Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Vision Science > EOMs Basic Anatomy > Flashcards

EOMs Basic Anatomy Flashcards

You may prefer our related Brainscape-certified flashcards:
Biology 101 flashcards
1
Q

what protects the eyes?

A

deep bony orbits

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

what shape is the orbit?

A

roughly pyramidal in shape

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

what is the thick, bony roof composed of?

A

frontal bone & a portion of the lesser wing of sphenoid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

what is the lateral wall composed of?

A

zygomatic bone & greater wing of sphenoid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

what is the thin, medial wall composed of?

A

maxillary, lacrimal, ethmoid, & sphenoid bones

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

what walls of the orbit are parallel to each other?

A

medial walls

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

the plane of lateral wall in each orbit is how many degrees from the sagittal plane formed by the medial wall?

A

45°

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

the geometry of the orbital bones requires that both globes have to be?

A

partially adducted in primary gaze

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

what is the maintenance of eye position in primary gaze requires a constant steady-state resting level of tension in all the EOMs?

A

tonus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

what are the three major foramina at the apex of the bony orbit?

A

optic foramen, superior & inferior orbital fissures

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

where is the optic foramen found?

A

within the lesser wing of sphenoid & orbital apex

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

what runs through the optic foramen?

A

CN2 & ophthalmic artery

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

what is the 7th skeletal muscle in the orbit & what is it’s function

A

LPS → elevates palpebral fissure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

where do the 4 recti muscle originate?

A

common tendinous ring (annulus of Zinn)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

what is the progressive spiral that the recti muscles form & where is it located?

A

Spiral of Tillaux → around corneal limbus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

rank the recti from closest to furthest from to the limbus

A

medial, inferior, lateral, superior

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

what does the muscle-scleral insertion line look like?

A

horseshoe configuration

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

where does the superior oblique originate?

A

arises from sphenoid bone just superior to tendinous ring

19
Q

where does the inferior oblique originate?

A

from orbital floor, just lateral to the lacrimal fossa

20
Q

what are the anatomic & physiologic origins & insertion of the superior oblique?

A

anatomic → lesser wing of sphenoid
physiologic → trochlea
inserts at superior, posterior, lateral globe

21
Q

origin & insertion of medial rectus

A

common tendinous ring & optic nerve sheath → anterior globe

22
Q

origin & insertion of lateral rectus

A

common tendinous ring & greater wing of sphenoid → anterior globe

23
Q

origin & insertion of superior rectus

A

common tendinous ring & optic nerve sheath → superior, anterior globe

24
Q

origin & insertion of inferior rectus

A

common tendinous ring → inferior, anterior globe

25
Q

origin & insertion of inferior oblique

A

medial maxillary bone → inferior, posterior, lateral globe

26
Q

blood supply to the lateral rectus

A

lacrimal artery & lateral muscular branch of ophthalmic artery

27
Q

blood supply to the medial rectus

A

medial muscular branch of the ophthalmic artery

28
Q

blood supply to the superior rectus

A

lateral muscular branch of the ophthalmic artery

29
Q

blood supply to the inferior rectus

A

medial muscular branch of the ophthalmic artery

30
Q

blood supply to the inferior oblique

A

infraorbital artery & medial muscular branch of ophthalmic artery

31
Q

blood supply to the superior oblique

A

superior muscular branch of the ophthalmic artery

32
Q

innervation of lateral rectus

A

CN6

33
Q

innervation of medial rectus

A

CN3 inferior branch

34
Q

innervation of superior rectus

A

CN3 superior branch

35
Q

innervation of inferior rectus

A

CN3 inferior branch

36
Q

innervation of superior oblique

A

CN4

37
Q

innervation of inferior oblique

A

CN3 inferior branch

38
Q

innervation of LPS

A

CN3

39
Q

what helps keep the eyelid raised along with LPS?

A

Muller’s muscle

40
Q

origin & insertion of Muller’s

A

underside of LPS → superior tarsal plate of lid

41
Q

innervation of Muller’s

A

from the sympathetic nervous system

42
Q

what syndrome is associated with Muller’s?

A

Horner’s

43
Q

which EOM is closest to the limbus

A

medial

Vision Science (9 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions