Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

Anat II: Orbit > Orbit > Flashcards

Orbit Flashcards

(70 cards)

Start Studying
1
Q

Opens up at apex of orbit to cranial cavity
Associated with the lesser wing of the Sphenoid
Contents: CN II (optic nerve) & Ophthalmic artery

A

Optic Canal

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

Bordered by the lesser and greater wings of the sphenoid…goes to cranial cavity
Contents: III, IV, V, VI and superior ophthalmic veins

A

Superior orbital fissure

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

Goes to the infratemporal and sphenopalatine fossa

Contents: infraorbital n, a, v.

A

Inferior orbital fissure

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

Contains supraorbital n,a, v

A

Supraorbital foramen

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

Leads to the floor of the orbit where it is continuous with the infraorbital groove (sulcus)
Contains infraorbital bundle

A

Infraorbital foramen

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

On the medial wall of the orbit connects to ethmoid air cells
Contains ethmoidal bundle

A

Ethmoidal foramina

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

Contains nasolacrimal duct

A

Nasolacrimal canal

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

Formed by the orbital process (plate) of the frontal bone and the lesser wing of sphenoid bone

Relatively thin and separates the orbit from the Anterior cranial fossa

A

Roof of the orbit

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

Formed by the orbital process of the maxillae (Very thin and fragile), Zygomatic bone, and the orbital process of the Palatine bone

Quite thin and separates the orbit from the Maxillary sinus

A

Floor of the Orbit

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

Small part of the orbital floor near the apex

A

Orbital process of the Palatine bone

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

Formed by the frontal process of maxilla, Lacrimal bone, and the Orbital process of the Ethmoid bone

Exceptionally thin and fragile - separates orbit from ethmoid air cells and nasal cavity

A

Medial wall of the Orbit

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

Formed by the Zygomatic bone and the greater wing of the Sphenoid bone

Thickest/strongest surface of orbit because by side of head (most vulnerable area)

A

Lateral wall of the orbit

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

Palpebra

A

Eyelid

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

Cilia

A

Eyelashes

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

Supercilia

A

Hairs of eyebrows

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

Edges of the palpebral fissure

Lateral = temporal
Medial = nasal
A

Canthi

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

Fleshy prominence at medial canthus; includes sweat and sebaceous glands

A

Lacrimal caruncle

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

Fleshy bump on superior and inferior palpebrae

A

Lacrimal papilla

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

At lacrimal papilla; a pinhole opening that permits draining of lacrimal fluid (tears) of cornea

A

Lacrimal puncta

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

Deep to skin and muscle of eyelids
Plates or sheets of dense fibrous connective tissue
Helps to maintain the shape of the eyelids

A

Tarsal Plates

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

Meibomian glands
Embedded in tarsal plates
Can be seen if eyelids are inverted
Modified sebaceous glands - lipid like secretions
Open up along the margins of the eyelids
Functions: secretions to spread along margins of eyelids: lubricate the margins and increase surface tension

