Infratemporal Fossa Flashcards
1
Q
What attaches to the lingula?
A
Sphenomandibular ligament
2
Q
What attaches to the coronoid process?
A
- Temporalis muscle
- Masseter muscle
3
Q
What articulates with the head of the mandible?
A
Temporal bone
4
Q
What attaches to the pterygoid fovea?
A
Lateral pterygoid muscle
5
Q
What attaches to the ramus of the mandible?
A
- Masseter muscle
- Medial pterygoid muscle
6
Q
What attaches to the angle of the mandible?
A
- Stylomandibular ligament
- Masseter muscle
- Medial pterygoid muscle
7
Q
Contents of the infratemporal fossa
A
- Muscles of mastication
- Maxillary artery and branches
- Pterygoid plexus of veins
- CN V3
- Chorda tympani
- Otic ganglion and lesser petrosal nerve
- Medial aspect of the TMJ
- Sphenomandibular ligament
- Stylomandibular ligament
8
Q
What goes through the pterygomaxillary fissure?
A
- Maxillary artery
- Posterior superior alveolar nerve, vein, and artery
9
Q
What goes through the posterior superior alveolar foramina?
A
Posterior superior alveolar nerve, artery, and vein
10
Q
What goes through the foramen ovale?
A
- CN V3
- Acessory meningeal artery
- Lesser petrosal nerve
11
Q
What goes through the spinosum foramen?
A
- Middle meningeal artery
- Meningeal nerve
12
Q
What goes through the petrotympanic fissure?
A
- Chordia tympani
- Anterior tympanic artery
13
Q
Masseter origin
A
Zygomatic arch
14
Q
Masseter insertion
A
Lateral ramus and angle of the mandible
15
Q
Masseter innervation
A
Masseteric nerve, CN V3 branch
16
Q
Masseter action
A
- Elevate
- Protrusion
- Retrusion
17
Q
Temporalis origin
A
- Temporal lines
- Temporal fossa
18
Q
Temporalis insertion
A
- Coronoid process
- Anterior ramus of mandible
19
Q
Temporalis innervation
A
Anterior and posterior deep temporal nerves, branches of CN V3
20
Q
Lateral pterygoid muscle origin, superior head
A
- Infratemporal surface of greater wing of sphenoid
- Infratemporal ridge
21
Q
Lateral pterygoid muscle origin, inferior head
A
Lateral surface of lateral pterygoid plate
22
Q
Lateral pterygoid muscle insertion
A
- Pterygoid fovea on neck of the mandible
- Articular disk of the TMJ
23
Q
Lateral pterygoid innervation
A
Lateral pterygoid nerve, CN V3 branch
24
Q
Lateral pterygoid action
A
- Depression of mandible
- Protrusion of mandible
- Lateral deviation of mandible
25
Medial pterygoid muscle origin, superficial head
- Maxillary tuberosity
- Pyramidal process of palatine
26
Medial pterygoid muscle origin, deep head
- Medial surface of lateral pterygoid plate
- Pyramidal process of palatine
27
Medial pterygoid muscle insertion
- Medial surface of ramus
- Angle of the mandible
28
Medial pterygoid muscle innervation
Medial pterygoid nerve, CN V3 branch
29
Medial pterygoid muscle action
- Elevate mandible
- Protrusion
30
What is the venous counterpart to the maxillary artery branches?
Pterygoid plexus of veins
31
What artery branches are in the infratemporal fossa?
Maxillary artery
32
What are the three parts of the maxillary artery
1st: Mandibular
2nd: Pterygoid
3rd: Pterygopalatine
33
What parts of the maxillary artery are in the infratemporal fossa?
1st: Mandibular
2: Pterygoid
34
What part of the maxillary artery is in the pterygopalatine fossa?
3rd: Pterygopalatine
35
Where does the 1st mandibular branch of the maxillary artery run?
Horizontally between the neck of the mandible and the sphenomandibular ligament
36
What foramen does the middle meningeal artery go through? Where is it going?
- Foramen spinosum
- Enter the cranial cavity to supply the dura
37
Branches of the inferior alveolar artery
- Mylohyoid artery
- Mental artery
38
The mylohyoid artery courses within the...
