Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Anatomy Lab Module 1 > Module 1 Orbit And Eye > Flashcards

Module 1 Orbit And Eye Flashcards

0
Q

Origin of Levator palpebrae superioris

A

Elevation of upper eyelid

Innervated by occulomotor nerve

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

Origin of inferior oblique

A

Elevation of eyeball (look up)

Lateral rotation of eyeball (look outward)

Innervated by occulomotor nerve

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

Origin of superior oblique

A

Depression of eyeball (look down)

Abduction of eyeball (look out)

Medial rotation if eyeball

Innervated by trochlear nerve

Eyeball rotation is limited around the anterior posterior axis

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

Origin of medial rectus

A

Addiction of eyeball (looking in)

Innervated by occulomotor nerve

Common tendinous ring is a fibrous band inside the orbit that surrounds the optic canal and part of superior orbital fissure

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

Origin of inferior rectus

A

Depression of eyeball (look down)
Addiction of eyeball (look in)
Lateral rotation of eyeball

Innervated by occulomotor nerve

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

Common tendinous ring

A

Located on posterior orbit

Fibrous ring that surrounds structures entering orbit through optic canal and medial part of superior orbital fissure

Origin of rectus muscles of eye

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

Origin of lateral rectus

A

Abduction of eyeball (looking out)

Innervated by abducens nerve

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

Origin of superior rectus

A

Elevation of eyeball (look up)
Adduction of eyeball (look in)
Medial rotation of eyeball

Innervated by occulomotor nerve

Eyeball rotation is limited movement

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

Orbital surface of the frontal bone

A

Roof of orbital

Has anterolateral fossa for lacrimal gland

Entire orbital roof formed by frontal bone and lesser wing of the sphenoid bone

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

Orbital plate of ethmoid bone

A

Medial wall of the orbit

Thin walled smooth lateral surface of ethmoid bone that forms large part of medial wall of orbit

Covers middle and posterior ethmoidal air cells

Aka lamina papyracea

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

Sphenoid bone

A

Unpaired irregular bone of the skull that resembles a butterfly

Contains sella turcica

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

Orbital surface of maxilla

A

Orbit floor, smooth bony plate

Forms medial and anterior boundaries of inferior orbital fissure

Floor of orbit susceptible to blow out fracture following anterior blunt force to eye (fist, elbow, baseball)

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

Fossa for lacrimal sac

A

Shallow depression that contains lacrimal sac and continues inferiorly with nasolacrimal duct

Lacrimal sac collects tear fluid from lacrimal canaliculi

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

Superior orbital fissure

A

Located in posterior region of orbit and middle cranial fossa

Oblique fissure bordered by sphenoid bone and frontal bone

Connects orbit with middle cranial fossa, transmits occulomotor, trochlear, and abducens nerves as well as branches of the opthalmic nerve

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

Optic canal

A

Short canal connecting orbit with middle cranial fossa

Transmits optic nerve and opthalmic artery

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

Eye

A

Globe like structure composed of three layers (fibrous, vascular, and neural)
Fibrous is cornea and sclera
Vascular is choroid, ciliary body, and iris
Neural is retina and pigment epithelium

Optical components collect and focus light while neural portions process and transmit light driven signals to the brain

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

Inferior rectus muscle

A

Depression of eyeball, Adduction of eyeball, lateral rotation of eyeball

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

Inferior oblique muscle

A

Elevation of eyeball, lateral rotation of eyeball

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

Superior rectus muscle

A

Elevation of eyeball, Adduction of eyeball, medial rotation of eyeball

Eyeball rotation is a limited movement

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

Medial rectus muscle

A

Adduction of eyeball

20
Q

Superior oblique muscle

A

Depression of eyeball, abduction of eyeball, medial rotation of eyeball

21
Q

Optic nerve (CN II)

A

Provides for vision

Connects to lateral Geniculate nucleus of thalamus

Retinal ganglion pathway- optic nerve- optic chiasm- optic tract- brainstem nuclei

22
Q

Trochlea of superior oblique

A

Anterior medial wall of orbit

Fibrous loop through which tendon of superior oblique muscle passes
Redirects tendon from medial wall of orbit to superior aspect of eye

23
Q

Central retinal artery

A

Passes through optic canal with each optic nerve, pierces optic nerve and courses to retina

