Brainscape's Knowledge GenomeTM

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


See full index

Complete Review Course > Fundamentals Vol. 1 > Flashcards

Fundamentals Vol. 1 Flashcards

1
Q

How many short ciliary nerves are there in each eye?

A

Approx. 6 to 10

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

What is the order that the rectus muscles insert into the globe, starting closest to the limbus?

A

Medial rectus, Inferior rectus, Lateral rectus, Superior rectus (Think “MILS”)

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

What is the name of the imaginary line drawn through the insertion sites of the rectus muscles?

A

Spiral of Tillaux

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

What is the insertion site of the medial rectus muscle?

A

5.5 mm from the medial limbus

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

What is the insertion site of the inferior rectus muscle?

A

6.5 mm from the inferior limbus

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

What is the insertion site of the lateral rectus muscle?

A

6.9 mm from the lateral limbus

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

What is the insertion site of the superior rectus muscle?

A

7.7 mm from the superior limbus

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

What is the blood supply to the medial rectus muscle?

A

Inferior muscular branch of the ophthalmic artery

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

What is the blood supply to the inferior rectus muscle?

A

Inferior muscular branch of the ophthalmic artery and infraorbital artery

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

What is the blood supply to the lateral rectus muscle?

A

Lacrimal artery

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

What is the blood supply to the superior rectus muscle?

A

Superior muscular branch of the ophthalmic artery

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

What is the blood supply to the superior oblique muscle?

A

Superior muscular branch of the ophthalmic artery

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

What is the blood supply to the inferior oblique muscle?

A

Inferior muscular branch of the ophthalmic artery and infraorbital artery

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

What is the longest extraocular muscle?

A

Superior rectus (41.8 mm)

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

What is the shortest extraocular muscle?

A

Inferior oblique (37 mm)

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

What is the the only extraocular muscle without a tendon at Its Insertion?

A

Inferior oblique

17
Q

What extraocular muscle has the longest tendon?

A

Superior oblique (20 mm)

18
Q

What Is the orgin of the superior oblique muscle?

A

Body of the sphenoid bone (Medial to optic foramen, between the annulus of Zinn and the periorbital)

19
Q

Where does the superior oblique muscle insert?

A

Under the superior rectus muscle, posterior to the center of rotation

20
Q

What is the origin of the inferior oblique muscle?

A

Orbital floor of the maxillary bone near the lacrimal fossa

21
Q

Where does the inferior oblique muscle insert?

A

Posterior, Inferior temporal quadrant at the level of the macula

22
Q

What extraocular muscle has the shortest tendon?

A

Medial rectus

23
Q

What muscles does the superior division of CN Ill innervate?

A

Levator palpebra and superior rectus muscle

24
Q

What muscles does the inferior division of CN Ill lnnvervate?

A

Medial rectus, inferior rectus, and inferior oblique muscle

25
Q

What is the ratio of nerve fibers to muscle fibers of the extraocular muscles?

A

1:3 to 1:5 (compared to 1:50 of skeletal muscle)

26
Q

What type of muscle fibers are unique to extraocular muscles?

A

Slow, tonic type (Felderstruktur)

27
Q

What are the slow, tonic fibers of extraocular muscles useful for?

A

Smooth pursuit

28
Q

What is the origin of the levator palpebrae muscle?

A

Lesser wing of the sphenoid (superior to the annulus of Zinn)

29
Q

What type of nerve endings do the slow, tonic fibers of the extraocular muscles have?

A

Multiple, grapellke nerve endings (en grappe)

30
Q

What type of nerve endings do the fast twitch fibers of the extraocular muscles have?

A

Platelike nerve endings (en plaque)

31
Q

What type of nerve endings do the fast, twitch fibers of the extraocular muscles have?

A

Platelike nerve endings (en plaque)

32
Q

What do the fast, twitch fibers of the extraocular muscles aid with?

A

Rapid, saccadic movements

Complete Review Course (27 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions