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ANATOMY > HEAD & NECK: THE EYES, ORBIT & THE ORBITAL REGION > Flashcards

HEAD & NECK: THE EYES, ORBIT & THE ORBITAL REGION Flashcards

1
Q

functions of eyelids

A

protection (injury and excessive light)
secretion, distribution & drainage of tears

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2
Q

which eyelid is more mobile among the two?

A

superior/ upper eyelid

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3
Q

what is the elliptical opening between the two eyelids called?

A

palpebral fissure

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4
Q

structure that serves as an entrance to conjunctival sac

A

palpebral fissure

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5
Q

superficial covering of eyelids

A

skin

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6
Q

mucous membrane covering the deep surface of eyelids

A

conjunctiva

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7
Q

lymphatic drainage of eyelids

A

lateral 2/3rd - preauricular/ superficial parotid LNs
medial 1/3rd - submandibular LNs

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8
Q

sebaceous gland that opens into eyelash follicles

A

glands of zeis

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9
Q

modified sweat glands that open separately between adjacent lashes

A

glands of moll (ciliary glands)

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10
Q

modified sebaceous glands that pour oil onto the margin of eyelashes

A

tarsal glands

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11
Q

function of tarsal glands secretion

A

prevents overflow of tears
helps airtight closed eyelids

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12
Q

small space that separates eyeball from medial angle

A

lacus lacrimalis

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13
Q

structure present in center of lacus lacrimalis

A

lacrimal caruncle (reddish yellow elevation)

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14
Q

reddish semilunar fold on the lateral side of caruncle

A

plica semilunaris

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15
Q

small elevation near the medial angle of eye

A

lacrimal papilla

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16
Q

small hole on the summit of lacrimal papilla

A

lacrimal punctum

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17
Q

lacrimal punctum leads into

A

lacrimal canaliculus

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18
Q

function of lacrimal papilla and lacrimal punctum

A

carry tears into nose

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19
Q

structures that pierce the upper lateral part of superior fornix

A

ducts of lacrimal gland

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20
Q

parts of conjunctiva

A

palpebral conjunctiva
bulbar conjunctiva

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21
Q

structure binding bulbar conjunctiva to underlying sclera

A

tenon’s capsule

22
Q

groove beneath the eyelid

A

subtarsal sulcus

23
Q

clinical importance of subtarsal sulcus

A

traps small foreign particles

24
Q

fibrous sheet that forms the framework of eyelids

A

orbital septum

25
Q

orbital septum is thickened at the margins to form

A

superior and inferior tarsal plates

26
Q

lateral and medial ends of tarsal plates are attached to bones by _______

A

lateral & medial palpebral ligament

27
Q

muscle covering the superficial surface of tarsal plates and orbital septum

A

orbicularis oculi (palpebral fibres)

28
Q

tarsal glands location

A

posterior surface of tarsal plates

29
Q

extrinsic muscles of eyeball

A

superior rectus
inferior rectus
lateral rectus
medial rectus
superior oblique
inferior oblique

30
Q

intrinsic muscles of eyeball

A

sphincter pupillae of iris
dilator pupillae of iris
ciliary muscles

31
Q

nerve supply of sphincter papillae and ciliary muscle

A

parasympathetic via oculomotor nerve

32
Q

ciliary muscle action

A

controls lens shape, makes lens more globular

33
Q

muscles of eyelids

A

orbicularis oculi
levator palpebrae superioris

34
Q

components of lacrimal apparatus

A

lacrimal gland + lacrimal ducts

35
Q

lacrimal ducts are found in

A

lacrimal fossa formed by frontal bone

36
Q

parts of lacrimal gland

A
  • LARGE ORBITAL PART
  • SMALL PALPEBRAL PART
37
Q

where are the two parts of lacrimal glands continuous

A

around the lateral edge of the Aponeurosis of the Levator Palpebrae Superioris

38
Q

where does lacrimal gland open

A

lateral part of
the superior fornix of the Conjunctiva

39
Q

how many ducts of lacrimal gland open into eye

A

12

40
Q

lacrimal gland nerve supply

A

sensory - lacrimal nerve (ophthalmic)
parasympathetic - greater petrosal nerve (facial)
sympathetic - deep petrosal nerve (internal carotid plexus)

41
Q

lacrimalis canaliculi opens into

A

lacrimal sac

42
Q

lacrimal sac is upper blind end of

A

nasolacrimal duct

43
Q

nasolacrimal duct opens into

A

Inferior Meatus of the nose

44
Q

function of lacrimal fold

A

prevents air flow into lacrimal sac on blowing nose

45
Q

orbital margin formed by

A

frontal bone
zygomatic bone
maxilla

46
Q

roof of orbit by

A

orbital plate of frontal bone

47
Q

lateral wall of orbit by

A

zygomatic bone
greater wing of sphenoid bone

48
Q

floor of orbit by

A

orbital plate of maxilla

49
Q

medial wall of orbit by

A

frontal process of maxilla
orbital plate of ethmoid
lacrimal bone
body of sphenoid

50
Q
A

ANATOMY (4 decks)

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