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Ocular Anatomy Lab > Ocular Anatomy - Lab 2 Summary of Structures > Flashcards

Ocular Anatomy - Lab 2 Summary of Structures Flashcards

1
Q

periosteum

A

connective tissue layer that covers all surface of the bones

contains nerves and blood vessels that provide innervation and nutrients to the bone

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2
Q

periorbita

A

extensions of the periosteum into the bones of the orbit

connective tissue layer that covers all surface of the bones of the orbit

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3
Q

common tendinous ring

A

AKA annulus of Zinn
the thickening of the periorbita at the orbital apex
origin of the 4 rectus muscles
attaches to the greater and lesser wings of the sphenoid

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4
Q

Levator palpebrae superioris

A

Action: elevate the eyelid

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5
Q

Extraocular muscles

A 
LR
SR
IR
MR
SO
IO
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6
Q

Superior rectus

A

Origin: common tendinous ring and the periosteal layer of the dura mater surrounding the optic nerve
Action: elevate, intort, adduct

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7
Q

lateral rectus

A

Origin: common tendinous ring
Action: abduct

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8
Q

medial rectus

A

Origin: common tendinous ring and the periosteal layer of the dura mater surrounding the optic nerve
Action: adduct

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9
Q

inferior rectus

A

Origin: common tendinous ring
Action: depress, extort, adduct

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10
Q

superior oblique

A

Origin: lesser wing of the sphenoid bone
Action: Intort, depress, abduct

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11
Q

inferior oblique

A

Origin: floor of the orbit on the maxillary bone, just lateral to the opening for the nasolacrimal canal
Action: Extort, elevate, abduct

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12
Q

Structures that pass through the SOF and above the common tendinous ring

A 
L.F. STUNALI
Lacrimal nerve
frontal nerve
superior ophthalmic vein
trochlear nerve
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13
Q

Structures that pass through the SOF and through the common tendinous ring

A 
L.F. STUNALI
Upper division of CN III
Nasociliary Nerve
Abducens Nerve
Lower division of CN III
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14
Q

Structures that pass through the SOF and below the common tendinous ring

A

L.F. STUNALI

Inferior ophthalmic vein

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15
Q

structures that pass through the optic canal and through the common tendinous ring

A

Optic Nerve

Ophthalmic artery

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16
Q

Describe the relationship of the EOMs and nerves to the walls of the orbit

A 
Roof:
   Supraorbital nerve
   Levator palpebrae superioris
   Superior Oblique
   Superior rectus
   Superior Oblique tendon
   (supratrochlear nerve is more medial than the above)
Lateral Wall:
   Lacrimal nerve
   Lateral Rectus
Floor:
   Inferior rectus
   Inferior oblique
   infraorbital nerve
Medial Wall
   Superior oblique
   Infratrochlaer nerve (more medial than the muscles)
   Medial rectus
17
Q

describe the structures that may be damaged by trauma to the walls of the orbit because they lie adjacent to them

A

see last card

18
Q

Order of insertions of the rectus muscles

A 
SLIM (posterior to anterior)
Superior
Lateral
Inferior
Medial
(SO and IO insert furthest)

Ocular Anatomy Lab (4 decks)

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