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Anatomy 2 Unit 2 > 5 - Parotid & Temporal & TMJ > Flashcards

5 - Parotid & Temporal & TMJ Flashcards

1
Q

Parotid gland is just inferior to

A

ext. acoustic meatus

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2
Q

Swelling of parotid gland will

A

push ear superolateral

Mumps

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3
Q

Retromandibular Vein formed by

A

superficial temporal & maxillary vv.

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4
Q

Retromandibular vein Enters parotid

A

posterior to ramus of mandible

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5
Q

Retromandibular vein Splits into

A

2 divisions that drain into the EJV & IJV

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6
Q

Distal portion of External Carotid Artery lies deep

A

within parotid gland

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7
Q

ECA Parallels

A

retromandibular v. just deep to it

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8
Q

ECA splits into 2 branches:

A

Post. to mandibular neck, splits to 2 terminal branches
Superficial temporal a
Maxillary a

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9
Q

The parotid gland wraps around the posterior aspect of the

A

mandibular ramus

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10
Q

Facial n., external carotid a., and retromandibular v. within the

A

parotid gland

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11
Q

Deep to the parotid bed =

A

carotid sheath, containing internal carotid artery, internal jugular vein, and the vagus nerve.

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12
Q

Facial Nerve (CN VII) exits

A

cranium via stylomastoid foramen

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13
Q

Facial Nerve (CN VII) forms

A

parotid plexus within gland

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14
Q

CN VII Branches emerge &

A

fan out over lateral aspect of face

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15
Q

CN VII Leaves the brainstem and enters the Internal acoustic meatus and

A

travels through the temporal bone. Its sensory ganglion = the geniculate ganglion, lies within the temporal bone.

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16
Q

Contents of Temporal Fossa

A

temporal fat pad
Temporalis m
Masseter m
Neurovasculature

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17
Q

Temporalis m.

A

covered by thick temporal fascia

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18
Q

Masseter m

A

works with temporalis m. to elevate mandible (*Not content of Temporal fossa)

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19
Q

Masseter innervation

A

masseteric br. of CN V3

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20
Q

Temporal fat pad:

A

Enclosed in temporal fascia & fills out temple region

Between temporalis m. & lat. wall of orbit

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21
Q

Trigeminal N. Mandibular division (CN V3) nerves

A

Auriculotemporal Nerve

Ant. & Post. Deep Temporal nn

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22
Q

Auriculotemporal Nerve travels with

A

with Superficial temporal a & v

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23
Q

Auricotemporal nerve Runs deep to

A

parotid gland & post. to TMJ

Between the auricle & condyle of mandible

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24
Q

Auricotemporal nerve Provides sensory innervation to

A

to TMJ & lat. scalp

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25
Auricotemporal nerve Carries
p-symp. fibers from CN IX into parotid gland
26
Ant. & Post. Deep Temporal nn. Passes
sup. to lat. Pterygoid m. & deep to temporalis m.
27
Infratemporal Fossa borders
``` Lateral – Ramus of mandible Medial – Lateral pterygoid plate Anterior – Maxilla Posterior – Tympanic plate, mastoid & styloid processes ```
28
Infratemporal fossa roof
Inferior surface of the Greater wing of the Sphenoid; Temporal bone Foramen Ovale Foramen Spinosum
29
Infratemporal Fossa Contents - muscles
temporalis, medial & lateral pterygoids mm
30
Infratemporal fossa contents A & V
Maxillary & brs; Pterygoid plexus of veins
31
Infratemporal fossa Nerves
``` Mandibular division of CN V (V3) Posterior superior alveolar n. (V2) Chorda tympani n. br of CN VII (Facial) Otic ganglion Lesser Petrosal n. ```
32
Remember the lateral border of the infratemporal fossa is the
mandibular ramus and its coronoid process
33
Remember also that the Temporalis m. is continuous
inferiorly from the temporal fossa into the infratemporal fossa
34
Medial Pterygoid m.
elevates, protrudes & rotates mandible
35
Lateral Pterygoid m.
opens, protrudes and rotates mandible
36
Trigeminal N (CN V): Mandibular V3 - has large
Large sensory root & small motor root
37
CN V Mandibular V3 Large sensory small motor roots Unite after passing through
foramen ovale to enter infratemporal fossa
38
CN V Mandibular V3 branches:
Meningeal branch n (immediately)
39
CN V Mandibular V3 muscles
Medial pterygoid, tensor tympani & tensor veli palatini nn
40
CN V Mandibular V3 Divides into Anterior & Posterior divisions
Ant. : small, mainly motor 1 sensory branch (Buccal n) Post. : larger, mainly sensory 1 motor branch (mylohyoid n
41
CN V Mandibular V3 all branches***
``` Auriculotemporal N. Masseteric & Deep temporal (A & P) Nn. Med. & Lat. Pterygoid Nn. Buccal N. Inferior Alveolar & Lingual Nn. Meningeal branches ```
42
Auriculotemporal N. CNV Mand V3
sensory
43
Masseteric & Deep temporal (A & P) Nn. CN V mand V3
motor
44
Med. & Lat. Pterygoid Nn. CN V Mand V3
motor
45
Buccal N. CNV Mand V3
sensory
46
Inferior Alveolar & Lingual Nn. CNV Mand V3
Sensory
47
Meningeal branches CNV Mand V3
sensory
48
CNV Mand V3 Nerves of Mastication
Masseteric N Deep temporal Nn Med. & Lat. Pterygoid Nn.
49
Masseteric N.
runs with masseteric A. | Supply masseter m. (thru mand. Notch)
50
Deep temporal Nn
run with deep temporal Aa. | Supply temporalis m (passes deep to it)
51
Med. & Lat. Pterygoid Nn.
run with pterygoid Aa. | Supply med. & lat. Mm.
52
Buccal N.
Runs with Buccal A. | Brs. Pierce Buccinator M.
53
Buccan N. supplies
Supply sensory fibers to Buccal mucosa & skin of cheek
54
Lingual Nerve emerges
below lateral pterygoid m. | Just anterior to inferior alveolar n.
55
Lingual nerve travels in
inferior surface of tongue to supply it
56
Lingual nerve provides
Sensory to anterior 2/3 of tongue
57
Chorda Tympani N. (CN VII)
Special sensory br. Of CN VII
58
Chorda tympani n CNVII Joins
Lingual N. posteriorly
59
Chorda tympani n CNVII supplies
p-symp. innervation to lower 2 salivary glands
60
Chorda tympani n CNVII Also carries
taste fibers from anterior 2/3 tongue
61
Temporomandibular Joint (TMJ) formed by portions of
temporal bone & mandible
62
TMJ is a Modified
hinge type synovial joint
63
TMJ has a Relatively lax
articular capsule surrounding joint
64
TMJ Thickened laterally to form
lat. Temporomandibular ligament
65
TMJ Contains
articular disc between temporal bone & mandible
66
TMJ Movements include
hinge & gliding actions
67
TMJ info
``` Hinge type (ginglymus) synovial joint with 2 synovial cavities separated by oval, biconcave, fibrocartilaginous (may be purely fibrous) intra-articular disc; disc is attached circumferentially to joint capsule and is also attached, in front, to superior head of lateral pterygoid muscle, to ensure forward movement of disc with protrusion of condyle ```
68
TMJ Anteriorly, articular surface of mandibular fossa is covered by
fibrocartilage and continues | onto articular tubercle; thus, tubercle lies within capsule
69
Specifics of the Articular Disc surface:
Concavoconvex superior surface Concave inferior surface Increases in thickness toward periphery
70
Concavoconvex superior surface | TMJ articular disc - it is to fit
to fit articular tubercle & mandibular fossa
71
Concave inferior surface TMJ articular disc
to fit around mandibular condyle
72
Increases in thickness toward periphery | TMJ articular disc
where it attaches to articular capsule
73
Accessory Ligaments of TMJ
Stylomandibular ligament | Sphenomandibular ligament
74
Stylomandibular ligament
From styloid process to posterior border of mandibular ramus
75
Sphenomandibular ligament
from spine of sphenoid bone to lingula of mandible
76
Stylomandibular lig Separates
parotid & submandibular glands
77
Sphenomandibular lig separated from
capsule by maxillary a. & auriculotemporal n.
78
Any swelling in parotid gland can effect
facial nerve
79
Posterior division of retro drains into
EJV
80
Parotid bed
scm, masseter, parotid, Medial pterygoid, posterior belly of digastric, spinohyoid.
81
Muscles of facial expression derived from pharyngeal arch #
3
82
Hypoglossal n
comes around lateral to occipital a. branch
83
Infratemporal fossa space involved in a lot of
infections
84
Head and neck veins are
valveless - in cases of extreme inflammation, this can allow for blood to return by another pathway. Pterygoid plexus has anastamoses to damn near everything.
85
General sensation anterior 2/3rds is
Mandibular V3 (trigeminal)
86
TMJ cartilage connected to
lateral pterygoid, everytime it contracts, it forces the cartilage to move.
87
retrodistal zone
back part of articular disc. Has venous plexus, very complex properties.
88
auriculotemporal nerve splits around (both sides) of
middle meningeal a.

Anatomy 2 Unit 2 (15 decks)

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