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Oc Anatomy 1 > Exam 2 > Flashcards

Exam 2 Flashcards

(74 cards)

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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
Cranial nerves of brain stem
1. Oculomotor (3) 2. Trochlea (4) 3. Abducens 6
26
Damage to one oculomotor nucleus for SR will affect (one SR muscle/ both SR muscles)
Both
27
Explain oculomotor pathway
28
Memorize
29
LPS orgin
lesser wing of the sphenoid above the optic canal
30
Smooth muscles of eye lids are innervated by (symp/para)?
Sympathetic
31
Superior tarsal muscles (Muller) Orgin: Insertion: Innervated by symp/para fibers? Inferior Tarsal muscles Orgin: Insertion: Innervated by symp/para fibers?
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
Internuclear ophthalmoplegia on Right MLF causes the patient to be unable to do what action
Unable to Adduct with right eye but convergence is intact
33
Describe horizontal movment coordination
34
Describe vertical movement coordination
35
Describe the coordination eye movement path way for following target. What is this called
36
What tissue makes up the Common tendinous ring
Periorbita
37
What makes up the orbital septum
Periobita anterior extension
38
The trochlea seperates two fat compartments what are they calledf
Preaponeurotic central fat and medial fat pad
39
What causes orbital fat prolapse
Orbital septum is too weak medial inferiorly Or Trauma
40
Connective tissue that covers the globe
Tenons capsule
41
What is the hammock of the eye What is this apart of
Ligament of lockwood or suspensory ligament Part of the bulbar sheath
42
What ligament attaches to the lateral turbercle
Lateral Palpebral ligament
43
What does the medial palpebral ligament attach to
One part on the anterior lacrimal crest and the other on the posterior lacrimal crest
44
Eyebrows on male vs female
Female run above the orbital margin Males run along orbital margin
45
Name branches of facial nerve Which one is for eye brow placment
Temporal **** Zygomatic Buccal Mandibular Cervical
46
Nerve of medial canthus
Infratrochlear nerve
47
Connects to tarsus
Mullers muscle Superior tarsal muscle
48
Palbepral arcades fromed by what
Lateral and medial palpebral arteries
49
External and internal carotid contribution to eye lids
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
Name muscles for eye lid Protract Retract
Protract -orbicularis oculi 1. Orbital portion 2. Palpebral portion A. Rolans B. Horners muscle Retract -mullers -LPS -frontal -retractor of lower lid
51
Palpebral portion of Orbicularis oculi function and antagonsist
Lite blink Antagonist is levator
52
Muscle responsible for forced blink
Orbital portion of the orbicularis oculi
53
horners muscle Fxn: Branches from where: Location:
horners muscle Fxn: drain tears Branches from where: pretarsal of the palpebral orbicularis Location: surrounds the canaliculi
54
Horners muscle Riolan muscle Location Fx Part of what muscle
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
How long does it take for eye lash to gro and replaced
Gorw: 10 weeks Replaced 5 months Top has 100-150 Bottom has 50-75
56
What is madrosis
Loss of eye lashes
57
Nerve responsible for touch blink reflex
Trigeminal V1 ophthalmic : think upper lid - supra trochlea - supra orbital nerve -lacrimal nerve -infratrochlear nerve V2: maxillary: think lower - zygomatico facial - infraorbital
58
Name CN for Dazzle Menace Sound Touch
Name CN for Dazzle - CN 2 Menace - CN 2 Sound - CN 8 Touch - CN5
59
Nerve that innervates conjunctiva for sensation
CNV -V2 maxillary
60
Bells palsy is due to palsy of what nerve
Facial
61
What eye lid muscle is loosely attached to SR
LPS
62
What is Whitnalls ligament
It supports the upper lid by supporting the LPS Switched force from anterior - posterior to superior- inferior
63
Aponeurosis attatchements
Anterior - contiguous with orbital septum Posterior - attatches anterior of tarsal plate
64
Horners syndrom caused by interuption of _______ nervous system causing disruption to __________ muscle
Horners syndrom caused by interuption of ____sympathetic___ nervous system causing disruption to ____mullers______ muscle
65
Muscle that maintains elevation of lids
Muller
66
Lower lids Name the division and what they are analogous too
Outer - LPS Inner - Muller
67
Hordeolum External Internal
Hordeolum External - zeiss or moll infection Internal - MBG infection
68
MCJ is (posterior or anterior) to Meibomian gland orfice why is this important MCJ is (posterior or anterior) to puncta
Posterior to MG , so that lipid can go on hydrophobic skin Anterior to puncta
69
Position of MCJ depends on
Tear film meniscus
70
What does vit a deficiency cause
Decrease in goblet cells causing keratinization
71
For tears What does each secrete What is the purpose of secretions Mucin containing vessicles Goblet Meimbomian glands Krause and wolf
Mucin containing vessicles Glycocaylx Tearfilm stability Goblet Mucin Adherence Meimbomian glands Lipids Prevent evaporation Krause and wolf Aqueous part
72
Name parts of the stroma
Superficial adenoid - loose has alot of lymphocytes @ birth not presnent Adults have this Deep fibrous - blood vessels lymph and nerves
73
What drains into the episcleral venous plexus
Bulbar conj
74
Veins drain into
Palpebral vein And Ophthalmic vein

Oc Anatomy 1 (3 decks)

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