Neuro Exam Orbit Flashcards
Roof of orbit
orbital plate of frontal and lesser wing of spenoid
Floor of orbit
Orbital surface of maxilla, orbital surface of zygomatic, orbital process of palatine
medial wall of orbit
frontal process of maxilla, lacrimal, orbital plate of ethmoid
lateral wall of orbit
orbital surface of zygomatic, greater wing of sphenoid
Base of orbit
orbital margin-outline/surrounds the opening to the eye socket
Apex of the orbit
optic canal and foramen through the lesser wing of the spenoid
optic foramen or canal
optic nerve (CNII) and opthalmic artery
superior orbital fissure
occulomotor nerve (CNIII), trochlear nerve (CNIV), abducens nerve (CN VI), opthalmic division of trigeminal (V1), and superior opthalmic vein
inf orbital fissure
infraorbital NAV (nerve of maxillary division of trigeminal-CN V2) and inf. opthalmic vein
supraorbital foramen
sup. orbital NAV (nerve is of the opthalmic division of CNV, V1
infraorbital canal
the nerve runs through the infraorbital groove into the infraorbital canal and out the front of the face through the infraorbital foramen. Infraorbital NAV (nerve is max divisions of the trigeminal CN V2)
Ant. ethmoidal foramen
on the medial wall of orbit /sup border of ethmoid bone; ant. ethmoidal nerve (nasocilliary- branch of V1) runs through this foramen
Post ethmoidal foramen
medial wall of orbit/sup border of the orbital part of ethmoid- post ethmoidal nerve runs through (nasocilliary-branch of V1)
Canal for nasolacrimal duct
nasolacrimal sulcus/fossa
Zygomaticofacial foramen
Zygomaticofacial NAV–(considered with obital region due to the transmission of) zygotmatic nerve through the inferior orbital fissure into the orbital cavity and out the foramina.
Zygomaticotemporal foramen
Opposite the Zygomaticofacial foramen-
Considered with the orbital region-transmts zygomatical facial n. (of maxillary division V2)
CNII name and location
optic, behind the globe of the eye
CNIII
occulomotor- innervates every muscle except sup oblique and lateral rectus
Trochlear Nerve
CNIV; innervates sup oblique m.
innervates sup. oblique m.
trochlear (CNIV)
Abducens innervates
CNVI-innervates lateral rectus only
innervates lateral rectus
Abducens (CNVI)
Opthalmic Division of Trigeminal
V1- primary sensory nerve for face, sensory innervation from trigeminal to eye, through supraorbital fissure –> 3 branches
primary sensory nerve of the face
Opthalmic Division of Trigeminal (V1)
Frontal Nerve
branch of opthalmic (V1)-splits into supraorbital and supratrochlear n. which are sensory n. to scalp and upper eyelid)
sensory to scaplp and upper eyelid
frontal nerve- specifically supraorbital and suprtrochlear n. branches
lacrimal nerve
branch of V1; sensory into lacrimal gland, eye conjunctiva, and lateral upper eyelid
nasocilliary neve
branch of V1-most of its branches travel medial (sideways) many branches
branches of nasocilliary nerve
4 (or 5)branches... PAIL -Post ethmoidal -ant ethmoidal -infratrochlear nerve -long ciliary nerve
ant. ethmoidal nerve
branch of nasocilliary; sensory info from ethmoidal air sinuses and outer nose
post ethmoidal nerve
branch of nasocilliary (which is branch of V1)- sensory info from the ethmoidal air sinuses
infratrochlear nerve
branch of nasocilliary-runs under hook-sensory at trochlea
long cilliary nerve
branch of nasocilliary (branch of V1)- runs to back of eyeball and carries sensory info from the eyeball(as does short ciliary)
carries sensory info from the eyeball
the long and short ciliary nerves which are branches of the nasocilliary nerve which is a branch of V1-opthalmic vein
Ciliary ganglion location
located off the nasociliary nerve
short ciliary nerves
run between ganglion and back of eye; contain sensory fibers which serve the eye
long ciliary nerves
branches between the back of the eye and nasociliary nerve; sensory fibers innervating the eye and cornea
Opthalmic artery goes through the
optic foramen/canal with the optic nerve
branches of the opthalmic artery
- Post. ethmoidal art.
- Ant. ethmoidal art.
- lacrimal artery-supraorbital artery
inf and sup opthalmic veins drain here
cavernous sinus-linked to brain via vessels and can cause spread of infection
Lacrimal gland location and function
in lacrimal fossa-produces tears
puncta
small holes in medial aspect of the orbit where tears run into; if they cannot absorb = crying
lacrimal gland canals
lead tears from puncta to nasolacrimal duct
nasolacrimal duct empties into
nasal cavity
Retrobulbar fat
fills all of the spaces between eye muscles, arteries, and nerves in order to protect from trauma
infraorbital and zygomatic nerves are branches of the
maxillary nerve V2-enter via inf orbita fissure