Mylohyoid groove
39
What artery goes through the mandibular foramen?
Inferior alveolar artery
40
What artery goes through the mental foramen?
Mental artery
41
Where does the 2nd portion (pterygoid portion) of the maxillary artery course?
Either deep or superficial to the lateral pterygoid muscle
42
How does the 2nd portion (pterygoid portion) of the maxillary artery leave the infratemporal fossa? Where does it go?
- Pterygomaxillary fissure
- Enters the pterygopalatine fossa
43
What does the posterior superior alveolar nerve go through? Where does it go?
- Pterygomaxillary fissure
- Goes from the pterygopalatine fossa back to the infratemporal fossa
44
What is the pterygoid plexus of veins made up of?
Tributaries of the maxillary vein
45
There is communication between the pterygoid plexus of veins and...
- Facial vein
- Opthalmic vein
- Cavernous sinus
46
CN V3 carries what kind of fibers?
Sensory and motor
47
Where does to long buccal nerve go?
In between the superior and inferior heads of the lateral pterygoid muscle
48
What does the long buccal nerve mediate?
- Sensation from the vestibular/buccal gingiva of the mandibular molars
- Skin of the mucosa lining of the cheek
49
What does the auriculotemporal nerve circle around?
Middle meningeal artery
50
What does the auriculotemporal nerve do?
- Mediates sensory branches
- Goes to the TMJ, anterior part of the auricle, skin lining of external acoustic meatus, and skin/scalp of the temporal region
51
The auriculotemporal nerve conveys postganglionic parasympathetic nerve fibers from the...
Otic ganglion to the parotid gland
52
Does the auriculotemporal nerve convey pre or post ganglionic fibers?
Postganglionic
53
Does the auriculotemporal nerve convey sympathetic or parasympathetic fibers to the otic ganglion?
Parasympathetic
54
Does the lesser petrosal nerve convey pre or post ganglionic fibers?
Preganglionic fibers
55
Does the lesser petrosal nerve carry sympathetic or parasympathetic fibers?
Parasympathetic
56
Is the otic ganglion a parasympathetic or sympathetic ganglion?
Parasympathetic
57
What are the steps of parasympathetic innervation to the parotid gland?
- Inferior salivatory nucleus
- CN IX
- Tympanic branch
- Lesser petrosal nerve
- Otic ganglion
- Auriculotemporal nerve
- Parotid gland
58
Where does the lingual nerve go?
Ramus of the mandible and the medial pterygoid muscle
59
What does the lingual nerve mediate?
Sensation from the anterior 2/3 of tongue, floor of mouth, and adjacent lingual gingiva
60
The lingual nerve conveys taste fibers from the...
Chorda tympani nerve
61
What does the chorda tympani nerve mediate?
Taste on anterior 2/3 of tongue
62
Does the chorda tympani nerve have parasympathetic or sympathetic fibers?
Parasympathetic fibers
63
What do the parasympathetic fibers of the chorda tympani do?
Mediate secretions of the submandibular and sublingual salivary glands
64
Where does the inferior alveolar nerve go?
- Between the ramus of the mandible and the sphenomandibular ligament
- Then through the mandibular foramen to the mandibular canal
65
What does the inferior alveolar nerve mediate?
Sensation from the mandibular teeth, vestibular gingiva, mandibular incisors, canines, and premolars
66
What is the motor branch of the inferior alveolar nerve?
Mylohyoid nerve
67
What innervates the mylohyoid muscle?
Mylohyoid nerve
68
What innervates the anterior belly of the digastric muscle?
Mylohyoid nerve
69
What does the mental nerve innervate
Skin of chin and lower lips, mucous membrane of lower lips, labial gingiva near the mandibular incisors, canines, and premolars
70
What nerves would an inferior alveolar nerve block impact?
Mental nerve and lingual nerve
71
What would a buccal nerve block numb?
Buccal gingiva next to the mandibular molars
72
Where does the pterygoid plexus of veins drain into?
Maxillary vein
73
Is the long buccal nerve motor or sensory?
Sensory
