Transcript The Visual System: Quiz Game

The Visual System
Neuro Quiz
Identify the correct question
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 Michael McKeough 2008
Visual System
Neuro Quiz
Receptors
Central
Pathway
Physiology
Misc.
Pathology
100
100
100
100
100
200
200
200
200
200
300
300
300
300
300
400
400
400
400
400
500
500
500
500
500
Click category value to begin.
Receptors
100
This is the most anterior structure
of the globe (eye ball).
It provides protection to the
anterior chamber.
It becomes drier and less flexible
with age.
What is the cornea?
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Receptors
200
This aperture reflexively regulates
the level of illumination in the
posterior chamber.
Under normal circumstances it is
reactive to light.
What is the pupil?
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Receptors
300
These receptors are sensitive to
black and white.
They are also sensitive to lines,
edges and motion.
They are the most numerous
receptors in the retina, particularly
toward the periphery.
What are rods?
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Receptors
400
This structure produces the “blind
spot” in the visual field.
It covers the ganglion cells as they
exit the globe.
What is the optic disk?
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Receptors
500
This is the “preferred” region of the
retina.
It contains a 1:1 relationship
between cones and bipolar cells.
What is the fovea centralis?
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Central Pathway
100
These cells form the first-order
neurons in the central visual
pathway.
They innervate both rods and
cones.
What are bipolar cells?
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Central Pathway
200
This pathway projects from the optic
chiasm to the thalamus.
It consists of fibers from the
ipsilateral temporal hemiretina and
contralateral nasal hemiretina.
What is the optic tract?
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Central Pathway
300
This nucleus is the thalamic relay
center for the central visual
pathway.
It contains the cell bodies of thirdorder neurons.
What is the lateral geniculate nucleus?
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Central Pathway
400
These fibers consist of third-order
neurons projecting from the
thalamus to the primary visual
cortex.
They arch around the lateral ventricle
to reach their destination.
What are the optic radiation fibers?
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Central Pathway
500
This sulcus contains the primary
visual cortex within the occipital
lobe.
It is visible on a midsaggital section
of the brain.
Area 17 of Brodmann is located on
both its superior and inferior banks.
What is the calcarine sulcus?
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Physiology
100
This structure is located in the
anterior chamber and gives the eye
its color.
What is the iris?
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Physiology
200
These are the three color
sensitivities on which color vision is
based.
What are red, blue, and green?
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Physiology
300
The receptor potential in rods is
due to the bleaching of this
substance.
What is rhodopsin?
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Physiology
400
This structure, in the human retina,
absorbs light after it passes by the
receptors.
What is the choroid?
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Physiology
500
The eyes deviate in this direction
when the speaker is visually
remembering images.
What is up and to the left?
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Miscellaneous
100
These extraocular muscles are
named for the direction in which
they move the eye.
There are 4 pairs of these muscles
in each eye.
What are the rectus muscles?
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Miscellaneous
200
This type of eye movement is used
to reposition the globe from one
visual target to another.
These movements occur so quickly
as to be imperceptible.
What is saccadic movement?
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Miscellaneous
300
This clear fluid fills the posterior
chamber.
What is vitreous humor?
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Miscellaneous
400
This portion of the retina receives
images from the lateral portion of
the visual field.
Fibers originating here cross the
midline in the optic chiasm.
What is the nasal hemiretina?
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Miscellaneous
500
This portion of ambient light is
what gives an object its color.
What is the frequency of light waves
reflected by the visual target?
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Pathology
100
A lesion of this structure produces
monocular blindness.
What is the optic nerve?
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Pathology
200
This clinical test is commonly used
to examine the oculomotor system
(extraocular muscles).
What are the cardinal planes of gaze?
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Pathology
300
This type of abnormal, involuntary
eye movement consists of slow and
fast components.
It is associated with damage to the
vestibular and cerebellar systems.
What is nystagmus?
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Pathology
400
Age-related deficits in visual acuity
(presbyopia) are caused by this
impairment.
It is caused by a progressive loss of
fluid.
It usually results in farsightedness
(hyperopia).
What is impaired lens
accommodation?
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Pathology
500
This is the most common visual
impairment (field cut) associated
with stroke.
It is caused by a lesion affecting the
central visual pathway posterior to
the optic chiasm.
What is hemianopsia?
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