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Study sets matching "visual system"

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Study sets matching "visual system"

117 terms
Visual System
What is the wavelength of visible light?
What are the 4 variables that the visu…
Illuminance vs Luminance
Define reflectance:
390nm → 700nm... (violet) → (far red)
1) Intensity... 2) Wavelength... 3) Space... 4) Time
Illuminance = Quantification of light from light source (lu…
A property of a material that dictates the proportion of refl…
What is the wavelength of visible light?
390nm → 700nm... (violet) → (far red)
What are the 4 variables that the visu…
1) Intensity... 2) Wavelength... 3) Space... 4) Time
75 terms
Visual System
inverted and reversed
fovea
macula
optic disk
image forms on the retina are
highest visual acuity
oval region 3x5mm surrounding the fovea with high visual acuity
...
inverted and reversed
image forms on the retina are
fovea
highest visual acuity
130 terms
Visual system
saccade, smooth pursuit, optokinetic
vestibulo-ocular reflex
visual identification
visual location
frontal eye field movements
movement controlled by the vestibular system
operation of the ventral pathway to secondary visual cortices
operation of dorsal pathway to secondary visual cortices
saccade, smooth pursuit, optokinetic
frontal eye field movements
vestibulo-ocular reflex
movement controlled by the vestibular system
64 terms
Visual System
Stimulus
Receptors
Receptors are "mode" specific, meaning…
Eye can recognize a relatively narrow…
any energy capable of exciting a receptor... -Examples:... -Mechani…
specialized nerve cells that transduce/convert energy (to ano…
-The eye is sensitive to certain electromagnetic waves, but t…
400-700 nM
Stimulus
any energy capable of exciting a receptor... -Examples:... -Mechani…
Receptors
specialized nerve cells that transduce/convert energy (to ano…
31 terms
Visual System
The back portion of the interior eyeba…
Clinical term for constricted pupil.
Clinical term for dilated pupil.
Clinical term for drooping of the eyel…
What is the fundus?
What is miosis?
What is mydriasis?
What is ptosis?
The back portion of the interior eyeba…
What is the fundus?
Clinical term for constricted pupil.
What is miosis?
29 terms
Visual System
Diagram of Eye
Light Pathway
Structure of Retina
Fovea
Cornea --> Pupil --> Lens --> Virtreouss Humur--> Fovea
high acuity vision... bipolar + ganglian cells pushed to side... on…
Diagram of Eye
Light Pathway
Cornea --> Pupil --> Lens --> Virtreouss Humur--> Fovea
29 terms
The Visual System
electromagnetic radiation
wavelength
lens
cornea
a fundamental force that can travel arbitrary distances; a ki…
the distance between the two crests of two successive waves a…
the portion of the eye that bends light rays and thus can foc…
the eye's transparent outer coating
electromagnetic radiation
a fundamental force that can travel arbitrary distances; a ki…
wavelength
the distance between the two crests of two successive waves a…
24 terms
Visual System
Sclera
Cornea
Ciliary Body
Iris
Sclera
Cornea
88 terms
Visual System
If you have a patient who may have som…
If performing an EEG what stimulus sho…
What is the cornea?... What does an unev…
What structure covers over regions of…
You could use an EEG (electroencephalogram)
We should use a checker board because the pattern has lots of…
The cornea is the tranparent cover of the front of the eye…
The sclera, or whites of the eye cover over the rest of the e…
If you have a patient who may have som…
You could use an EEG (electroencephalogram)
If performing an EEG what stimulus sho…
We should use a checker board because the pattern has lots of…
Visual System
layers of the eye
2 layers of retina are
where do all the axons leave the eye
optic nerve exit the eye and becomes
sclera... uvea/choroid... retina
neural retina... retinal pigment epithelium
optic disk/ papilla
CN II
layers of the eye
sclera... uvea/choroid... retina
2 layers of retina are
neural retina... retinal pigment epithelium
59 terms
The Visual System
Of all our sensory receptors what are…
D: Cornea... E: Iris... F: Pupil... H: Lens... K:…
How does the eye work like a camera? (…
Which part of eye refracts and focuses…
Sight - our dominant sense.
