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Anatomy > Eye & Orbit > Flashcards

Eye & Orbit Flashcards

1
Q

Fascia that extends from periosteum into upper and lower lids

A

Orbital septum and Tarsal plates

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2
Q

Structures embedded within the tarsal plates that secrete a sebaceous fluid into the palpebral fissure to prevent lacrimal fluid from running onto the face

A

Tarsal glands (Meibomian glands)

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3
Q

Tissue that anchors the tarsal plates medially to the maxilla

A

Medial palpebral ligament

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4
Q

Tissue that serves as an origin for the orbicularis oculi muscle

A

Medial palpebral ligament

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5
Q

Tissue that anchors the tarsal plates laterally to the zygomatic bone

A

Lateral palpebral ligament

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6
Q

Innervation to orbicularis oris muscle

A

CN VII

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7
Q

Origin of levator palpebrae superioris

A

Bony orbital roof

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8
Q

Insertion of levator palpebrae superioris

A

Superior eyelid and tarsal plate

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9
Q

Action of levator palpebrae superioris

A

Elevates the upper eyelid

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10
Q

Innervation of levator palpebrae superioris

A

CN III

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11
Q

Loss of this nerve causes ptosis (drooping of upper eyelid)

A

CN III (oculomotor)

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12
Q

Terminal branch of V1 that passes through supraorbital foarmen
Innervates upper lid region

A

Supraorbital nerve

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13
Q

Terminal branch of V2 that passes through infraorbital foramen
Innervates lower lid region

A

Infraorbital nerve

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14
Q

Arteries and veins of the superficial eye (4)

A

Supraorbital artery and vein
Infraorbital artery and vein
Facial artery and vein (angular part)
Superficial temporal artery and vein

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15
Q

The supraorbital artery/vein are terminal branch of this

A

Ophthalmic artery/vein

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16
Q

The infraorbital artery/vein are terminal branch of this

A

Maxillary artery/vein

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17
Q

Secretes the fluid onto the eye surface through small ductules located in the fornix of the upper eyelid

A

Lacrimal gland

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18
Q

Location of the lacrimal gland

A

Upper lateral region of anterior orbit

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19
Q

Location of lacrimal punctum

A

Medial margin of eyelids

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20
Q

Serves as the opening of the lacrimal canaliculi

A

Lacrimal punctum

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21
Q

The lacrimal punctum serves as the opening of this

A

Lacrimal canaliculi

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22
Q

Small canals that join the lacrimal sac

A

Lacrimal canaliculi

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23
Q

Receives lacrimal fluid from the lacrimal canaliculi

A

Lacrimal sac

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24
Q

The lacrimal sac receives lacrimal fluid from this

A

Lacrimal canaliculi

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25
Q

Passes inferiorly from the lacrimal sac and terminates by opening into the nasal cavity

A

Nasolacrimal duct

26
Q

Bones of the orbit (6)

A

Frontal, sphenoid, zygomatic, maxillary, lacrimal, ethmoid

27
Q

Contents of the superior orbital fissure (6)

A

CN III, CN IV, CN V1, CN VI, superior ophthalmic vein, sympathetic fibers

28
Q

Contents of the inferior orbital fissure (3)

A

CN V2 and infraorbital artery and vein

29
Q

Contents of the optic canal (2)

A

CN II and ophthalmic artery (branch of internal carotid)

30
Q

The ophthalmic artery is a branch of this

A

Internal carotid

31
Q

Foramen of the orbit that contains CN III, CN IV, CN V1, CN VI, and superior ophthalmic vein

A

Superior orbital fissure

32
Q

Foramen of the orbit that contains nerve CN V2 and infraorbital artery and vein

A

Inferior orbital fissure

33
Q

Foramen of the orbit that contains CN II and ophthalmic artery

A

Optic canal

34
Q

Origin of levator palpebrae superioris

A

Roof of orbit posteriorly

35
Q

Insertion of levator palpebrae superioris

A

Upper lid

36
Q

Origin of the superior, inferior, medial, and lateral rectus muscles

A

Annular tendon

37
Q

Insertion of the superior, inferior, medial, and lateral rectus muscles

A

Sclera of eyeball

38
Q

Origin of superior oblique muscle

A

Annular

39
Q

Insertion of superior oblique muscle

A

Sclera (trochlear apparatus in between)

40
Q

Origin of inferior oblique muscle

A

Anterior medial orbit

41
Q

Insertion of inferior oblique muscle

A

Sclera of eyeball

42
Q

Sensory nerves of the orbit (3)

A

Branches of ophthalmic nerve V1 of the trigeminal nerve:
Frontal nerve
Lacrimal nerve
Nasociliary nerve

43
Q

Sensory nerve to the orbit that bifurcates into supraorbital and supratrochlear nerves

A

Frontal nerve

44
Q

The frontal nerve bifurcates into these two nerves

A

Supraorbital and supratrochlear nerves

45
Q

Sensory nerve to the orbit located near the midline in orbit

A

Frontal nerve

46
Q

Sensory nerve to the orbit located laterally in orbit

A

Lacrimal nerve

47
Q

Sensory nerve to the orbit located medially in orbit

A

Nasociliary nerve

48
Q

Sensory nerve to the orbit that gives rise to ciliary nerves, posterior and anterior ethmoidal branches, and ends as infratrochlear nerve

A

Nasociliary nerve

49
Q

The nasociliary nerve ends as this nerve

A

Infratrochlear nerve

50
Q

Motor nerves of the orbit (3)

A

Oculomotor CN III
Trochlear CN IV
Abducens CN VI

51
Q

Motor nerve of orbit that supplies all extraocular muscles (including levator palpebrae superioris) except the lateral rectus and superior oblique

A

Oculomotor nerve CN III

52
Q

Motor nerve of orbit that supplies the superior oblique muscle

A

Trochlear nerve CN IV

53
Q

Motor nerve of orbit that supplies the lateral rectus muscle

A

Abducens nerve CN VI

54
Q

Innervation to extraocular muscles except the lateral rectus and superior oblique

A

Oculomotor nerve CN III

55
Q

Innervation to the superior oblique muscle

A

Trochlear nerve CN IV

56
Q

Innervation to the lateral rectus muscle

A

Abducens nerve CN VI

57
Q

Autonomic innervation of the orbit

A

Parasympathetic and sympathetic

58
Q

Vein of the orbit that drains the facial vein and continues posterioly into cavernous sinus

A

Superior ophthalmic vein

59
Q

Infections from the face region can spread to the base of the brain by this route

A

Superior ophthalmic vein

60
Q

Vein of the orbit that continues posteriorly with the pterygoid plexus of the infratemporal fossa via the inferior orbital fissure

A

Inferior ophthalmic vein

61
Q

The superior ophthalmic vein continues posteriorly into the cavernous sinus through this

A

Superior orbital fissure

62
Q

The inferior ophthalmic vein continues posteriorly via this

A

Inferior orbital fissure

Anatomy (23 decks)

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