Orbital Vasculature Part II Flashcards

1
Q

What are the arteries of the eyebrows

A
  • supratrochlear artery (medial part or brow)

- supraorbital artery (lateral part of brow)

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2
Q

What are the veins that drain the eyebrows

A
  • supratrochlear vein (medial)
  • supraorbital vein (lateral)

Both veins drain to either the angular vein or superior ophthalmic vein

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3
Q

Arteries of the palpebrae

A
  • lacrimal artery

- ophthalmic artery and branches

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4
Q

What are the branches of the lacrimal artery associated with the palpebrae

A

Superior lateral palpebral artery

  • peripheral palpebral artery
  • marginal palpebral artery

Inferior lateral palpebral artery

  • peripheral palpebral artery
  • marginal palpebral artery
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5
Q

What are the branches of the superior lateral palpebral artery associated with the palpebrae

A

Peripheral palpebral artery and marginal palpebral artery

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6
Q

What are the branches of the inferior lateral palpebral artery

A

Peripheral palpebral artery

Marginal palpebral artery

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7
Q

What are the branches of the ophthalmic artery associated with the palpebrae

A
  • superior medial palpebral artery (and its peripheral and marginal branches)
  • inferior medial palpebral artery ( and its peripheral and marginal branches)
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8
Q

Medial and lateral marginal and peripheral palpebral arteries anastomose to form what

A

The peripheral and marginal palpebral arcades in each palpebral

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9
Q

How do the medial and lateral marginal and peripheral palpebral arteries course

A

Between orbicularis oculi muscle and tarsal plate

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10
Q

Vertical collateral branches of the medial and lateral marginal and peripheral palpebral arteries

A

Connect peripheral and marginal arcades and course on either side of the tarsal plate

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11
Q

Branches posterior to the tarsal plate supply what

A

Palpebral conjunctiva, giving it a reddish pink hue

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12
Q

Veins of palpebral

A
  • superficial temporal vein (lateral part of palpebral)

- angular vein, superior and inferior ophthalmic veins (medial part of palpebrum)

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13
Q

Lymph vessels of the palpebrae

A

Lymph from the lateral 2/3rds of the upper nad lower palpebrum drains into the preauricular lymph nodes, which lymph from the medial 1/3rd is drained to the submandibular nodes

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14
Q

forniceal conjunctival arterial supply

A

Branches from peripheral palpebral arcade

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15
Q

forniceal conjunctival venous supply

A

Small tributaries that drain into anterior ciliary veins

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16
Q

Arterial supply of the bulbar conjunctiva

A
  • posterior conjunctival arteries arising from peripheral palpebral arcade
  • anterior conjunctival arteries arising from anterior ciliary arteries
17
Q

Where are the anterior conjunctival arteries situated

A

Between corneal limbus and posterior conjunctival arteries

  • superficial pericorneal plexus (conj)
  • deep pericorneal plexus (episclera)
18
Q

Venous supply of the bulbar conjunctiva

A

Small tributaries that drain into anterior ciliary vein

19
Q

Lymphatic of he bulbar conjunctiva

A
  • lateral conj drains into the preauricular lymph nodes

- medial conj drains into the submandibular lymph nodes

20
Q

What is the cornea dependent upon

A

Aqueous humor, tear film, pericorneal plexus

21
Q

What kind of vasculature does the cornea have

A

None, its avascular

22
Q

Avascular structure, exceptions are episcleral plexus, deep scleral plexus, and intrascleral plexus

A

Sclera

23
Q

Arterial supply of choroid (posterior uvea)

A
  • short posterior arteries via posterior scleral aperture
  • distribute in suprachoroidal space out to equator of the eye
  • anastomose with recurrent branches of long posterior ciliary arteries
  • neuro regulated
  • 85% of total ocular blood volume
24
Q

Where is 85% of total ocular blood volume?

A

Short posterior ciliary arteries in the choroid

25
Q

Venous drainage of the choroid

A

Vortex veins

26
Q

Arterial supply of the ciliary body (intermediate uvea)

A
  • long posterior ciliary arteries pierce sclera and course anterior in suprachoroid to ciliary body
  • join perforating branches of anterior ciliary arteries to form the major arterial circle of the iris (located in ciliary body, not iris!)
  • recurrent branches supply choroid to equator
27
Q

Venous supply of ciliary body (intermediate uvea)

A

Vortex veins

28
Q

Arterial supply to iris

A
  • radial arteries distribute in stroma of iris to form minor arterial circle of the iris around the iris collarette
  • part of blood-aqueous-barrier
29
Q

Venous supply of iris

A

Vortex veins

30
Q

Vasculature of crystalline lens

A

Non, avascular

31
Q

Vasculature of vitreous humor

A

None avascular

32
Q

Arterial supply of optic nerve

A

-plial plexus from small branches of the ophthalmic artery and central retinal artery

33
Q

Venous supply of the optic nerve

A

Venous pial plexus. Drains into central retinal vein

34
Q

Arterial supply of retina

A

Dual vascular supply

35
Q

What is the inner retinal layers supplied by (artery)

A

Central retinal artery

36
Q

What is the arterial supply to the outer retinal layer (photoreceptors)

A

Supplied by choroidal vasculature

37
Q

Communication between retinal arterial system and choroidal systme

A

None except in the cilioretinal artery

38
Q

Venous supply of retina

A

Central retinal vein