Review.... Name... D E F H K M N O P Q
It refracts and focuses light rays to form image on retina
ANTERIOR part: refracts and focuses image.... POSTERIOR part: tr…
Of all our sensory receptors what are…
Sight - our dominant sense.
D: Cornea... E: Iris... F: Pupil... H: Lens... K:…
Review.... Name... D E F H K M N O P Q
14 terms
Visual System
Conjunctival Sac
Lacrimal carnucle
Lacrimal gland
Lacrimal punctum
Clear mucus membrane that lines the eyelid
Secretes white oils
Tears
Allows fluid to drain
Conjunctival Sac
Clear mucus membrane that lines the eyelid
Lacrimal carnucle
Secretes white oils
28 terms
Visual System
Optic Nerve
Sclera
Cornea
Choroid
Identify the structure
Identify the structure.
Identify the structure.
Identify the structure.
Optic Nerve
Identify the structure
Sclera
Identify the structure.
85 terms
Visual System
Visual Pathways
Visual Pathways (A - F)
Level of processing (3)
Streams of processing (2)
Retina... Optic N. ... Optic chiasm ... Optic tract... LGN... Optic radiatio…
A. Retina ... B. Retina --> Optic Nerve... C. Optic N. --> Optic Ch…
Low... Intermediate ... High
Dorsal... Ventral
Visual Pathways
Retina... Optic N. ... Optic chiasm ... Optic tract... LGN... Optic radiatio…
Visual Pathways (A - F)
A. Retina ... B. Retina --> Optic Nerve... C. Optic N. --> Optic Ch…
44 terms
Visual System
Vision
Visual Stimulus
Optical Component
Structures of the Optical Component
Major sensation for humans and other dinural animals. It is a…
Sensation is stimulated by light bouncing off of objects. T…
Job is to get the light that is reflected off of objects focu…
Sclera, cornea, pupil, iris, and lens
Vision
Major sensation for humans and other dinural animals. It is a…
Visual Stimulus
Sensation is stimulated by light bouncing off of objects. T…
52 terms
Visual System
Anatomy of the Eye
Retina
Fovea
Retinofugal Projection
Cornea: focuses image on retina... Pupil: regulates light... Lens:…
3 Layers: ... 1. photreceptors... 2. bipolar cells... 3. ganglion cells
The pit or depression in the retina at the center of the eye…
The ganglion cell axons leaving the retina pass through 3 str…
Anatomy of the Eye
Cornea: focuses image on retina... Pupil: regulates light... Lens:…
Retina
3 Layers: ... 1. photreceptors... 2. bipolar cells... 3. ganglion cells
46 terms
Visual System
The Visual System is both an...
Retina
Retina function
Fovea
Optical instrument designed to focus the visual world on a…
The inner lining of the eye which contains photoreceptor cell…
Performs the 1st stage of visual processing ... Stimulation of l…
Small deression in the retina where *visual activity is highe…
The Visual System is both an...
Optical instrument designed to focus the visual world on a…
Retina
The inner lining of the eye which contains photoreceptor cell…
7 terms
Visual System
1. Optic Nerve... 2. Optic Chiasm... 3. Opti…
5. Meyer's Loop (or temporal radiation…
1) Images enter Retina (i.e., Left vis…
Specialized for pattern analysis. ... Pa…
Name structures #1-4
Name structures #5-7
Explain this visual pathway
Explain Geniculostriate Pathway
1. Optic Nerve... 2. Optic Chiasm... 3. Opti…
Name structures #1-4
5. Meyer's Loop (or temporal radiation…
Name structures #5-7
16 terms
Visual System
major structures of the eye
rods vs. cones
organization of the retina
transduction for light waves
cones: most prevalent in central retina; found in the fovea;…
retina: neural tissue and photoreceptive cells located on the…
1) photopigments: protein dye bonded to retinal, a substance…
major structures of the eye
rods vs. cones
cones: most prevalent in central retina; found in the fovea;…
77 terms
Visual System
components of the outer layer of the eye
components of the middle layer of the…
components of the inner layer
lamina cribrosa
fibrous tissue -cornea, conjunctiva, sclera
vascular or uvea-iris, ciliary body, choroid
Neural- retina
pass for the optic nerve, serves for protection of the nerves…
components of the outer layer of the eye
fibrous tissue -cornea, conjunctiva, sclera
components of the middle layer of the…
vascular or uvea-iris, ciliary body, choroid
