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Gross II > Test 2: Orbit, Ear > Flashcards

Test 2: Orbit, Ear Flashcards

1
Q

What shape is the eye socket?

A

Pyramidal

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2
Q

4 surfaces of orbit?

A

roof, floor, medial wall, lateral wall

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3
Q

7 bones that form orbital surface?

A

frontal, sphenoid, maxilla, zygomatic, lacrimal, ethmoid, palantine bone

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4
Q

orbital roof is formed by?

A
  1. orbital process (plate) of the frontal bone

2. lesser wing of Sphenoid

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5
Q

floor of orbit is formed by?

A
  1. orbital process of Maxilla
  2. Zygomatic bone
  3. Orbital process of Palantine bone
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6
Q

The orbital process of Maxilla is? (texture)

A

very thin and fragile

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7
Q

medial wall of the orbit is formed by?

A
  1. Frontal bone
  2. Lacrimal bone
  3. Orbital process of Ethmoid bone
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8
Q

Lateral wall of the orbit is formed by?

A
  1. Zygomatic bone

2. Greater wing of Sphenoid

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9
Q

Optic canal goes to?

A

cranial cavity

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10
Q

optic canal opens up at?

A

apex

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11
Q

optic canal is associated with what part of what bone?

A

Lesser Wing of Sphenoid

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12
Q

Optic canal contains?

A

Optic nerve and Ophthalmic artery

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13
Q

Superior orbital fissure goes to?

A

cranial cavity

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14
Q

superior orbital fissure is bordered by?

A

lesser and greater wings of Sphenoid

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15
Q

Superior orbital fissure contains?

A

CN III, IV, VI, V1 (ophthalmic) and superior ophthalmic veins

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16
Q

Inferior orbital fissure goes to?

A

infratemporal and sphenopalantine fossa

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17
Q

Inferior orbital fissure contains?

A

infraorbital n.a.v.

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18
Q

supraorbital foramen contains?

A

supraorbital n.a.v

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19
Q

infraorbital foramen contains?

A

infraorbital n.a.v

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20
Q

infraorbital foramen leads to the floor of the orbit where it is continuous with?

A

the infraorbital groove (sulcus)

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21
Q

infraorbital foramen leads to ?

A

floor of the orbit

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22
Q

ethmoidial foramen contains?

A

ethmoidial n.a.v.

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23
Q

the medial wall of the ethmoidial foramen connects?

A

ethmoid to aircells

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24
Q

nasolacrimal canal goes to?

A

nasolacrimal duct

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25
Q

The thickest wall of the orbit is?

A

Lateral wall

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26
Q

Which wall is exceptionally thin and fragile?

A

Medial wall

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27
Q

Medial wall separates orbit from?

A

ethmoid air cells and nasal cavity

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28
Q

is the roof of the orbit thin?

A

yes

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29
Q

the roof separates the orbit from the?

A

Anterior cranial fossa

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30
Q

The floor is thin and separates the orbit from the?

A

maxillary sinus

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31
Q

Palpebra

A

eyelid

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32
Q

cilia

A

eyelashes

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33
Q

supercillia

A

hair on eyelashes

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34
Q

palpebral fissure

A

opening between palpebrae

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35
Q

describe the skin of the palpebra

A

thin and delicate

36
Q

skin of the Palpebra covers what?

A

the palpebral part of Orbicularis Oculi

37
Q

Canthi

A

edges of palpebral fissure

38
Q

Lateral Canthus aka?

A

Temporal Canthus

39
Q

Medial Canthus aka?

A

Nasal Canthus

40
Q

Medial (nasal) Canthus includes?

A
  1. Lacrimal caruncle

2. Lacrimal puncta

41
Q

lacrimal caruncle

A

fleshy prominance (at medial canthus) which includes sweat and sebecious glands

42
Q

lacrimal papilla

A

bump on superior and inferior palpebra

43
Q

lacrimal puncta

A

pin hole size opening that permits the drainage of lacrimal fluid from cornea

44
Q

Tarsal plates are located deep to?

