Fundamentals Vol. 2 Flashcards Preview

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Flashcards in Fundamentals Vol. 2 Deck (34):
1

What is the length of the average adult palpebral fissure?

27 to 30 mm

2

What is the height of the average adult palpebral fissure?

8 to 11 mm

3

By how much does the average elevator muscle raise the upper eyelid?

15 mm

4

By how much does the average frontalis muscle raise the eyelid?

2 mm

5

What is the innervation of the levator muscle?

CN Ill

6

Where is the thinnest skin of the body located?

Eyelid

7

Where does the levator aponeurosis have its firmest attachment?

On the anterior aspect of the tarsus about 3 mm superior to the eyelid margin

8

Which lacrimal punctum is located more medially?

Superior punctum

9

What structure corresponds to the avascular plane of the eyelid?

Gray line

10

What structure corresponds with the most superficial portion of the orbicularis muscle?

Gray line

11

What is the name of the muscle associated with the gray line?

Muscle of Riolan

12

Which facial muscle has fibers with the smallest diameter?

Orbicularis oculi

13

What is the innervation of the facial muscle?

CN VII

14

Which portion of the orbicularis oculi muscle functions solely as a voluntary muscle?

Orbital portion

15

Which portion of the orbicularis oculi muscle functions voluntary and involuntary in spontaneous and reflex blinking?

Palpebral portion

16

Which portion of the orbicularis oculi muscle plays a role in drainage of tears?

Pretarsal portion

17

What are the only apocrine glands of the orbit?

Glands of Moll

18

What is the mode of secretion of sebaceous glands?

Holocrine secretion

19

What is the function of the Glands of Moll?

Sweat secretion

20

What is the function of the goblet cells?

Mucus secretion

21

What is the function of the meibomian glands and Glands of Zeiss?

Oil secretion

22

What lies just posterior to the orbital septum in the eyelids?

Orbital fat

23

What is the attachment site of the orbital septum in the eyelids?

Levator aponeurosis

24

What is the origin of the levator palpebrae muscle?

Lesser wing of the sphenoid

25

Where does the levator palpebrae muscle divide into the levator aponeurosis and Muller's muscle?

Near Whitnall's ligament

26

What is the innervation of the levator palpebrae muscle?

Superior division of CN Ill

27

What is the origin of the analogue to Muller's muscle in the lower eyelid?

Capsulopalebral head of the inferior rectus muscle

28

What is the attachment of Muller's muscle?

Upper border of the tarsus

29

What type of muscle is Muller's muscle?

Smooth, non-striated muscle

30

What is the average width of the tarsal plate?

29 mm

31

What is the innervation of Muller's muscle?

Sympathetic fibers

32

What are the tarsal plates composed of?

Dense connective tissue

33

What is the average thickness of the tarsal plate?

1 mm

34

What is the mode of secretion of lacrimal glands?

Exocrine secretion