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Oc Anatomy 1 > Exam 2 > Flashcards

Exam 2 Flashcards

1
Q

What is the oculo motor Foramen

A

It is the center of the common tendinous ring

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2
Q

What are the origins for
The rectus muscles

A
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3
Q

-What is the beefiest eye muscle
-Longest thinnest
-shortest
-only muscle with organ at anterior orbit

A

-What is the beefiest eye muscle- MR
-Longest thinnest- SO
-shortest- IO
-only muscle with orgin at anterior orbit - IO

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4
Q

What muscles share muscle sheath with LPS, what movement does this cause

A

SR, when looking up the eye lid lifts

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5
Q

IO
Orgin:
Attachment:
Primary action:
Secondary action:

A

IO
Orgin: maxillary bone
Attachment: lateral/ posterior/ inferior of globe

Primary action: extort
Secondary action: abduct, elevate

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6
Q

SO
Orgin:
Attachment:
Primary action:
Secondary action:

A

SO
Orgin: 1. Lesser wing medial to optic nerve 2. Trochlea
Attachment: superior/ lateral/ posterior of globe

Primary action: intorsion
Secondary action: abduct depress

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7
Q

What eye movements would a pt with optic neuritis have pain with

A

Abduct
Up
Intorsion

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8
Q

Pt OD cant depress, what muscle not working

A

IR SO

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9
Q

Pt left gaze restriction can be due to

A

Neurological: CN VI palsy
Mechanical: MR mechanically restricted

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10
Q

Where is cerebrospinal fluid made? What is it made by?

A

By the choroid plexus in the 4 ventricles

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11
Q

Where are the ventricles located that make CSF

A

3- in diencephalon
4-between pons and medulla
The two lateral ventricles - diencephalon

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12
Q

Interventricular Foramen connects …..

A

Lateral ventricles and 3rd ventricles

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13
Q

Cerebral aqueduct connects …..

A

3rd and 4th ventricles

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14
Q

Describe CSF path way

A

4th ventricle > subarachnoid space> arachnoid granulation (drains back into venous circulation)

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15
Q

Frontal eye field
What does it do?
Where is it located?

A

Frontal eye field
What does it do?
-Eye movement (voluntary and reflex)
-talks to EOM via paramedian pointine reticular (in pons)
Where is it located? Frontal cortex

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16
Q

Striate Cortex
What does it do?
Where is it located?

A

Striate Cortex

What does it do?
-visual processing

Where is it located?
-occipital cortex

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17
Q

LGN

Location? (Name two areas)
What does it do?

A

LGN

Location? (Name two areas)
1. Thalamus
2. Diencephelon
What does it do?
Receives visual info from optic tract

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18
Q

What is connected to pineal gland

A

Hypothalamus

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19
Q

Superior colliculus
What does it do
Where is it located

Inferior colliculus
What does it do
Where is it located

A

Superior colliculus
What does it do
- gets visual info from LGN
-eye movement reflex
-orientation look at object of interest
Where is it located
-midbrain

Inferior colliculus
What does it do
-gets auditory info for reflex
Where is it located
-midbrain

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20
Q

CN III is inbetween what two structures of the midbrain

A

Pons and cerebral peduncle.

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21
Q

What communicates to PPRF

A

Frontal eye field

Superior colliculus

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22
Q

Medulla oblongata houses what nucluei

A

Autonomic reflex center
CN9 through 12

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23
Q

Intracranial HTN leads to what palsy

A

6

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24
Q

Name nuclei of midbrain

Name nuclei of pons

A

Name nuclei of midbrain
1. Oculomotor
2.trochlea
3. accesory oculomotor (edinger westphal)_ para sympathetic inervasion

Name nuclei of pons
CN 5 through 8 (8 is vestibulocochlear)
Paramedian pointine reticular formation (PRRF)

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25
Q

Cranial nerves of brain stem

A
  1. Oculomotor (3)
  2. Trochlea (4)
  3. Abducens 6
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26
Q

Damage to one oculomotor nucleus for SR will affect (one SR muscle/ both SR muscles)

A

Both

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27
Q

Explain oculomotor pathway

A
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28
Q

Memorize

A
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29
Q

LPS orgin

A

lesser wing of the sphenoid above the optic canal

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30
Q

Smooth muscles of eye lids are innervated by (symp/para)?

A

Sympathetic

31
Q

Superior tarsal muscles (Muller)
Orgin:
Insertion:
Innervated by symp/para fibers?

Inferior Tarsal muscles
Orgin:
Insertion:
Innervated by symp/para fibers?