A

skin and muscle of eyelids

45
Q

Tarsal plates are sheets of?

A

fibrous connective tissue

46
Q

Tarsal plates help to maintain shape of?

A

eyelids

47
Q

Tarsal glands aka?

A

Meibomian Glands

48
Q

Tarsal glands are embedded in?

A

tarsal plates

49
Q

Tarsal glands can be seen if the eyelids are?

A

inverted

50
Q

Tarsal glands are what type of glands?

A

sebaceous glands

51
Q

Tarsal glands secrete what?

A

lipid like secretions

52
Q

Tarsal glands open up along the margins of?

A

the eyelids

53
Q

Tarsal glands secretions spread where?

A

secretions spread along margins of eyelids

54
Q

Tarsal glands are important bc? (2)

A
  1. lubricate margins

2. helps increase surface tension along margins

55
Q

tarsal glands increasing surface tension along margins encourages?

A

Lacrimal fluid to stay on cornea

56
Q

Glands of Moll are?

A

small modified sweat glands

57
Q

Glands of Zeis

A

small modified sebaceous glands

58
Q

Sty aka?

A

hordeolum

59
Q

Sty

A

infected gland of eyelid

60
Q

Chalazion

A

plugged gland (cyst like structure)

61
Q

Conjunctiva

A

transparent covering of mucous membrane

62
Q

Conjunctiva has 2 portions

A
  1. Palpebral portion

2. Bulbar portion

63
Q

Palpebral portion of the conjunctiva ?

A

covers inner surface of eyelid

64
Q

Bulbar portion reflects onto

A

bulb or eyeball

65
Q

Bulbar portion is continuous with?

A

outer cornea

66
Q

recesses of conjunctiva

A

Fornices (superior and inferior)

67
Q

Fornicies

A

where the palpebral conjunctiva meets the bulbar conjunctiva

68
Q

Lacrimal gland looks like?

A

almond

69
Q

Lacrimal gland location

A

superolateral position of the anterior orbit

70
Q

Lacrimal gland secretes

A

Lacrimal fluid

71
Q

Lacrimal gland secretes lacrimal fluid through?

A

series of ducts into cornea

72
Q

Crying is called?

A

Lacrimation

73
Q

Lacrimal gland secretes what fluid?

A

serious/ watery fluid

74
Q

Lacrimal gland function

A

circulate fluid across corneal surface and across inner eyelids

75
Q

What moistens, cleans, lubercates and protects cornea surface?

A

lacrimal fluid

76
Q

Lacrimal gland innervation

A

parasympathetic and sympathetic

77
Q

Lacrimal gland Parasympatheric fibers are?

A

secretomotor

78
Q

Lacrimal gland Parasympatheric, secretomotor fibers control?

A

lacrimation

79
Q

Lacrimal glands: Preganglionic parasympathetic fibers ?

A

CN VII branch (Greater Petrosal n.)

80
Q

Lacrimal gland: postganglionic parasympathetic fibers associated with?

A

Sphenopalitine/ pteropalantine ganglion

81
Q

Lacrimal gland sympathetic fibers go to?

A

aa. of the gland

82
Q

Lacrimal gland sympathetic fibers are?

A

vasomotor innervation

83
Q

Lacrimal gland sympathetic fibers: postganglionic sympathetic neurons associated with?

A

Superior Cervical ganglion of the sympathetic chain

84
Q

Nasolacrimal Conducting System secretes?

A

lacrimal fluid

85
Q

Nasolacrimal Conducting System secretes lacrimal fluid by?

A

by a series of small ducts onto superolateral eyeball

86
Q

Nasolacrimal Conducting System: blinking does what to lacrimal fluid

A

distributes it towards the medial canthus

87
Q

lacrimal fluid drains off what after being distributed towards medial canthus?

A

cornea

Gross II (1 decks)

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