10 terms
VISUAL SYSTEM
Stimulus
Photic
Receptors
mode
Energy capable of exciting a receptor
Eyes react to this kind of energy
Specialized cells that transduce energy
Receptors are _________ specific
Stimulus
Energy capable of exciting a receptor
Photic
Eyes react to this kind of energy
Visual System
Retina
Retinal Ganglion Cells
Receptive field of a retinal ganglion…
3 Pathways carry info to CNS
Outer layer: photoreceptors... - rods: low light and peripheral…
Spontaneously firing neurons. Receive input from multiple pho…
The region of the retina where the action of light alters the…
1. Optic tract: retinal ganglion fibers -> pretectal area... 2.…
Retina
Outer layer: photoreceptors... - rods: low light and peripheral…
Retinal Ganglion Cells
Spontaneously firing neurons. Receive input from multiple pho…
26 terms
Visual System
Sclera... (White)
Cornea... (Clear)
Choroid
Ciliary Body
Sclera... (White)
Cornea... (Clear)
16 terms
VISUAL SYSTEM
CORNEAL REFLEX SENSORY
CORNEAL REFLEX MOTOR
TOUCHING OF THE CORNEA
PROVIDES SIGHT FOR THE RECOGNITION OF…
CV V
CN VII
CN V
CN II
CORNEAL REFLEX SENSORY
CV V
CORNEAL REFLEX MOTOR
CN VII
118 terms
Visual System
components (tunics) of the outer layer…
components of the middle layer of the…
components of the inner layer
lamina cribrosa
fibrous connective tissue -cornea, conjunctiva, sclera (corne…
vascular or uvea-iris, ciliary body, choroid
(Vitreal) Neural- retina and RPE
pass for the optic nerve, serves for protection of the nerves…
components (tunics) of the outer layer…
fibrous connective tissue -cornea, conjunctiva, sclera (corne…
components of the middle layer of the…
vascular or uvea-iris, ciliary body, choroid
44 terms
Visual System
Cornea
Iris
Sphincter Pupillae
Dilator Pupillae
B... Non vascular, transparent coat, covers iris, curved so help…
Suspended between cornea and lens; consists of radial and cir…
Circular Smooth muscle innervated by PARASYMPATHETIC fibers,…
Radial smooth muscle innervated by SYMPATHETIC FIBERS which D…
Cornea
B... Non vascular, transparent coat, covers iris, curved so help…
Iris
Suspended between cornea and lens; consists of radial and cir…
24 terms
Visual System
Cornea
Pupil
Iris
Lens
Cornea
Pupil
31 terms
Visual System
Cornea
Iris
Pupillary dilation - pathway
Pupillary response to light
Non-vascular... Transparent... Covers iris... Curved to help focus lig…
-suspended b/t the cornea and the lens; consists of radial an…
-receptors in retina sense dim light... -preganglionic neurons w…
-neurons in the Edinger-Westphal nucleus sense bright light... -…
Cornea
Non-vascular... Transparent... Covers iris... Curved to help focus lig…
Iris
-suspended b/t the cornea and the lens; consists of radial an…
51 terms
Visual System
Pupil
Iris
Sclera
Retina
allows light to enter and reach retina
color portion; 2 muscles constrict and dilate pupil
white, forms tough wall of eye
forms images
Pupil
allows light to enter and reach retina
Iris
color portion; 2 muscles constrict and dilate pupil
11 terms
Visual System
Pupil
Iris
Retina
Optic Nerve
outmost part of eye (1st), allows light to pass through into…
2nd part of the eye (moving inward), colored part of the eye,…
3rd part (moving inward), layered structure of cells, respons…
4th part (moving inward), connection between the eye and the…
Pupil
outmost part of eye (1st), allows light to pass through into…
Iris
2nd part of the eye (moving inward), colored part of the eye,…
8 terms
Visual System
Flow of aqueous humor
Glaucoma
Accommodation Reflex
Photoreceptors
Posterior chamber --> pupillary aperture --> anterior chamber…
increased intraocular pressure caused by failure of resorptio…
Contraction of ciliary muscles which bulges the lens to focus…
absorb photons, info then processed through retinal layers be…
Flow of aqueous humor
Posterior chamber --> pupillary aperture --> anterior chamber…
Glaucoma
increased intraocular pressure caused by failure of resorptio…
36 terms
Visual System
Pigment Epithelium. ... Outer Limiting Me…
Rods and Cones
sensitive to dim light. ... no color. ... Lo…
Sensitive to bright light, see color.…
