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Optic Anatomy > export_eyelids > Flashcards

export_eyelids Flashcards

1
Q
  • lines surfaces of bones of orbit

- continuous with periosteum of face

A

Periorbita

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2
Q

Frontalis
origin:

insertion:

innervation:

action:

A

scalp
superior orbital rim

VII (temporal branch)

raise the eyebrow, look of surprise

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3
Q

Corrugator supercili
Origin:

Insertion:

Innervation:

Action:

A

Frontal bone
Skin superior to the medial eyebrow

VII (temporal branch)

moves brow medially, look of concentration

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4
Q

Procerus

Origin:

Insertion:

Innervation:

Action:

A

nasal bone
medial side of frontalis

VII (buccal branch)

pulls the medial brow inferiorly, look of menace

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5
Q

Obicularis Occuli
Origin:

Innervation:

A

medial bony orbit

VII (temporal and zygomatic branch)

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6
Q

Eyelids/ palpebrae

Functions:

A
  • cover the globe for protection
  • move the tears
  • spread the tears
  • produce tear film
  • protect from UV and sweat
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7
Q

Lagophthalmos:

- can result in keratitis, improper tear drainage, corneal ulceration

A

incomplete closure of the eyelids

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8
Q

Space between open eyelids

A

Palpebral Fissure

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9
Q

the inner and outer angles that are formed by the meeting of the upper and lower eyelids

A

Canthus: medial and lateral

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10
Q

Lacrimal papilla
- small elevation on lid margin

contains:

divides lid margin into:

A

puncta

lateral ciliary portion and nasal lacrimal portion

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11
Q

Epicanthus
covers:

found in:

A

caruncle and plica semilunaris

young children of all races, children with developmental problems, and adults of Asian descent

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12
Q

loss of eyelashes

A

madarosis

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13
Q

whitening of the cilia (usually because of age)

A

poliosis

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14
Q

misdirected growth of eyelashes

A

trichiasis

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15
Q

spasmodic contraction of the obicularis

A

blepharospasm

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16
Q

Orbital portion of Obicularis Oculi
Origin/Insertion:

Action:

Opposing muscle:

A

medial bony orbit
closes eye tightly and quickly/reflex

frontalis

17
Q

Palpebral portion
origin:

insertion:

action:

opposing:

A

medial palpebral ligament
half-ellipses in lateral palpebral raphe

closure of eye gently; involuntary blinking

levator

18
Q

Horner’s muscle
origin:

action:

A

lacrimal sac from upper posterior lacrimal crest

compresses canliculi

19
Q

Riolan’s muscle
location:

action:

A

near lid margin posterior to cilia on both sides of meibomian pores
holds lid margin in close contact with globe

20
Q

Levator palpebrea
Origin:

Insertion:

Innervation:

Action:

A

O: lesser wing of sphenoid bone above and anterior to optic foramen. Levator sheath attaches to the sheath of the superior rectus muscle> for coordination of movement (so when you look up with superior rectus, your eyelid opens more)
I: fibres pass between bundles of orbicularis to insert onto the skin and tarsus.

I: CN III (superior division of oculomotor)

A: elevates eyelids

21
Q

Superior palpebral levator divides the lacrimal gland into two lobes:

A

orbital and palpebral

22
Q

Levator has expansions called horns.What is the function of the horns? How are the medial and lateral horns different?

A

Function: provide a firm anchor point for levator to pull off of and give support to lacrimal gland.
Lateral horn: thicker, more firmly attached (pass by lacrimal gland, so must be strong and give it support)

23
Q

Action, origin, insertion and inervation of Muller’s muscle

A

Action: Additional lid elevation, widen palpebral fissure; Origin: levator; Insertion: upper border of tarsal plate; (hugs inside aspect of levator) Innervation: SNS

24
Q

Inferior tarsal muscle
origin:

insertion:

innervation:

action:

A

O: inferior rectus muscle sheath
I: lower conjunctiva and inferior border of lower tarsal plate

I: sympathetic

A: lowers lower lid, widens palpebral fissure

25
Q

Inferior aponeurosis
origin:

insertion:

action:

A

O: expansion of the inferior EOM sheaths
I: inferior edge of the tarsal plate

A: lower lid elevation or depression

26
Q
  • lies between obicularis and tarsal plate

- levator aponeurosis runs through

A

submuscular areolar layer

27
Q

Tarsal Plates
- dense connective tissue

  • superior plate taller than inferior plate

Function:

A

conforms lie to shape of globe, adds rigidity

28
Q

lines the inner surface of the eyelid
- epithelial transition at lid margin between conjunctiva and skin, just posterior to meibomian pores

  • contains goblet cells
A

palpebral conjunctiva

29
Q
  • embedded in tarsal plate
  • long, branching acini
  • duct opens at the eyelid margin
  • produce sebum
  • holocrine gland
A

Meibomian glands

30
Q

distension of meibomian gland with or without inflammation (noninfectious)

A

Chalazion

31
Q

thickened lipid secretion, keratinization of the duct, subsequent reduction in the lipid component to the tear film

A

meibomian dysfunction

32
Q

sebaceous glands

Function: lubricate eyelashes, protection

A

Zeis glands

33
Q
  • serous glands
  • large lumen surrounded by cuboidal cells
  • apocrine gland
  • unclear function
A

Glands of Moll

34
Q

acute inflammation of an eyelid gland due to infection (Staph)
external=

internal=

A

hordeolum
ex: infected Zeis or Moll gland

in: infected meibomian gland

35
Q
  • thin connective tissue
  • starts at orbital margin
  • protection, keeps orbital fat in place
A

orbital septum

Optic Anatomy (2 decks)

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