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Anatomy > G51: Temporal region > Flashcards

G51: Temporal region Flashcards

1
Q

Mylohyoid line

A

medial side of the body of the mandible, insertion of mylohyoid m.

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2
Q

TMJ

A

Condylar process of mandible in the articular fossa/glenoid fossa

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3
Q

Mandibular notch

A

lies between coronoid and condylar process

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4
Q

Mandibular foramen

A

medial aspect of ramus of mandible; passage of inferior alveolar nerve and vessels

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5
Q

Lingula

A

bony projection that extends the area of the mandibular foramen; where the sphenomandibular ligament attaches

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6
Q

Sphenomandibular ligament

A

flat, thin band which is attached superiorly to the sphenoid spine, and becomes broader as it descends, is fixed to the lingula of the mandibular foramen, prevents over depression of mandible

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7
Q

Temporalis origin

A

temporal fascia, temporal fossa, and inferior temporal line

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8
Q

Temporalis insertion

A

coronoid process and anterior margin of ramus

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9
Q

Temporalis innervation

A

Deep temporal n. (CN V3)

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10
Q

Temporalis action

A

vertical fibers elevate the mandible, horizontal fibers retract the mandible

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11
Q

Masseter origin

A

zygomatic arch

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12
Q

Masseter insertion

A

superficial head- lateral mandibular angle and deep head - lateral mandibular ramus

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13
Q

Masseter innervation

A

masseteric branch of CN 5-3

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14
Q

Masseter action

A

elevate mandible, protraction

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15
Q

Medial and lateral pterygoid muscles

A

major muscles of mastication

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16
Q

Temporal fossa

A

zygomatic arch to inferior temporal line, occupied by temporalis

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17
Q

Vessels of temporal region

A

superficial temporal a./v. and auriculotemporal n.

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18
Q

Roof of temporal fossa

A

temporal fascia

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19
Q

Floor of temporal fossa

A

squamous temporal bone, greater wing of sphenoid, parietal, frontal

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20
Q

anterior wall of temporal fossa

A

zygomatic bone

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21
Q

Superior temporal line

A

attachment of temporal fascia

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22
Q

infratemporal crest

A

boundary between infratemporal fossa and temporal fossa

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23
Q

Infratemporal fossa

A

inferior to the temporal fossa and deep to the ramus of the mandible

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24
Q

Lateral boundary of infratemporal fossa

A

ramus of mandible

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25
Anterior boundary of infratemporal fossa
body of maxilla
26
Medial boundary of infratemporal fossa
contains pterygomaxillary fissure; lateral pterygoid plate of sphenoid, superior pharyngeal constrictor, tensor veli palatini, levator veli palatini
27
Roof of infratemporal fossa
greater wing of sphenoid and squamous temporal
28
What foramen open from the middle cranial fossa to the infratemporal fossa
foramen ovale and foramen spinosum
29
Contents of infratemporal fossa
medial and lateral pterygoid mm., maxillary a, pterygoid plexus, mandibular div of CN 5-3
30
Lateral pterygoid m. origin
superior head - infratemporal crest and inferior head - lateral pterygoid plate
31
Lateral pterygoid m. insertion
capsule of TMJ and neck of mandible
32
Lateral pterygoid m. innervation
Lateral pterygoid branch of CN 5-3
33
Lateral pterygoid m. action
protracts and laterally deviates mandible
34
Medial pterygoid m. origin
medial side of lateral pterygoid plate
35
Medial pterygoid m. insertion
mandibular ramus and angle
36
Medial pterygoid m. innervation
Medial pterygoid branch of CN 5-3
37
Medial pterygoid m. action
elevates protracts and laterally deviates jaw
38
External carotid terminal branches
maxillary a and the superficial temporal a
39
Maxillary a
enters infratemporal fossa via parotid gland deep to the ramus of mandible exits via the pterygomaxillary fissure
40
1st part of maxillary a branches
deep auricular (posterior to ear), anterior tympanic, middle meningeal (dives into foramen spinosum), inferior alveolar (dives inferior to mandibular foramen), mental (continuation of inferior alveolar), accessory meningeal
41
2nd part of maxillary a branches
deep temporal (to temporalis), pterygoid (to medial and lateral pterygoids), buccal (to buccinator), masseteric (to masseter)
42
3rd part of maxillary a branches
posterior superior alveolar (into body of maxilla), infraorbital (inferior orbital fissure); enters pterygopalatine fissure sphenopalatine and descending palatine a
43
pterygoid plexus
venae comitantes lying on maxillary a
44
pterygoid veins may spread infection to interior of cranium bc
they are valveless and have connections to the cavernous sinus
45
Mandibular div of CN 5
Sensory and motor, foramen ovale, parasympathetic otic ganglion (lesser petrosal -> auriculotemporal n.)
46
Auriculotemporal n.
sensory to auricle, parotid gland, and temporal region; postganglion from otic to parotid gland Surrounds middle meningeal a.
47
Inferior alveolar n.
enter the mandibular foramen- sensory to teeth, mandible, and lower lip gives mental n. to provide sensory to chin
48
nerve to mylohyoid
innervates ant belly of digastric and mylohyoid
49
Lingual n.
deep to ramus, sensory to anterior 2/3 of mouth and and floor of mouth; chorda tympani joins carrying SPECIAL sensory taste to anterior 2/3 tongue and parasympathetic fibers to submandibular gland, postganglionic parasympathetic rejoin lingual to innervate sublingual gland
50
Buccal n.
descends along superficial surface of buccinator; Sensory to cheek
51
meningeal branch
runs with the middle meningeal a.; sensory to dura
52
TMJ
synovial joint between condylar process of mandible and glenoid fossa
53
Intra-articular disc
thick post. and ant. band of fibrocartilage with thin central portion; dividing joint into superior and inferior compartments
54
superior compartment of TMJ
permits gliding movement (glenoid fossa to articular eminence)
55
inferior compartment of TMJ
permits hinge movement
56
Lateral pterygoid m. is responsible for
gliding movement of superior compartment (superior head of lateral pterygoid)
57
Lateral ligament (temperomandibular ligament)
zygomatic tubercle to mandibular neck; short thickening of fibrous capsule
58
Sphenomandibular ligament
sphenoid spine to the lingula of mandible
59
Stylomandibular ligament
styloid process to medial portion of mandibular angle
60
Full opening of the mouth requires
gliding movement of superior compartment, mandible slides forward onto the articular eminence (superior head of pterygoid, superior compartment)
61
joint dislocation
excessive opening; condyle slips anterior to articular eminence and becomes jammed upward
62
lateral deviation of jaw
the contralateral side slides anteriorly while the lateral deviating condyle pivots
63
Maxillary artery branches are divided into three parts based on what?
position relative to the lateral pterygoid m.
64
otic ganglion
attached to the deep side of the at level of foramen ovale
65
Pain or clicking of the TMJ may be a result of
a torn or degenerated articular disc
66
hinge movements of the jaw take place in what compartment
inferior compartment of the joint capsule
67
Pivoting about the vertical axis of the TMJ joint involves which compartment
superior compartment of joint capsule
68
The sphenomandibular ligament inserts onto what feature of the mandible?
lingula
69
The middle meningeal artery passes through which of the following?
foramen spinosum
70
Preganglionic parasympathetic nerve fibers that synapse on the submandibular ganglion are carried by which of the following nerves?
lingual n.

Anatomy (14 decks)

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