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41 Cards in this Set
- Front
- Back
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What bones make up the orbit? |
Frontal Zygomatic Maxilla Ethmoid Sphenoid Lacrimal |
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What makes up the boundaries of the optic canal? |
Superior: lesser wing of sphenoid Lateral: lesser wing of sphenoid Inferior: lesser wing of sphenoid |
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What runs through the infraorbital fissure? |
Zygomatic nerve Infraorbital nerve (from maxillary branch of trigeminal) & vessels |
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Where do the openings of the lacrimal papilla lead? |
Inferior meatus of nose via the nasolacrimal duct |
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What is the frontal nerve a branch of? |
V1 (ophthalmic) |
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What branch does the supraorbital nerve give off? |
Supraorbital nerve Sensory to the forehead |
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Where is the lacrimal nerve? |
Runs superior to the lateral rectus muscle Innervates the lacrimal gland |
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What are the branches of V1 in the orbit? |
Frontal (and supraorbital)
Lacrimal Nasociliary |
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What does the trochlear nerve innervate? |
Superior oblique muscle It also lies on the superior border of the superior oblique |
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What muscles raise the upper eyelid? |
Levator palpebrae superioris Also superior tarsal |
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What innervates levator palpebrae superioris? |
CN III (oculomotor) |
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What innervates superior tarsal? |
Sympathetics |
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What follows the nasociliary nerve anteriorly and also to the ethmoid bone? |
Ophthalmic artery |
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What do the long ciliary nerves do? |
From nasociliary Sensory to cornea & conjunctiva Afferent limb of corneal reflex |
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What does the corneal (blink) reflex test? |
Trigeminal (V1, sensory) Facial (motor) |
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What is within the ciliary ganglion? |
Nasociliary is sensory root (pass through w/o synapse) Sympathetic postganglionics pass through w/o synapse |
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What types of fibers do the short ciliary nerves have? |
Mixed sensory, sympathetic postganglionic & presympathetic postganglionic |
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From what cranial nerve does the sensory root of the ciliary ganglion give innervation to the eyeball? |
Nasociliary; V1 |
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What nerve is connected to the ciliary ganglion via the motor root? |
Parasympathetics associated with oculomotor |
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Differences between short and long ciliary nerves? |
Long: just sensory Short: mixed sensory, sympathetic postganglionic & parasympathetic preganglionic |
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What is a papilledema? |
Center of optic nerve disc is elevated Whole optic disc bulges into the vitreous chamber; usually the center is concave Could compress vessels |
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What innervates medial rectus? |
Oculomotor |
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What innervates inferior rectus? |
Oculomotor |
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What innervates inferior oblique? |
Oculomotor |
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What innervates superior oblique? |
Trochlear |
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What innervates lateral rectus? |
Abducens |
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What innervates superior rectus? |
Oculomotor |
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How would you test LPS? |
Open eyelid |
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How would you test lateral rectus? |
Straight to lateral side |
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How would you test medial rectus? |
Straight to medial side |
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How would you test superior rectus? |
Up & to lateral side |
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How would you test inferior rectus? |
Down & to lateral side |
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How would you test inferior oblique? |
Up & to medial side |
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How would you test superior oblique? |
Down & to medial side |
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How does a papilledema form? |
Increase in intracranial pressure causes edema of optic nerve Get buildup of material at distal end of optic nerve Lose the concavity of the optic disc |
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Which muscles adduct? |
Medial rectus Superior rectus Inferior rectus |
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Which muscles abduct? |
Lateral rectus Superior oblique Inferior oblique |
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Which muscles elevate? |
Superior rectus Inferior oblique |
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Which muscles depress? |
Inferior rectus Superior oblique |
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Which muscles intort? |
Superior rectus Superior oblique |
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Which muscles extort? |
Inferior rectus Inferior oblique |
