Head and Neck 6 Flashcards
What is A?
What is B?
Lacrimal
What is C?
Ethmoid
What is D?
Supra-orbital notch
What is E?
Frontal
What is F?
Palatine
What is G?
Zygomatic
What is H?
Maxilla
What passes through the optic foramen?
Optic nerve
Opthalmic artery
What passes through the superior orbital fissure?
Oculomotor nerve (CN III)
Trochlear nerve (CN IV)
Abducens nerve (CN VI)
Opthalmic division of CN V
Opthalmic veins
What passes through the inferior orbital fissure?
Maxillary division of CN V
What are the 3 foramina at the apex of the orbit?
Optic foramen
Superior orbital fissure
Inferior orbital fissure
What is A?
Frontal sinus
What is B?
Ethmoid sinus
What is C?
Maxilla sinus
What are the main contents of the orbit?
Eye ball
Extrinsic ocular muscles
Ligaments supporting the eye
Optic nerve
Branches of opthalmic artery
Lacrimal apparatus
Opthalmic artery is a branch from what?
ICA
What are the 3 layers of the eye?
Outer fibrous layer
Middle vascular layer
Inner sensory layer
What forms the outer fibrous layer of the eye?
Sclera
Cornea
Is the outer fibrous complete or incomplete?
Is a complete layer (extends all the way through)
What forms the middle vascular layer of the eye?
Choroid
Ciliary body
Iris
Is the middle vascular layer complete or incomplete?
Is incomplete anterior
Anterior aperature (in iris) is called the pupil
What is the inner sensory layer composed of?
Retina
Is the inner sensory layer of the eye complete or incomplete?
Present posteriorly but anteriorly stops short just in front of equator of eye
What can the crystalline lens of the eye be divided into?
Anterior - aqueous humor (water fluid in anterior section)
Posterior - vitreous humor (gel in posterior segment)
What part of the eye produces aqueous humor?
Ciliary epithelium which is a structure that supports the lens
What are the intrinsic muscles of the eye?
Ciliaris
Sphincter pupillae
Dilator pupillae
What is the location, action and innervation of the ciliaris?
Location - acts on lens
Action - accomodation
Innervation - parasympathetiv via CN II
What is the location, action and innervation of the sphincter pupillae?
Location - pupillary border of iris
Action - constricts pupil
Innervation - parasympathetic via cranial nerve CN III
What is the location, action and innervation of the dilator pupillae?
Location - outside border of iris (not next to pupil)
Action - dilates pupil
Innervation - sympathetic innervation
Are movements are produced by intrinsic or extrinsic muscles of the eye?
Extrinsic muscles
What are the different movements of the eyes?
Elevation
Adduction (looking medially)
Abduction (looking laterally)
Depression
Intort
Extort
When can intortion and extortion of the eyes occur?
When the head is tilted to keep the eyeballs focussed on an object the eyes rotate in the opposite direction
What is intortion?
When the top of the eye rotates towards the nose
What is extortion?
When the top of the eye rotates away from the nose
The eyes looking laterally is called?
Abduction
The eyes looking medially is called?
Adduction
What is A?
Trochlea (ligamentous sling)
What is B?
Superior oblique
What is C?
Superior rectus
What is D?
Levator palpebrae superioris
What is E?
Medial rectus
What is F?
Optic nerve
What is G?
Superior rectus
What is H?
Superior rectus
What is I?
Superior oblique
What is J?
Frontal bone
What is K?
Levatator palpebrae superioris
What is L?
Trochlea
What is M?
Inferior oblique
What is N?
Maxilla
What is O?
Inferior rectus
What is P?
Lateral rectus
What is Q?
Inferior rectus
What is A?
Trochlea
What is B?
Superior oblique
What is C?
Medial rectus
What is D?
Inferior rectus