Give the layers of the retina in order
2 types of photoreceptors
Rods (function and location within retina)
Cones (function, location, 3 wavelengths and what they sense)
Pigment Epithelium. ... Outer Limiting Me…
Give the layers of the retina in order
Rods and Cones
2 types of photoreceptors
34 terms
Visual System
cornea
iris
pupil
Crystalline lens
Located into the anterior cavity, light enters and is bent by…
Located in the anterior cavity, colorful part of the eye that…
Hole inside iris where light comes through
Anterior cavity, stuck inside of the eye and focuses the ligh…
cornea
Located into the anterior cavity, light enters and is bent by…
iris
Located in the anterior cavity, colorful part of the eye that…
30 terms
Visual System
Visual Pathway
Cornea
Fibrous tunic
Sclara
Eyeball- optic nerve- optic chasm- optic tract- lateral gesti…
Clear membrane at the front of the globe covering the iris, p…
cornea anterior 1/6 and sclara posterior 5/6.
outer most layer made up of connective tissue what white repr…
Visual Pathway
Eyeball- optic nerve- optic chasm- optic tract- lateral gesti…
Cornea
Clear membrane at the front of the globe covering the iris, p…
83 terms
visual system
visual light
partial view point
wave phenomenon
UV-B rays
electromagnetic energy- what our eyes are geared to see (meas…
light consists of photon particles that travel at a constant…
travels in the way that a wave travels - measure wave length…
sunburn and skin cancer
visual light
electromagnetic energy- what our eyes are geared to see (meas…
partial view point
light consists of photon particles that travel at a constant…
37 terms
Visual system
Cornea
Aqueous humor
Glaucoma
Lens
Transparent tissue
Produced y the vascular part of the ciliary body, replaced ab…
Poor drainage of the aqueous humor. If you have build up of a…
Transparent tissue
Cornea
Transparent tissue
Aqueous humor
Produced y the vascular part of the ciliary body, replaced ab…
76 terms
Visual System
Sclera
Cornea
Choroid
What composes the middle layer of the…
tough, outermost layer of the eye
transparent external surface, major refractive component, con…
highly vascularized between retina and sclera... Retinal pigmen…
the choroid, iris, ciliary body... collectively called the uvea
Sclera
tough, outermost layer of the eye
Cornea
transparent external surface, major refractive component, con…
22 terms
Visual System
Cornea
Iris
Pupil
Lens
- Light passage into the brain... - Clear, protective film cover…
Colorful part of eye that helps diminish the amount of light…
- Little hold inside iris on eyeball... - Where the light comes…
Focuses light into your retina
Cornea
- Light passage into the brain... - Clear, protective film cover…
Iris
Colorful part of eye that helps diminish the amount of light…
41 terms
The Visual System
Cornea
the main site of refraction
Iris
regulates the amount of light entering…
the main site of refraction
Cornea
regulates the amount of light entering the eye
Iris
Cornea
the main site of refraction
the main site of refraction
Cornea
77 terms
Visual System
Photosensitive ganglion (aka W cells)…
What do photosensitive ganglion respon…
Photosensitive ganglion cells project…
The lens system of the projects projec…
ganglion cell layer of retina
light independent of input from bipolar cells
optic tract, optic chiasma, optic nerve, brachium of superior…
inverted and reversed
Photosensitive ganglion (aka W cells)…
ganglion cell layer of retina
What do photosensitive ganglion respon…
light independent of input from bipolar cells
37 terms
The Visual System
eye... accessory structures... optic nerve (…
eyebrow, eyelids, eyelashes, lacrimal…
thalamus, occipital lobe
Fibrous... Vascular... Retina
components of the visual system
accessory structures
sensory information travels along optic nerve to ____ then to…
3 Coats or Tunics of eye
eye... accessory structures... optic nerve (…
components of the visual system
eyebrow, eyelids, eyelashes, lacrimal…
accessory structures
35 terms
Visual System
The back portion of the interior eyeba…
Clinical term for constricted pupil.
