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22 Cards in this Set
- Front
- Back
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Larcrimal Gland
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is over the superolateral part of orbital fossa. produces tears.
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Larcrimal puncta
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tears drain across eyes to puncta
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Nasolacrimal duct
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(opening into the inferior nasal meatus) membranous canal from lacrimal sac to inferior meatus in lateral wall of nose. This is why tears come out of your nose when you cry.
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Muscles of the Eye orbit
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levator palpebrae-most superior muscle of eyelid
2. medial rectus(immediately below the superior oblique 3. lateral rectus 4. superior rectus 5. inferior rectus 6. superior oblique 7. inferior oblique |
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levator palpebrae superioris (M)
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A: raisies upper eye lid
N: oculomotor (III) supplies striated muscle fibers and sympathetic fibers supply smooth muscle fibers |
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horner syndrome
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Ptosiss(eyelid drupping in pateint)
This means the sympathetic system got infected and is affecting the levator palebrae superioris (m) |
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Miosis
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This is when the pupil gets constricted on the horner syndrome side.
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Medial Rectus (m)
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A: addcuts eyeball (medially pulls eye
N: CN III oculomotor |
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Lateral Rectus (m)
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A: abducts eyeball
N: abducecent (VI) |
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superior Rectus (m)
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A: elevates and adducts eyeball to look superomedially
N: CN III oculomotor this muscle is immideatly underneath the levator palpebrae |
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Inferior Recuts (M)
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A: depresses and abducts eyeball to look inferomedially (like looking at a book)
N: CN III oculomotor |
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Superior Oblique (M)
Note: proximal part of This muscle is good for tagging |
A: depresses and abducts eyeball to look inferolaterally
N: Trochlear (IV) |
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Inferior Oblique (M)
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A: elevates and abducts eyeball to look superolatrally
N: CN III oculomotor |
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Next set is nerves and related structures
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see following cards
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Ophthalmic dvision of trigeminal (V1)
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Has Fontal N; which is largest branch of V1
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Frontal N:
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The frontal nerve branches form the supraorbital and supratrochlear Nn
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Trochlear (iv) N
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supplies the superior obique M
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Abducens (VI)
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supplies the lateral rectus
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oculomotor (III)
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supplies superior rectus, levator palpebrae superioris, medial rectus, inferior rectus and inferior oblique
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Optic(II)
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surrounded by extensions of the 3 meninges and by common annular tendon. the central A of retina enters optic N about 1/2 way along its length
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Vessels of orbit
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ophthalmic A and V- from internal carotid passes through optic canal.
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In geriatric patients what is common
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macular degeneration may be resulted from the decreased blood supply to the retina. caused by lack of blood being supplied by ophthalmic a and v.
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