Head Cont. Flashcards
What are the 3 salivary glands?
-Parotid
-Submandibular
-Sublingual
Where does the parotid sheath travel?
Through the buccinators, near the upper 2nd molar, and empties into the oral vestibule
What nerve serves the parotid gland?
Glossopharyngeal Nerve
-Parasympathetic that travels through the otic ganglion
This gland has a duct that travels under the tongue and it travels laterally to the thing that holds the tongue down
Submandibular
What innervates the submandibular nerve?
Parasympathetic from the mandibular ganglion
Does the sublingual have a duct?
No- it just goes up through the floor under the tongue and there is not a specific duct
Where is the apex of the orbit located?
At the optic canal
What are the contents of the orbit?
-Eye
-Extraoccular muscles
-Lacrimal gland
-Fat (bc it is a pyramid shape with a sphere in it)
What innervates the lacrimal gland?
Facial Nerve- parasympathetic secretomotor
-also goes to the buccus gland and the nose
What are the contents of the lacrimal apparatus?
-Lacrimal gland
-Lacrimal lake
-Papilla
-Punctum
-Canaliculi
-Lacrimal Sac
-Nasolacrimal Duct
What are the 2 chambers of the eye? and what seperates them?
-Anterior and Posterior
-Seperated by the iris and the pupil connects them
What compartment has chambers? and what are they?
-Anterior compartment has anterior and posterior chambers
What are the 3 layers of the eye?
-Outside= Fibrous, the dural mater forms the sclera
-Middle= Vascular- spread out in the coroid layer, contains the cilirary body and the iris
- This is where inflammation occurs (bc cant have inflammation without vessels)
-Inner= Neural Layer
What is secreted by the superior conjunctival fornix?
-A lipid substance so your eye doesn’t stick together
What is the purpose of the tarsal plate?
-Gives rigidity to the upper plate and lifts upper lid
What 2 things does the ciliary body contain?
-Ciliary muscle and ciliary process
What is the significance of the iridocorneal angle?
-Aqueous humor drains back into the veins here
What happens if you have poor drainage in the iridocorneal angle?
Increase in fluid= increase in pressure= glaucoma due to the pressure on the nerve
What are the extra-occular muscles?
-Levator palpebrae superioris
-Superior oblique
-Inferior oblique
-Superior rectus
-Inferior rectus
-Medial rectus
-Lateral rectus
What movements does the eye do around the vertical axis?
-Abduction
-Adduction
What movements does the eye do around the horizontal axis?
-Elevation
-depression
Describe what happens in extorsion
The superior iris rotates laterally on the visual axis
Describe what happens in intorsion
The superior rectus rotates medially on the visual axis
What nerves are included in the orbit?
-Optic (2)
-Oculomotor (3)
-Trochlear (4)
-Abducens (6)
-Branches of opthalamic division of CN 5
