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Human Body Systems > Eye and Orbit > Flashcards

Eye and Orbit Flashcards

1
Q

What is contained in the lacrimal canuncle?

A

sebecous glands

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2
Q

What is the lacrimal punctum an opening to?

A

Lacrimal canal

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3
Q

Bones of the orbit

A 
Frontal
Zygomatic
Maxilla
Lacrimal
Sphenoid
Ethmoid
Palatine
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4
Q

Passageways on orbit

A

Optic canal
S. orbital fissure
I. orbital fissure Foramens

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5
Q

Extraocular muscles

A

Medial rectus Superior oblique Lateral rectus
Inferior oblique Superior rectus
Inferior rectus

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6
Q

Innervation of superior oblique

A

trochlear nerve

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7
Q

Innervation of lateral rectus

A

abducens

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8
Q

Innervation of S. rectus, I. rectus, and I oblique

A

Occulomotor

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9
Q

What is inside optic canal?

A

CN2, ophthalmic artery

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10
Q

What is inside S. orbital fissure?

A

CN3, 4, 5, 6

S. ophthalmic vein

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11
Q

What is inside I. orbital fissure?

A

CN5

I. ophthalmic vein

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12
Q

What is within ring in orbit?

A

CN2, 3, 5, 6

Ophthalmic artery – S. ophthalmic vein

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13
Q

Superior rectus M

A

Looks laterally and upwards (elevation, intorsion, and adduction)

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14
Q

Inferior rectus M

A

Looks laterally and downwards (depression, extorsion, and adduction)

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15
Q

Lateral rectus M

A

Looks laterally (abduction)

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16
Q

Medial rectus M

A

Looks medially (adduction)

17
Q

Inferior oblique M

A

Looks medially and upwards (intorsion, depression, and abductor)

18
Q

Superior oblique M

A

looks medially and downwards (extorsion, elevation, and abduction)

19
Q

Arterial supply of extraocular muscles

A

Ophthalmic artery
Central retinal artery Supraorbital artery
Lacrimal artery

20
Q

Central retinal artery

A

Small artery to supply the nerve and retina tissue

21
Q

Central retinal artery occlusion (CRAO)

A

sudden painless loss of vision

22
Q

Intrinsic muscles of the eye

A

ciliary muscle, sphincter pupillae, dilator pupillae

23
Q

Ciliary muscle IM

A

Parasympathetic (CN3)
Lens become round
Constrict ciliary body
Loosen the zonular fibers

24
Q

Sphincter pupillae IM

A

Short ciliary nerve
Parasympathetic (CN3)
Constricts pupil

25
Q

Dilator pupillae

A

Long ciliary nerve
Sympathetic (CNV1)
Dilates pupil

26
Q

Test to see if lateral rectus if damaged

A

Look lateral

27
Q

Test to see if superior rectus if damaged

A

look out then up

28
Q

Test to see if superior oblique if damaged

A

look in then down

29
Q

Test to see if medial rectus if damaged

A

look medial

30
Q

Test to see if inferior rectus if damaged

A

look out then down

31
Q

Test to see if inferior oblique if damaged

A

look in then up

Human Body Systems (17 decks)

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