Head And Tmj Anatomy Flashcards
Where is LA injected in the mandible , which nerve?
Through the mental foramen, inferior alveolar nerve part of the Trigeminal mandible division
You can also LA the superior alveolar nerve, slightly behind the infraorbital foramen
2 processes of the mandible
Condylor and coronoid process
What is the articulate tubercle
It prevents complete dissociation of the mandible
Where does the optic nerve pass through
Optic foremen
What passes through the superior orbital fissure?
Oculomotor
Trochlear
Trigeminal (ophthalmic division)
Abducens
Which cranial nerves are found at the cavernous sinus
3
4
5a and b
6
What drains into the cavernous sinus
Ophthalmic veins
What is the danger of the ophthalmic vein and cavernous sinus
If there is surface infection, the infection flows through the ophthalmic vein and into the cavernous sinus. A lot of nerves are located at the cavernous sinus (CN3456).. could lead to thrombosis or sepsis
What is the function of the internal and external jugular vein
The intern,a jugular vein drains the cerebrum, inside of the skull, most of external structures of the head and neck.
The external jugular vein drains some external structures eg. Posterior auricular vein or retro mandibular vein
What percentage of the brain does the internal carotid artery supply
80%
Structure of the articular disc
- found in the capsule
- Fibrocartilage
- concave undersurface
- concavoconvex upper surface
Styloid process
From inferior part of petrous temporal bone to stylomandibular ligament?
3 ligaments in the TMJ
Lateral
Stylomandibular
Sphenomandibukar
Blood supply of TMJ
External carotid artery (superficial temporal branch and Maxillary arteries
Nervous supply of TMJ
Auriculotemporal and Masseteric branch (all under V3)
What artery lies at the pterion
Middle meningeal artery
How many cranial bones
8
How many facial bones
14
What is the vomer bone
The single vomer bone separates the left and right nasal cavity
What are the three cranial sutures
Coronal
Sagittal
Lambdoid
What are fontanelkes
They are the spongy part of the skull in kids that overlap when they are born so that the head can leave the birth canal
What part of the temporal bone is part of the pterion
Squamous part
What cranialnerve is the nasopalatine nerve a part of
Maxillary branch of the Trigeminal nerve
Nasociliary is part of the ophthalmic branch of Trigeminal nerve
Function of the emissary veins
Drains the extracranialsystem into the larger meningeal veins and the ducal venous sinuses
What supplies general sensation to the tongue
Anterior 2/3 general sensation mandibular branch of Trigeminal
Posterior 1/3 general sensation Glossopharyngeal
Special taste sensation. To tongue
Anterior 2/3 - facial nerve chorda tympani branch
Posterior 1/3 - Glossopharyngeal
Motor function to tongue
Hypoglossal
Vagus - palatoglossus
What are the muscles of the tongue
Intrinsic muscles
Hyoglossus
Genioglossus
Styloglossus
Petrous temporal bone
Where the middle and inner ear sits
What does the middle meningeal artery supply? (Pterion)
Supplies the dura mater
Describe the venous drainage of the head
Emissary veins or ophthalmic veins -> dural venous sinuses like cavernous sinus -> internal jugular vein
