Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

Gross Anatomy Exam 4 > Orbits > Flashcards

Orbits Flashcards

1
Q

Periorbita

A

Orbital fascia

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

Bony walls of the orbit

A 
Frontal bone
Sphenoid
Maxillary
Palatine
Lacrimal
Ethmoid
Zygomatic
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

How does CN V2 travel through the orbit

A

Inferior orbital fissure - infraorbital groove (maxillary bone) - infraorbital foramen - face, teeth

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

What structures run through the optic canal?

A

Optic nerve

Opthalmic artery

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

What structures run through the superior orbital fissure?

A

V1
Oculomotor
Trochlear
Abducens

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

Sclera

A

White wall of eye

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

Lacrimal caruncle

A

Small mass of mucous membrane at medial corner of eye

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

Superior/inferior lacrimal puncta

A

Small openings above and below caruncle for collection of tears

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

Tarsal plates

A

Bands of connective tissue that strengthen the eyelids

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

Lacrimal canaliculi

A

Transports tears from lacrimal puncta to lacrimal sac

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

Lacrimal sac

A

Collects tears

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

Nasolacrimal duct

A

Drains tears into nasal cavity

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

Cornea

A

Transparent anterior surface of the eye

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

Lens

A

Focuses light on the retina

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

Retina

A

Posterior lining of the eye with specialized photoreceptors

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

Posterior cavity of the eye

A

Cavity posterior to the lens

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

Vitreous body

A

Transparent, gelatinous substance within posterior cavity

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

Anterior cavity of the eye

A

Space anterior to the lens

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Anterior chamber of the eye

A

Space between cornea and iris

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Aqueous humor

A

Clear, watery fluid in anterior cavity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Posterior chamber of the eye

A

Space between lens and iris

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Ciliary muscle

A

Smooth muscle that changes shape of lens

Contraction = loosen suspensory ligaments = lens thickens

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Suspensory ligament (eye)

A

Connects ciliary muscle to capsule of lens

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Sphincter pupillae

A

Circular smooth muscle that affects size of pupil
Works in conjunction with dilator pupillae
Contraction = constrict pupil
N: parasympathetics (Oculomotor CN III)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Canal of Schlemm
Drains fluid from anterior cavity | Between angle of cornea and iris
26
What causes glaucoma?
Blockage of the canal of Schlemm
27
Conjuctiva
Mucous membrane of anterior eye and eyelids | Sits on top of cornea and folds over to inside of eyelid
28
Levator palpebrae superioris
Skeletal muscle that elevates upper eyelid
29
Superior tarsal (Mueller’s) muscle
Smooth muscle that helps elevate the upper eyelid
30
Dilator pupillae
Smooth muscle that controls size of pupil with sphincter pupillae Contraction = dilation of pupil Controlled by sympathetics
31
What shape is the lens for distant vision?
Flattened - ciliary muscle relaxed
32
What shape is the lens for closeup vision?
Thickened - ciliary muscle contracted
33
Fovea
Depression in retina that represents area of highest visual acuity
34
Common tendinous ring
A fibrous cuff at the apex of the orbit The 4 recti muscles arise from here Surrounds the optic canal and part of the superior orbital fissure
35
Superior rectus
Common tendinous ring - superior aspect of eyeball A: elevate, adduct N: oculomotor (III)
36
Inferior rectus
Common tendinous ring - inferior aspect of eyeball A: depress, adduct N: oculomotor (III)
37
Medial rectus
Common tendinous ring - medial eye A: adduct N: oculomotor (III)
38
Lateral rectus
Common tendinous ring - lateral eye A: abduct N: abducens (VI)
39
Superior oblique
body of sphenoid bone - medial aspect of orbit - trochlea - superior eye A: depression, abduct N: trochlear (CN IV)
40
Inferior oblique
anterior/medial part of the floor of the orbit - inferior eye A: Elevate, abduct N: oculomotor (CN III)
41
Levator palpebrae superioris
lesser wing of sphenoid bone (near optic canal) - superior tarsus (upper eyelid) A: raises upper eyelid N: oculomotor (III)
42
Ptosis
drooping of the upper eyelid
43
The lateral retina gets visual information from the _______ field of vision and projects onto the _______ side of the brain
the lateral retina gets visual info from the MEDIAL field of vision and projects onto the SAME SIDE of the brain
44
the medial retina recieves information from the _______ visual field and project onto the _______ side of the brain
the medial retina recieves info from the LATERAL visual fields and projects onto the OPPOSITE SIDE of the brain
45
Right optic nerve lesion
cause complete blindness in right eye
46
optic chiasm lesion
would lose function of the medial retina - cannot see both lateral fields of vision
47
Right optic tract lesion
Lose function of the right lateral retina and the left medial retina Lose vision of the right medial view and the left lateral view
48
How do parasympathetics of the oculomotor nerve (III) travel to the lens and pupil?
synapse in the ciliary ganglion - short ciliary nerves - eyeball
49
Branches of the opthalmic division of trigeminal (V1)
frontal nasociliary lacrimal
50
Frontal nerve
Branch off of opthalmic division of trigeminal (V1) Splits into supraorbital and supratrochlear Sensation from forehead
51
Nasociliary nerve
Branches into anterior and posterior ethmoidal - sensation from ethmoid air cells, nasal cavity and bridge of nose (external nasal nerve) Turns into infratrochlear when it exits orbit - sensation from skin around medial eye Sensation from cornea Also branches into long ciliary nerves
52
Lacrimal nerve
Sensation from skin outside the eye | Also used by facial nerve to get parasympathetics to lacrimal gland
53
Long ciliary nerves
Branch from nasociliary nerve (v1) - back of eye Medial side of optic nerve Carry sympathetic and sensory fibers
54
Short ciliary nerves
Ciliary ganglion - back of eye Lateral to optic nerve Carry sympathetic, parasympathetic, and general sensory nerve fibers
55
How does the maxillary division of trigeminal (V2) travel through the orbit?
**Does nothing in the orbit | Gives rise to zygomatic nerve in lateral orbit and travels along floor as infraorbital nerve
56
Which branches of the maxillary division of trigeminal (V2) carry sensation from the skin of the face?
V2 branches into zygomatic | Zygomatic branches into zygomatico temporal, zygomaticofacial, and infraorbital nerves
57
superior alveolar nerves
branch of maxillary divison of trigeminal (V2) | Sensation from mx teeth
58
Main artery of the orbit
ophthalmic artery
59
Name branches of the opthalmic artery (which is a branch off of internal carotid)
``` lacrimal supraorbital supratrochlear anterior/posterior ethmoidal ciliary central retinal ```
60
name the arteries that form collateral circulation around the outside of the orbit
``` supraorbital supratrochlear angular infraorbital transverse facial superficial temporal ```
61
Describe the path of venous drainage from the orbit
superior/inferior ophthalmic veins drain into cavernous sinus posteriorly drain into pterygoid plexus inferiorly
62
what provides a pathway of the spread of infection from the face to the venous sinuses?
communication of angular (facial) vein and opthalmic veins
63
What can be some consequences of blowout fractures
medial and inferior walls of orbit are very thin Blow to the eye = contents of orbit (esp. periorbital fat) may enter sinuses medial protrusion - ethmoid sinuses inferior herniation - maxillary sinuses

Gross Anatomy Exam 4 (8 decks)

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