A

Superior tarsal muscles (Muller)
Orgin: LPS inferiorly
Insertion: upper eye lid
Innervated by symp/para fibers? PARA

Inferior Tarsal muscles
Orgin: IR
Insertion: lower eye lid
Innervated by symp/para fibers? PARA

32
Q

Internuclear ophthalmoplegia on Right MLF causes the patient to be unable to do what action

A

Unable to Adduct with right eye but convergence is intact

33
Q

Describe horizontal movment coordination

A
34
Q

Describe vertical movement coordination

A
35
Q

Describe the coordination eye movement path way for following target. What is this called

A
36
Q

What tissue makes up the Common tendinous ring

A

Periorbita

37
Q

What makes up the orbital septum

A

Periobita anterior extension

38
Q

The trochlea seperates two fat compartments what are they calledf

A

Preaponeurotic central fat and medial fat pad

39
Q

What causes orbital fat prolapse

A

Orbital septum is too weak medial inferiorly

Or

Trauma

40
Q

Connective tissue that covers the globe

A

Tenons capsule

41
Q

What is the hammock of the eye

What is this apart of

A

Ligament of lockwood or suspensory ligament
Part of the bulbar sheath

42
Q

What ligament attaches to the lateral turbercle

A

Lateral Palpebral ligament

43
Q

What does the medial palpebral ligament attach to

A

One part on the anterior lacrimal crest and the other on the posterior lacrimal crest

44
Q

Eyebrows on male vs female

A

Female run above the orbital margin
Males run along orbital margin

45
Q

Name branches of facial nerve
Which one is for eye brow placment

A

Temporal **
Zygomatic
Buccal
Mandibular
Cervical

46
Q

Nerve of medial canthus

A

Infratrochlear nerve

47
Q

Connects to tarsus

A

Mullers muscle
Superior tarsal muscle

48
Q

Palbepral arcades fromed by what

A

Lateral and medial palpebral arteries

49
Q

External and internal carotid contribution to eye lids

A

Internal:
-supratrochlear art
-supraorbital art
-medial palpebral art (inferior and superior)
-lateral palpebral art (inf and sup)
-lacrimal

External
-facial art
-infraorbital art (via maxillary artery)

50
Q

Name muscles for eye lid

Protract

Retract

A

Protract
-orbicularis oculi
1. Orbital portion
2. Palpebral portion
A. Rolans
B. Horners muscle

Retract
-mullers
-LPS

-frontal
-retractor of lower lid

51
Q

Palpebral portion of Orbicularis oculi function and antagonsist

A

Lite blink

Antagonist is levator

52
Q

Muscle responsible for forced blink

A

Orbital portion of the orbicularis oculi

53
Q

horners muscle
Fxn:
Branches from where:
Location:

A

horners muscle
Fxn: drain tears
Branches from where: pretarsal of the palpebral orbicularis
Location: surrounds the canaliculi

54
Q

Horners muscle
Riolan muscle

Location
Fx
Part of what muscle

A

Horners muscle
-Location- palpebral orbicularis oculi
-Fx- tear drainage
-Part of what muscle: see above^

Riolan
-Location- palpebral orbicularis oculi
-Fx- tear drainage, exp meimbomian glands, lid to globe so punctum can drain properly
-Part of what muscle: see above^

55
Q

How long does it take for eye lash to gro and replaced

A

Gorw: 10 weeks
Replaced 5 months

Top has 100-150
Bottom has 50-75

56
Q

What is madrosis

A

Loss of eye lashes

57
Q

Nerve responsible for touch blink reflex

A

Trigeminal
V1 ophthalmic : think upper lid
- supra trochlea
- supra orbital nerve
-lacrimal nerve
-infratrochlear nerve
V2: maxillary: think lower
- zygomatico facial
- infraorbital

58
Q

Name CN for
Dazzle
Menace
Sound
Touch

A

Name CN for
Dazzle - CN 2
Menace - CN 2
Sound - CN 8
Touch - CN5

59
Q

Nerve that innervates conjunctiva for sensation

A

CNV -V2 maxillary

60
Q

Bells palsy is due to palsy of what nerve

A

Facial

61
Q

What eye lid muscle is loosely attached to SR

A

LPS

62
Q

What is Whitnalls ligament

A

It supports the upper lid by supporting the LPS

Switched force from anterior - posterior to superior- inferior

63
Q

Aponeurosis attatchements

A

Anterior - contiguous with orbital septum
Posterior - attatches anterior of tarsal plate

64
Q

Horners syndrom caused by interuption of _______ nervous system causing disruption to __________ muscle

A

Horners syndrom caused by interuption of ____sympathetic___ nervous system causing disruption to ____mullers______ muscle

65
Q

Muscle that maintains elevation of lids

A

Muller

66
Q

Lower lids
Name the division and what they are analogous too

A

Outer - LPS
Inner - Muller

67
Q

Hordeolum
External
Internal

A

Hordeolum
External - zeiss or moll infection
Internal - MBG infection

68
Q

MCJ is (posterior or anterior) to Meibomian gland orfice why is this important

MCJ is (posterior or anterior) to puncta

A

Posterior to MG , so that lipid can go on hydrophobic skin

Anterior to puncta

69
Q

Position of MCJ depends on

A

Tear film meniscus

70
Q

What does vit a deficiency cause

A

Decrease in goblet cells causing keratinization

71
Q

For tears
What does each secrete
What is the purpose of secretions

Mucin containing vessicles
Goblet
Meimbomian glands
Krause and wolf

A

Mucin containing vessicles
Glycocaylx
Tearfilm stability

Goblet
Mucin
Adherence

Meimbomian glands
Lipids
Prevent evaporation

Krause and wolf
Aqueous part

72
Q

Name parts of the stroma

A

Superficial adenoid - loose has alot of lymphocytes
@ birth not presnent
Adults have this

Deep fibrous - blood vessels lymph and nerves

73
Q

What drains into the episcleral venous plexus

A

Bulbar conj

74
Q

Veins drain into

A

Palpebral vein
And
Ophthalmic vein

Oc Anatomy 1 (3 decks)

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