Blockage may cause blindness

24
Q

Optic disk

A

Where retina meets optic nerve

Circular to oval area composed of optic fibers that form optic nerve

Central retinal artery enters eye through optic disk

Lack of photoreceptors in disk creates blind spot in visual field

25
Q

Choroid

A

In vascular layer of eye

Contains dark brown pigment melanin

Gives blood supply to outer part of neural retina and prevents light reflections in the eye

26
Q

Retina

A

Inner layer of the eye

Outer pigmented layer immediately inside choroid, inner neural layer contains photoreceptors and associated neurons

Photoreceptors are sensory neurons that respond to light, axons form optic nerve and connect eye to brain

27
Q

Sclera

A

Fibrous layer of eye

Outer layer of posterior 5/6 of eye axe of dense collagenous connective tissue

Protects eye and maintains eye shape

“White of the eye”

28
Q

Posterior cavity of the eye

A

Posterior to the lens and it’s ligaments

Cavity of eye occupied by vitreous humor

Maintains normal intraoccular pressure and shale of the eye, maintains lens and retina in place, refracts light

Aka vitreous chamber

29
Q

Orna serrata

A

Serrated anterior margin of neural portion of retina

30
Q

Lens

A

Located posterior to iris

Biconvex lens composed of cells called lens fibers that refracts light and focuses light onto neural retina

31
Q

Suspensory ligaments of lens

A

Located between ciliary body and lens

Transparent elastic fibers that suspend the lens from the ciliary body and connects ciliary muscle to lens

Permits thickness of lens to change with contraction and relaxation of ciliary muscle

Contraction of ciliary muscle relaxes ligaments and thickens lens
Relaxation of ciliary muscle tenses ligaments and thins lens

32
Q

Ciliary body

A

Vascular layer of eye composed of ciliary muscle and ciliary processes

Angular ciliary smooth muscle controls tension of suspensory ligaments to adjust thickness of lens, ciliary processes produce aqueous humor

33
Q

Scleral venous sinus

A

Aka canal of schlemm

Oval cleft that collects aqueous humor from anterior chamber for reabsorption into venous system

34
Q

Iris

A

Colored part of eye that regulates pupil size in response to light

Contains pupillary constrictor and dilator muscles

Constrictor is parasympathetic while dilator is sympathetic

35
Q

Pupil

A

Opening in the center if the iris that allows light to enter the eye

Size controlled by muscles in the iris

36
Q

Pupillary sphincter

A

Closes pupil

Innervated by parasympathetic axons, composed of smooth muscle

37
Q

Pupillary dilator

A

Dilates pupil, composed of smooth muscle Innervated by sympathetic axons

38
Q

Ciliary muscle

A

Contraction permits lens to thicken for accommodation

Parasympathetic innervation

39
Q

Anterior cavity

A

Cavity between cornea and lens filled with aqueous humor, produced in the posterior chamber

40
Q

Anterior chamber

A

Subdivision of anterior cavity filled with aqueous humor

41
Q

Cornea

A

Transparent connective tissue layer of anterior 1/6 of eye that is the site of light refraction, protects the eye

42
Q

Posterior chamber

A

Subdivision of anterior cavity that produces aqueous humor

43
Q

Optic chiasm

A

Ventral part of diencephalon between optic nerve and optic tract

White matter tract composed of axons of retinal ganglion from both eyes traveling to thalamus and other brainstem nuclei

Some axons from each retina cross in chiasm to enter opposite optic tract

44
Q

Optic tract

A

Between optic chiasm and brainstem nuclei

White matter composed of axons of retinal ganglion cells from both eyes traveling to thalamus

Retinal ganglion goes optic nerve- optic chiasm- optic tract- brainstem nuclei

45
Q

Infundibulum of pituitary

A

Contains hypothalamo-hypophysial portal tract and portal vein that carries hormones to the anterior pituitary

Transmits anti-diuretic hormone and oxytocin to posterior pituitary

46
Q

Occulomotor nerve (CN III)

A

Motor control of medial, superior, inferior rectus muscles and inferior oblique muscle and levator palpebrae superioris muscle

Parasympathetic innervation to pupillary sphincter and ciliary muscle

Connects to midbrain

47
Q

Trochlear nerve (CN IV)

A

Motor control of superior oblique muscles

Connects to midbrain

48
Q

Abducens nerve (CN VI)

A

Middle cranial fossa and orbit

Motor control of lateral rectus muscle

Connects to pons

Anatomy Lab Module 1 (8 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions