Orbit 1

Question 1

Roof of the orbit is ____

Answer 1

horizontal

Question 2

Roof is mostly formed by?

Answer 2

Orbital part of frontal bone

Question 3

At the supraorbital margin, supraorbital notch or foramen transmits the ____ ____ of the ____ n.

Answer 3

supraorbital branch of the frontal n

Question 4

Shallow depression anterolaterally, _____ ____ - for ____ gland

Answer 4

lacrimal fossa - lacrimal

Question 5

The floor is mainly?

Answer 5

Maxilla

Question 6

Maxilla contains?

Answer 6

Infraorbital groove
Infraorbital canal
Infraorbital foramen

Question 7

What structure is paper-thin portion of ethmoid bone that separates the orbit from underlying ethmoid cells?

Answer 7

Lamina Papyracea

Question 8

Lacrimal groove is located in which wall of the orbit?

Answer 8

Medial wall

Question 9

The upper and lower eyelids contain a dense connective tissue called?

Answer 9

Tarsal plate

Question 10

The name of the enclosed potential space of the eyelids is called?

Answer 10

Conjunctival sac

Question 11

Superior and inferior tarsal plates merge to form?

Answer 11

Medial and lateral palpebral ligaments

Question 12

Facial sheet that attaches the tarsal plates to the inferior and superior orbital margins?

Answer 12

Orbital septum

Question 13

Levator palpebrae superioris muscle is innervated by?

Answer 13

Superior division of the oculomotor nerve (CN III)

Question 14

Paralysis produces ____ or ____, with inability to lift the eyelid.

Answer 14

ptosis or blepharoptosis

Question 15

Superior tarsal muscle is AKA

**small and seperate portion of the levator palpebral superioris m

Answer 15

Muller’s muscle

Question 16

Contraction of the Superioris tarsal muscle accentuates the opening of the palpebral fissure as?

Answer 16

Wide-eyed fear

Question 17

Innervation of the Superioris tarsal muscle?

Answer 17

Sympathetic division of the autonomic nervous system

Question 18

Lack of muscle tone because of decreased sympathetic activity or decreased circulating levels of EPINEPHRINE results in difficulty keeping eyes open “(____ ____)”.

Answer 18

tired eyes

Question 19

Lesion of the Superior tarsal muscle?

Causes paralysis of this muscle with a slight drooping of the eyelid called?

Answer 19

Horner’s syndrome

Pseudoptosis

Question 20

How many layers do the eyelids have?

Answer 20

7

Question 21

Skin of the eyelids contain what type of glands?

Answer 21

sweat and sebaceous glands

Question 22

Sebaceous glands associated with eyelashes are known as?

Answer 22

ciliary glands

Question 23

Obstruction of these glands results in a?

Answer 23

Stye

Question 24

A ____ is a rather painful condition in which the ducts of these glands become blocked.

Answer 24

Chalazion

Question 25

Lacrimal ducts drain into the?

Answer 25

Superior fornix

Question 26

Vasodilation in response to allergy, irritation or inflammation produces?

Answer 26

Bloodshot eye and pinkeye

Question 27

Bulbar (corneal) conjunctiva is innervated by which CN?

Answer 27

Ophthalmic division of Trigeminal N

Question 28

Which reflex allows to test afferent portion of CN V and efferent portion of CN VII

Answer 28

Corneal (blink) reflex

Question 29

Name the triangular area at the medial canthus where the tears collect?

Answer 29

Lacus lacrimalis (L.)

Question 30

Lacrimal lake is enclosed by?

Answer 30

Plica semilunaris **In some animals known as the 3rd eyelid

Question 31

Name of the fleshy elevation seen in the medial angle of the eye within the lacrimal lake.

Answer 31

Lacrimal caruncle

Question 32

Orfice of the lacrimal apparatus is formed by small lacrimal papilla with an apical?

Answer 32

lacrimal punctum

Question 33

Preganglionic parasympathetic fibers conveyed from ____ ____ by the ____ ____ ____ and then by the nerve of ____ ____ to the ____ ____.

Answer 33

facial nerve/ greater petrosal nerve/pterygoid canal/pterygopalatine ganglion

Question 34

Postganglionic parasympathetic fibers travel with ____ n (from ____ n of __) to the lacrimal branch of the ____ n __.

Answer 34

zygomaticotemporal n (from maxillary nerve V2)/ ophthalmic nerve VI

Question 35

Are there any synapses in the geniculate ganglion?

Answer 35

NO

Question 36

Greater petrosal n =

Answer 36

Preganglionic Parasympathetic (VII)

Question 37

Deep petrosal n =

Answer 37

PostG Symp (TI)

Question 38

Lesser petrosal n =

Answer 38

PregPara (IX)

Question 39

Postganglionic sympathetics fibers travel with ____ ____ ____ and ____ ____ n; join the parasympathetic fibers to form the ____ of ____ ____ and traverse the nerve ____ ____ (without synapsing).

Answer 39

internal carotid plexus and deep petrosal nerve; nerve of pterygoid canal; ptheygopalatine ganglion

Question 40

Miosis = | **Dilator pupillae***

Answer 40

chronic constricted pupil

Question 41

Anhydrosis =

Answer 41

not able to sweat on affected side

Question 42

Red/Flushed due to?

Answer 42

Chronic vasodilation