Exam 7 Eye Special Senses 72X Flashcards Preview

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Flashcards in Exam 7 Eye Special Senses 72X Deck (107)
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1

Name the accessory structures of the eye?

Eyelids
Eyelashes
Eyebrows
Lacrimal Apparatus
Extrinsic Eye Muscles

2

What is the term used for the upper and Lower eyelids?

Palpebrae

3

What muscle is responsible of moving the upper eyelid?

Levator Palpebrae Superioris

4

What is the space between the upper and lower eyelids termed?

Palpebral Fissure

5

What term is used for the angles of the palpebral fissures?

Medial Commissure
Lateral Commissure

6

What is contained in the medial commissure?

Lacrimal Caruncle
-Sebaceous (oil) Glands
-Sudoriferous (Sweat) Glands

7

Name the structures of the eyelid from superficial to deep?

-Epidermis
-Dermis
-Subcutaneous
Tissue
-Fibers of Orbicularis Oculi Muscle
-Tarsal Plate
-Tarsal Glands
-Conjunctiva

8

What is the name of the structure of the eye that is a thick fold of connective tissue that gives form and support to the eyelid?

Tarsal Plate

9

Tarsal Glands (Meibomian Glands) Characteristics?

-Modified Sebaceous Glands in ea Tarsal Plate.
-Secrete fluid that prevent eyelids from adhering to ea other

10

What is the thin, protective mucous membrane composed of stratified columnar epithelium w/many goblet cells?

Conjunctiva

11

What lines the inner aspect of the eyelids?

Palpebral Conjunctiva

12

What conjunctiva is on the anterior surface of the eyeball? What does it cover?

Bulbar conjunctiva (AKA Ocular Conjunctiva)
-Sclera, but not the cornea

13

What is the group of structures that produces and drains lacrimal fluid or tears? What is Lacrimal Fluid composed of?

Lacrimal Apparatus
-Watery Solution: Salts, Mucus, and lysozyme (bactericidal enzyme)

14

Describe the process of tear (Lacrimal Fluid) production to drainage?

-Lacrimal Glands secrete Lacrimal Fluid
-Drains through excretory lacrimal duct onto conjunctiva of upper lid
-Tears pass medially over eyeball
-Enter Lacrimal Puncta (two)
-Pass into Lacrimal Canals (Two) (Superior and Inferior)
-Enter Lacrimal Sac
-Enter Nasolacrimal Duct
Enter Nasal Cavity

15

Name the six Extrinsic eye Muscles?

Superior Rectus
Inferior Rectus
Lateral Rectus
Medial Rectus
Superior Oblique
Inferior Oblique

16

What is significant about the neurons and how they are able to permit smooth, precise, rapid movements of the eyes?

Serve only two or three muscle fibers (commonly 8-12)

17

Which muscles preserve the rotational stability of the eyeball?

Oblique Muscles
-Superior Oblique
-Inferior Oblique

18

How many Cardinal directions of eye movement are there and name the directions?

8
-Superior (up)
-Inferior (down)
-Nasal (in)
-Temporal (out)
-Up and In
-Up and Out
-Down and In
-Down and Out

19

What term is used to refer to the name of the six Cardinal Directions of eye movement associated w/a single extrinsic muscle? Name the Muscle and Direction?

Cardinal Directions Of Gaze
-Superior Rectus: Up and In
-Medial Rectus: In
-Inferior Rectus: Down and In
-Superior Oblique: Down and Out
-Lateral Rectus: Out
-Inferior Oblique: Up and Out

20

What are the muscles involved and directions of movement for the two Cardinal Directions that involve two muscles working in concert?

Superior Rectus and Inferior Oblique: UP
Inferior Rectus and Superior Oblique: Down

21

Name the Cranial Nerve Involved in the Cardinal Directions of Gaze for all Inward movements and the Up and Out movement?

CN-III (Oculomotor Nerve)
-Inferior Oblique: Up and Out
-Superior Rectus: Up and In
-Medial Rectus: In
-Inferior Rectus: Down and IN

22

What cranial nerve and muscle are involved in the Down and Out Cardinal Directions of Gaze Movement of the eye?

CN-IV (Trochlear Nerve)
-Superior Oblique: Down and Out

23

Name the Muscle and Cranial Nerve for the Cardinal Direction of Gaze eye movement of In?

Medial Rectus
Oculomotor Nerve (CN-III)

24

Name the Muscle and Cranial Nerve for the Cardinal Direction of Gaze eye movement of Down and Out?

Superior Oblique
Trochlear Nerve (CN-IV)

25

Name the Muscle and Cranial Nerve for the Cardinal Direction of Gaze eye movement of Up and In?

Superior Rectus
Oculomotor Nerve (CN-III)

26

Name the Muscle and Cranial Nerve for the Cardinal Direction of Gaze eye movement of Out?

Lateral Rectus
Abducens Nerve (CN-VI)

27

Name the Muscle and Cranial Nerve for the Cardinal Direction of Gaze eye movement of Up and Out?

Inferior Oblique
Oculomotor Nerve (CN-III)

28

Name the Muscle and Cranial Nerve for the Cardinal Direction of Gaze eye movement of Down and In?

Inferior Rectus
Oculomotor Nerve (CN-III)

29

Name the Muscle and Cranial Nerve for the Cardinal Direction of eye movement for Up?

Superior Rectus and Inferior Oblique
Oculomotor Nerve (CN-III)

30

Name the Muscle and Cranial Nerve for the Cardinal Direction of eye movement for Down?

Inferior Rectus and Superior Oblique
Oculomotor Nerve (CN-III) and
Trochlear Nerve (CN-IV)