Infratemporal Fossa and Oral Cavity Flashcards
1
Q
Osteological features of Sphenoid Bone
A
![](https://s3.amazonaws.com/brainscape-prod/system/cm/012/044/972/a_image_thumb.png?1659399341)
2
Q
Osteology of Mandible
A
![](https://s3.amazonaws.com/brainscape-prod/system/cm/012/045/440/a_image_thumb.png?1659399342)
3
Q
Inside Osteology of Mandible
A
![](https://s3.amazonaws.com/brainscape-prod/system/cm/012/045/782/a_image_thumb.png?1659399342)
4
Q
Contents of Infratemporal Fossa
A
- Muscles of Mastication
- Otic ganglion
- Temporomandibular Joint
- Maxillary Artery
- Pterygoid plexus of veins
- Branches of V3
- Otic ganglion
- Chorda Tympani - from CN VII
5
Q
What arch are all muscles of mastication associated with?
A
- 1st Pharyngeal Arch
6
Q
All Muscles of mastication are motor supplied by what nerve?
A
V3
7
Q
Masseter Function
A
- Elevtates Mandible (if both contracted)
- Ipsilateral excursion (if one contracted)
8
Q
Temporalis
A
- Elevates mandible
- posterior fibers RETRACT mandible
- ipsilateral excursion if one side contracting
![](https://s3.amazonaws.com/brainscape-prod/system/cm/012/048/970/a_image_thumb.png?1659399342)
9
Q
Medial Pterygoid
A
- Elevates Mandible
- One side contracting = contralateral excursion
![](https://s3.amazonaws.com/brainscape-prod/system/cm/012/050/356/a_image_thumb.png?1659399342)
10
Q
Lateral Pterygoid
A
- Both sides contracting - protrusion of mandible
- One side contracting - contralateral excursion
![](https://s3.amazonaws.com/brainscape-prod/system/cm/012/050/551/a_image_thumb.png?1659399343)
11
Q
Temporomandibular Joint
A
- Bony Features
- Mandibular fossa
- Articular eminence of temporal bone
- Condyle of Mandible
- Synovial Joint
- Articular cartilage
- Capsule
- Intra-articular disc
![](https://s3.amazonaws.com/brainscape-prod/system/cm/012/050/732/a_image_thumb.png?1659399343)
12
Q
Articular Disc
A
- Attached to cricumfrence to joint capsule
- assures dic and condyle move together
![](https://s3.amazonaws.com/brainscape-prod/system/cm/012/051/856/a_image_thumb.png?1659399343)
13
Q
Movement at TMJ
A
- Sliding translation
- Hinge
- Lateral Excursion
14
Q
Actions and Muscles when opening mouth
A
- Suprahyoid muscles initiate motion (depression of mandible, lower joint space)
- must protrude mouth to open
- Condyle and disc must slide anteriorly into **articular eminence **
- Lateral pterygoids - prime mover
15
Q
Actions and muscles when closing mouth
A
- Elevation and retraction of mandible
- Masseter
- medial pterygoid
- temporalis