ; parotid gland
56
the chorda tympani nerve is a branch of CN VII that branches after the ________ ganglion
geniculate
57
the chorda tympani nerve is a branch of CN VII that leaves through the petrotympanic fissure and hitches a ride on the ________ nerve
lingual
58
The chorda tympani nerve has 2 types of fibers, what are they
Preganglionic parasympathetic Afferent taste fibers
59
The preganglionic parasympathetic fibers of the chorda tympani nerve synapse at the ____________ ganglion
submandibular
60
The preganglionic parasympathetic fibers of the chorda tympani nerve synapse at the submandibular ganglion, some fibers leave and immediately enter the __________ gland
submandibular
61
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
lingual ; sublingual
62
the afferent taste fibers of the chorda tympani nerve are involved in what potion of the tongue
anterior 2/3rd tongue
63
Lingual nerve immediately distal to the foramen ovale has ___________ fibers only
somatic sensory
64
Lingual nerve immediately distal to the foramen ovale has somatic sensory fibers only and a lesion would present what signs/symptoms
Abnormal pain, temp, & touch sensation from the ipsilateral floor of the mouth, mandibular lingual gingivae, & anterior 2/3rd tongue
65
Chorda tympani nerve in the middle ear or at / immediately distal to the petrotympanic fissure has what kind of fibers
Preganglionic parasympathetic and taste fibers
66
Chorda tympani nerve in the middle ear or at / immediately distal to the petrotympanic fissure and a lesion would present what signs/symptoms
Abnormal taste sensations from ipsilateral anterior 2/3rd tongue
67
LESION: Lingual nerve as it travels between medial pterygoid muscle & the mandible to the 3rd mandibular molar
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
LESION: Lingual nerve as it travels along the floor of the mouth
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
Posterior Superior Alveolar Nerves CN V2 - originate in
pterygopalatine fossa
70
Posterior Superior Alveolar Nerves CN V2 - enters the
posterior superior alveolar foramina
71
Posterior Superior Alveolar Nerves CN V2 - supplies the
posterior maxillary molars
72
Contents of the infratemporal fossa (8 things)
temporalis muscle lateral pterygoid muscle medial pterygoid muscle maxillary artery pterygoid venous plexus CN V3 branches chorda tympani (CN VII) Otic ganglion
73
What is the inferior articulating surface of the TMJ
mandibular condyle/head
74
What are the 2 superior articulating surfaces of the TMJ
articular tubercle/eminence of temporal bone mandibular fossa of temporal bone
75
The retrodiscal pad (tissue) is extremely well vascularized and innervated by CN _____
V3
76
Risks of Masseter Muscle + Botox
Asymmetrical smile - Injection too medial or shallow Dry mouth - Injection too lateral / anatomical variation Paradoxical masseter bulging - Poor diffusion
77
3 arteries from the 1st part of the maxillary artery (called the mandibular portion)
Middle Meningeal A Accessory Middle Meningeal A Inferior Alveolar A
78
MMA ______ into the foramen spinosum
ascends
79
Inferior alveolar artery ________ into the mandibular foramen
descends
80
Long buccal nerve does NOT innervate the _______ muscle
buccinator
81
The inferior dental plexus is responsible for sensory from
mandibular teeth

809 - Exam Block 2 (16 decks)

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