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7-10 orbit

QuestionAnswer
What bones form the lateral side of the orbit? Zygomatic and frontal
What bones form the medial side of the orbit? Lacrimal, ethmoid, and maxilla
What bone forms the superior side of the orbit? Frontal
What bones form the inferior side of the orbit? Maxill and zygomatic
What bone forms the posterior side of the orbit? Sphenoid
What artery branches off the internal carotid artery? Ophthalmic artery
What artery branches off the ophthalmic artery? Central artery of the retina
Why is the eye very fatty? Protection and movement
What drains into the lacrimal sac which is in the lacrimal bone? Lacrimal canaliculi
Where is the lacrimal gland located? Superior and lateral
What part of the eye does chronic dry eyes effect? Cornea
What is the optic nerve an extension of? Forebrain
What does the facial nerve go through before it innervates the facial muscles? Stylomastoid foramen
What other foramen, besides the carotid canal, is the internal carotid artery associated with? Foramen lacerum
What is termed as the "truck stop"? Pterygopalatine ganglion
What nerve is in charge of the special sensory/taste from anterior 2/3 of the tongue? Chorda tympani nerve
Is the greater petrosal nerve parasympathic or sympathetic? Parasympathetic (presynaptic)
Is the deep petrosal nerve parasympathic or sympathetic? Sympathetic (postsynaptic)
What is the lacrimal nerve a branch of? Ophthalmic (CN V1)
What is the zygomatic nerve a branch of? Maxillary (CN V2)
Where do the rectus muscle originate? Common tendinous ring
Where do the rectus muscles insert? Sclera
Levator palpebrae superioris OINA O- lesser wing of sphenoid I- superior tarsus and skin of superior eyelid N- oculomotor A- elevate superior eyelid
Superior oblique OINA O- body of sphenoid I- fibrous ring then inserts on sclera N- trochlear A- abducts, depresses, medially rotates
Inferior oblique OINA O- anterior part of orbit I- sclera N- oculomotor A- abducts, elevates, laterally rotates
Superior rectus OINA O- common tendinous ring I- sclera N- oculomotor A- adducts, elevates, medially rotates
Inferior rectus OINA O- common tendinous ring I- sclera N- oculomotor A- adducts, depresses, laterally rotates
Medial rectus OINA O- common tendinous ring I- sclera N- oculomotor A- adducts
Lateral rectus OINA O- common tendinous ring I- sclera N- oculomotor A- abducts
What does the trochlear nerve help you do? Look down
If the trochlear nerve is damaged, what can be a result? Diplopia
If the abducens nerve is paralyzed, what muscles take over? Medical rotators
What nerve comes across from the other side of the brain? Trochlear nerve
If a trochlear nerve injury occurs close to the brainstem, which eye will be effected? Contralateral
What is the ciliary ganglion close to? Optic nerve
What nerve is a branch of V1 and innervates the cornea? Long ciliary nerve
What two muscles are intraocular muscles? Dilator pupillae and sphincter pupillae
Do parasympathetic or sympathetic impulses go straight through the ganglion to intraocular vessels? Sympathetic
What nerve is postsynaptic (sympathetic) and goes to the front of the eye? Short ciliary nerve
What part of the eye is avascular so it is unable to repair itself? Cornea
What part of the eye has high acuity? Macula/fovea centralis
What are the two muscles of the iris? Dilator pupillae and sphincter pupillae
If you lose parasympathetic impulses, what happens to the eye? Eye stays dilated
What is the fovea centralis mostly made up of? Cones
What part of the eye is the blind spot and is where the nerves come in? Optic disk
What part of the eye is active in dim light? Rods
What part of the eye is active in bright light? Cones
What are the two branches of the frontal nerve? Supraorbital and supratrochlear nerves
Why are clots possible in the facial veins? No valves
What are the four veins that can potentially drain into the cavernous sinus? Superior ophthalmic, inferior ophthalmic, pterygoid venous plexus, facial
Created by: beranml