Our senses give us a perfectly accurate snapshot of everything occurring in the external world, with no distortions or omissions. - ANSWERSFalse
Humans can see all possible light wavelengths. - ANSWERSFalse
The retina is located at which part of the eye? - ANSWERSThe very back (closest to you...
Behavioral Neuroscience Exam 2
Questions & Answers
Our senses give us a perfectly accurate snapshot of everything occurring in the external
world, with no distortions or omissions. - ANSWERSFalse
Humans can see all possible light wavelengths. - ANSWERSFalse
The retina is located at which part of the eye? - ANSWERSThe very back (closest to
your thalamus)
Transduction means: - ANSWERSconverting energy out in the world to a language that
neurons speak
Which of these properties are true of cones? - ANSWERSThey are primarily located in
the center of the retina
They are responsible for color vision
They are responsible for clarity
Which of these cells fires an action potential that is sent directly down the optic nerve?
(by direct, I mean without synapsing on another neuron). - ANSWERSretinal ganglion
cell
Which of the following is most accurate? - ANSWERSVision does not perfectly capture
what is out in the world. And, if some information is distorted (or neglected or
emphasized), that can even happen in the eye itself, before the information gets sent to
the brain.
Which of the following are true about the direction of information flow in the visual
system? - ANSWERSThe optic chiasm is where some information crosses over to the
contralateral hemisphere (while some other information doesnt cross over)
Information in the left visual field ends up in the right hemisphere
Each eye gets information from both halves of the visual field
Select the items about receptive fields of neurons in the visual system that are correct. -
ANSWERSThe retinal ganglion cells with smaller receptive fields are responsible for
things like reading very fine print.
Retinal ganglion cells that synapse on more photoreceptors have larger receptive fields
, The receptive fields of retinal ganglion cells in the fovea are smaller, receptive fields of
retinal ganglion cells in the periphery are larger
What is the primary (and first) destination of the axons of most of the retinal ganglion
cells? (E.g. where will they synapse on the next neurons in the pathway). -
ANSWERSThe lateral geniculate nucleus of the thalamus
There is only one pathway for visual information in the brain. - ANSWERSFalse
Why might people who are blind still be able to use some visual information to guide
their behavior? - ANSWERSThey might have damage to parts of the pathway
associated with conscious awareness of visual information, but visual information might
still be getting through to other pathways they are not aware of.
A neuron that is orientation-selective would: - ANSWERSFire the most when a specific
angle is visible, and fire less (or not at all) in response to different angles
Which of these is more consistent with an orientation-selective neuron in V1 (primary
visual cortex), as opposed to somewhere else in the brain? - ANSWERSIt fires when it
sees a specific angle only in the portion of the visual field it is monitoring. (so maybe
only on Chuck Close's nose, but not his ear)
Which of these is more accurate about the organization of V1 (primary visual cortex)? -
ANSWERSIt has all these little processing units responsible for doing different things,
like responding to different orientations, textures, etc. All the neurons responsible for
monitoring one specific area of space (like part of chuck's nose) live together in the
same part of V1, and inside the part where they live, there are some neurons that detect
one specific orientation (like "/") and there are other neurons that detect other specific
orientations (like "\"). Then, the neurons that are responsible for monitoring other parts
of space (like part of Chuck Close's ear) live in a different part of V1.
Cell A responds to only one exact angle at one exact part of the visual field. Cell B
responds to the same angle as Cell A, but also responds to a few similar angles as well,
even at slightly different locations. Cell A is a ______ and Cell B is a ______. -
ANSWERSCell A: simple cell
Cell B: complex cell
All neurons in V1 receive inputs from both the left eye and the right eye, in equal
proportion (e.g. 50/50). - ANSWERSFalse
All the visual information coming in from your retinas is sent to all the same areas of
your brain for processing. - ANSWERSFalse
You hear someone say: "The brain like to use hierarchical processing. Frequently, it
figures out simple things first, and those simple things get combined into more
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