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7-10 orbit
| Question | Answer |
|---|---|
| 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
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