Clinical term for dilated pupil.
Clinical term for drooping of the eyel…
What is the fundus?
What is miosis?
What is mydriasis?
What is ptosis?
The back portion of the interior eyeba…
What is the fundus?
Clinical term for constricted pupil.
What is miosis?
117 terms
Visual System
What is the wavelength of visible light?
What are the 4 variables that the visu…
Illuminance vs Luminance
Define reflectance:
390nm → 700nm... (violet) → (far red)
1) Intensity... 2) Wavelength... 3) Space... 4) Time
Illuminance = Quantification of light from light source (lu…
A property of a material that dictates the proportion of refl…
What is the wavelength of visible light?
390nm → 700nm... (violet) → (far red)
What are the 4 variables that the visu…
1) Intensity... 2) Wavelength... 3) Space... 4) Time
10 terms
The Visual System
Light
retina
visual cortex
feature detectors
a form of electromagnetic energy that can be described in ter…
eye's film ... light sensitive surface that records electromagn…
located at occipital lobe... part of the cerebral cortex involve…
neurons in the brain's visual system that respond to particul…
Light
a form of electromagnetic energy that can be described in ter…
retina
eye's film ... light sensitive surface that records electromagn…
31 terms
Visual System
The back portion of the interior eyeba…
Clinical term for constricted pupil.
Clinical term for dilated pupil.
Clinical term for drooping of the eyel…
What is the fundus?
What is miosis?
What is mydriasis?
What is ptosis?
The back portion of the interior eyeba…
What is the fundus?
Clinical term for constricted pupil.
What is miosis?
The Visual System
Prosopagnosia
Photoreceptors
Ratio of photoreceptors to RGC
Pathways of RGC from retina
- An inability to recognize faces.... - The result of damage to…
RODS... - Sensitive to low light... - Night vision... CONES... - Sens…
100:1
- Retinogeniculate pathway (90%)... - Pathway to superior collic…
Prosopagnosia
- An inability to recognize faces.... - The result of damage to…
Photoreceptors
RODS... - Sensitive to low light... - Night vision... CONES... - Sens…
31 terms
Visual System
The back portion of the interior eyeba…
Clinical term for constricted pupil.
Clinical term for dilated pupil.
Clinical term for drooping of the eyel…
What is the fundus?
What is miosis?
What is mydriasis?
What is ptosis?
The back portion of the interior eyeba…
What is the fundus?
Clinical term for constricted pupil.
What is miosis?
55 terms
Visual System
As light passes through the lens, it f…
Information from _____ visual space is…
______ part of visual space projects t…
_______ ________ point for each eye fa…
RETINA... inverted ... reversed
Upper... Lower
Right
central fixation
As light passes through the lens, it f…
RETINA... inverted ... reversed
Information from _____ visual space is…
Upper... Lower
20 terms
Visual System
Lateral Rectus
Medial Rectus
Superior Rectus
Inferior Rectus
CN VI (abducens)... pulls eye laterally (ABD)
CN III (occulomotor)... pulls eye medially
CN III (occulomotor)... pulls eye up
CN III (occulomotor)... pulls eye down
Lateral Rectus
CN VI (abducens)... pulls eye laterally (ABD)
Medial Rectus
CN III (occulomotor)... pulls eye medially
45 terms
Visual System
II. Optic Nerve
Thalamic nuclei (vision)
Special sensory nuclei involved in vis…
What does the primary visual cortex do?
Function: Vision... Origin: Above mesencephalon (crosses at opt…
- Some nuclei are dedicated to special sensory fuctions... - Oth…
Lateral geniculate bodies... - Receive fibers from retina and pr…
Receives most direct signal from eyes
II. Optic Nerve
Function: Vision... Origin: Above mesencephalon (crosses at opt…
Thalamic nuclei (vision)
- Some nuclei are dedicated to special sensory fuctions... - Oth…
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