A

Tarsal glands

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

Ciliary gland - small sweat glands

A

Glands of Moll

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

Ciliary gland: small sebaceous glands

A

Glands of Zeis

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

Hordeolum

Infected gland of the eyelid

A

Sty

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Plugged gland becomes big cyst-like structure
Chalazion
26
Covering of mucus membrane (transparent) has 2 portions: Palpebral - covers the inner surface of the eyelids Bulbar - reflects onto the "bulb" eyeball and continuous with outer cornea
Conjunctiva
27
Recesses of the conjunctiva | Inferior and superior - where the palpebral conjunctiva meets the bulbar conjunctiva
Fornices
28
Structures responsible for secreting lacrimal fluid through a series of ducts
Nasolacrimal Apparatus
29
Size and shape of almond Located in superolateral position of the anterior orbit Secretes lacrimal fluid through a series of ducts onto the cornea Process = lacrimation of serous/watery fluid Functions: circulate across the corneal surface and across the inner eyelids, and moistens cleans and lubricates "protection"
Lacrimal gland
30
Secretomotor - control lacrimation Preganglionic parasympathetic fibers: VII n. branch - greater petrosal n. Postganglionic parasympathetic neurons associated with sphenopalatine ganglion
Parasympathetic (fibers) Innervations of lacrimal gland
31
Vasomotor innervation | Postganglionic sympathetic neurons associated with superior cervical ganglion of the sympathetic chain
Sympathetic fibers innervation of lacrimal gland
32
Secretion of lacrimal fluid by series of small ducts onto the superolateral eyeball where it is distributed towards the medial canthus by blinking - drains off the cornea through lacrimal puncta to lacrimal canaliculi to lacrimal sac to nasolacrimal duct which opens into the inferior meat is of the nasal cavity
Nasolacrimal conducting system
33
Periosteal layer of orbital fascia lining the orbit encapsulates all orbital structures and easily separates from the bones of the orbit
Periorbita
34
Orbital fascia Outer meningeal layer of the optic nerve Follows the optic nerve to the posterior eyeball where it becomes continuous with the sclera of the eyeball
Orbital Dura
35
Helps maintain the position of orbital structures (packing material) Helps fork soft socket for the eyeball
Orbital fat
36
Smooth thin membranous layer of fascia of orbital fat posterior to eyeball
Tenons capsule = fascia bulbi
37
Potential space between the sclera and the tenons capsule
Episcleral space
38
4 Extrinsic eyeball muscles (Lateral, Medial, Inferior, and Superior) All originate near the posterior orbit from a common tendon = Annulus tendineous/ Common tendon of Zinn
Recti muscles
39
Ring-like tendon | Located at the apex of the orbit near the optic canal and the superior orbital fissure
Annulus tendineous = Common tendon of Zinn
40
I : lateral sclera of the eyeball N: VI (abducens) A: pure action- abduction of eye (away from midline)
Lateral rectus m.
41
I: medial sclera of eyeball N: III oculomotor n. A: fairly pure - Adduction
Medial Rectus m.
42
I: Sclera of the inferior aspect of the eyeball (ant./med. to vertical axis) N: III oculomotor n. A: Depression (principle), Adduction, and Extorsion (lateral rotation)
Inferior Rectus
43
I: Superior sclera (ant/med to vertical axis) N: III oculomotor A: elevation (principle), Adduction, Intorsion (medial rotation)
Superior rectus m.
44
O: body of sphenoid bone above annulus tendineous at orbital apex I: tendon of insertion passes through the trochlea and inserts to the sclera on the superior/lateral eyeball I: IV (trochlear n.) A: Depression (principle), Abduction, Medial rotation (Intorsion)
Superior Oblique m.
45
O: Floor of the orbit at the anteromedial aspect I: lateral and posterior aspect of the eyeball N: III oculomotor A: elevation (principle), abduction, Extorsion (lateral rotation)
Inferior Oblique m.
46
Fibrocartilaginous loop or sling of tissue | Located on the anterosuperomedial aspect of the orbit
Trochlea
47
Medial rectus Superior rectus Inferior rectus
Adductors of eyeball
48
Inferior oblique Superior oblique Lateral rectus
Abductors of eye
49
Inferior oblique | Superior rectus
Elevators of eye
50
Superior oblique | Inferior rectus
Depressors of eye
51
Superior oblique Inferior oblique Superior rectus Inferior rectus
Rotators of eye
52
Superior rectus | Superior oblique
Medial rotators
53
Inferior rectus | Inferior oblique
Lateral rotators
54
O: orbital apex - passes over the superior orbit I: Superior tarsal plate/ superior palpebra N: III oculomotor A: Elevate the superior eyelid/palpebra (if paralyzed eyelid will droop -ptosis)
Levator Palpebra Superioris
55
``` Accessory muscles of the orbit Muscles of the eyelids Smooth muscle N: Postganglionic sympathetic fibers A: assist in elevating the sup. palpebrum and depressing the inf. palpebrum ```
Tarsal muscles (inf. & sup.)
56
Genioglossus
Extrinsic tongue muscle Fan-shaped O: Genion of mandible I: Tongue N: XII n. A: Billateral - Protrude and depress tongue Unilateral - tongue deviate towards contralateral side when protruding
57
Styloglossus
``` Extrinsic tongue muscle O: Styloid process I: Tongue N: XII n. A: retract and elevate tongue ```
58
Hyoglossus
``` Extrinsic tongue muscle O: Hyoid bone I: Tongue N: XII n. A: Retract & depress tongue ```
59
Palatoglossus
``` Extrinsic tongue muscle O: Palate I: Tongue (side) N: X n. A: Fauces sphincter & elevates tongue ```
60
Levator Veli Palatini
O: Temporal bone and Eustacian tube cartilage I: Soft palate A: Elevate & retract palate N: X n. muscle of palate
61
Tensor Veli Palatini
O: Sphenoid bone & Eustachian tube cartilage I: Soft palate A: tighten and flattens soft palate N: V3 (mandibular) muscle of palate
62
Musculus Uvulae
O: hard palate I: Uvula of soft palate A: elevates uvula N: X n. muscle of palate
63
Palatoglossus
O: Palate I: tongue (side) A: Sphincter of fauces and elevates tongue N: X n. muscle of palate
64
Palatoglossal fold
fold of mucous membrane covers palatoglossus m.
65
Palatopharyngeus
O: Hard and soft palate I: lateral wall of pharynx A: elevates the pharynx (swallowing m.) N: X n. muscle of palate
66
Palatopharyngeal fold
mucous membrane covers palatopharyngeal muscle
67
O: medial surface of lateral pterygoid plate of sphenoid bone I: Medial surface of ramus of mandible @ angle A: Elevates, contralaterally deviates and protracts mandible N: medial pterygoid n. of V3
Medial Pterygoid
68
O: inf- Lateral surface of lateral pterygoid plate Sup- greater wing of the sphenoid I: neck of mandibular condyle, TMJ capsule and articulate disc A: Depresses, contralaterally deviates and protracts the mandible N: lateral pterygoid n. of V3
Lateral Pterygoid
69
O: Zygomatic arch I: Lateral surface of mandibular ramus A: Elevates and protrude the mandible N: Masseteric nerve of V3
Masseter
70
O: Temporal fossa I: Coronoid process of mandibular ramus A: Elevates and retracts the mandible N: Deep Temporal nerves of V3
Temporalis

Anat II: Orbit (1 decks)

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