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43 Cards in this Set
- Front
- Back
What is the pneumonic for the roof or the orbit?
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lazy friends make perfect zooalogical examples
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Roof of orbit?
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Frontal and lesser wing of sphenoid
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Floor of orbit?
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Maxilla, zygomatic, palatine
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Lateral orbit?
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Zygomatic, greater wing of sphenoid
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Medial orbit?
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Lacrimal, ethmoid, frontal, body of sphenoid
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What foramen make up the perifery of the orbit?
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Supraorbital and infraorbital foramen.
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What are the intraorbital openings into the orbital cavity?
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I SO ZEN
Inferior orbital fissure superior orbital fissure zygomatico-orbital foramen Etmoidal foramina Nasolacrimal canal |
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CN IV innervates what extrinsic eye ms?
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Superior rectus
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What Innervates the Lateral rectus ms?
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CN VI
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What extrinsic eye mussles are innervated by CN III?
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Sevator palpebrae superiorus, sup rectus, inf rectus, medial rectus and inferior oblique
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What ms. originates at the lesser wing of sphenoid?
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Levator palpebrae superiorus
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Where do all Rectus ms. originate?
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Common tendonous ring in post orbit.
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What is the insertion of the levator palpebrae superiorus?
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Eyelid
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Origin of sup oblique
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body of sphenoid
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Only extrinsic ms that does not originate from posterior part of orbit?
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Inferior oblique. It originates in the ant/med part of orbit
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all extrinsic ms. insert into the sclera of eyeball except_______.
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Levator palpebrae superiorus
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The superior orbital fissur transmits all 3 cranial nerves to extrinsic eye ms. 2 pass through the common tendonous ring. what are they?
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CNIII (sup and inf branches) and CN VI
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What nerve passes through tendonous ring but does not innervate extrinsic eye ms?
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Nasocilary branch of VI
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Draw superior orbital fissure and Tendonous ring.
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Good girl
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The superior branch of the CNIII innervates what?
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Levator palpebrae superiorus and superior rectus ms.
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The inferior branch of the occulomotor nerve innervates what?
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Medial rectus, inferior rectus, inferior oblique and gives a branch to ciliary ganglion
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what ms closes pupil?
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Sphincter pupillae(parasympathetic)
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what ms dilates pupil?
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Dilator pupillae(sympathetic)
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What do ciliary ms do?
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Adjust lense. Parasympathetic
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Short ciliary nerves
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parasympathetic postganglionic to dialator pupillae and ciliary ms's.
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Sympathetic innervation of intrinsic eye ms's?
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From T1-T2 sup cervical ganglion(lat horns). Long ciliary nerves (post ganglionic) going to dilator pupillae.
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Where do the preganglionic fibers going to ciliary ganglion originate from?
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Edinger westphal nucleus traveling with CNVIII
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Where is cilary ganglion found?
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Behind eyeball, between optic nerve and lat rectus ms
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Where do the cell bodies for the rubro spinal tract originate?
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Red Nucleus
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Lacrimal nerve
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Sensory and secretomotor to lacrimal gland, lateral part of uppereyelid and conjunctiva
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Frontal Nerve
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Has supraorbital and supertrochlear branches and innervates the uppereyelid, scalp to vertex and frontal sinus
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What ms goes through the trochlea?
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Superior oblique
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Nasocillary nerve
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Nasociliary nerve, long ciliary nerve, infratrochlear nerve and ethmoidal nerves. Innervate cornea, medial eyelids, root of nose, ethmoidal and sphenoidal sinus
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Optic nerve
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Special somatic afferents(SSA)-Vision,hearing, and balance
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What are the arterys to the orbit capen said to know?
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Supraorbital, supratrochlear, Dorsal nasal artery, and centeral artery of retina
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Which artery surrounds the optic nerve?
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Central artery of retina
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Drainage of orbit
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Superior and inferior opthalmic veins. they ultimatly drain into cavernous sinus
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What is the orbital venus drainage in direct communication with?
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The cranial vault (fossa)
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The angular vein joins what vein?
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facial vein
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What syndrome is caused by damage to cervical sympathetic trunk?
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Horners syndrome
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Signs of horners syndrome
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Droopy eyelid, paralysis of LPS, constriction of pupil, warm skin on face, and vasodilation of blood vessels of skin.
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What syndrome is cause by damage to midbrain and CNIII
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Webers syndrome
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Signs of webers syndrome
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Ipsilateral paralysis of eye and contralateral hemiplegia(paralysis od muscles on opposite side of body)
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