NSCI 225 Exam 2 | UPDATED Questions with 100% Verified Answers
Question:
What is retinotopic mapping?
Answer:
point to point mapping of external world onto retina, lateral geniculate nucleus, V1
Question:
what part of the visual field takes up the largest amount of
space in the cortex?
Answer:
the fovea
Question:
what determines where blindness occurs in the visual field?
Answer:
the locations of lesions in the striate cortex
Question:
what is cortical magnification?
Answer:
More neurons in cortex to process information from fovea compared with information
from peripheral retina
Question:
what is a location column?
Answer:
perpendicular to the surface of the cortex, so that all of the neurons within a location
column have their receptive fields at the same location on the retina
Question:
what is an orientation column?
Answer:
,column containing cells that respond best to a particular orientation
Question:
what is an ocular dominance column?
Answer:
it is a region of cortex with greater synaptic input from one eye.
Question:
what is a hypercolumn?
Answer:
2 sets of columns, each covering every possible orientation (0-180 degrees) w 1 set
preferring input from the left eye and 1 set preferring input from the right eye
Question:
what is the difference between a location column and a
hypercolumn?
Answer:
nothing, they are the same thing!
Question:
orientation column + ocular dominance column = ________
Answer:
hypercolumn
Question:
what is a grating?
Answer:
a stripe pattern that sensory researchers often use to determine whether feature
detectors exist in the human visual system
Question:
what is selective adaptation?
Answer:
, when neurons adapt after extended exposure and the firing rate decreases and the
neuron fires less when the stimulus is repeated afterwards
Question:
what different properties can grating vary in?
Answer:
orientation, contrast, transitions between columns, and spatial frequency
Question:
when vertical neurons become less sensitive to vertical lines
following adaptation, the threshold _________
Answer:
increases
Question:
grating adaptation only occurs if....
Answer:
the adapting grating has the same orientation as the test grating
Question:
where does grating adaptation occur?
Answer:
in the primary visual cortex
Question:
where are there binocular neurons?
Answer:
the primary visual cortex
Question:
what is interocular transfer?
Answer:
The transfer of an effect (such as adaptation) from one eye to another
Question:
What is retinotopic mapping?
Answer:
point to point mapping of external world onto retina, lateral geniculate nucleus, V1
Question:
what part of the visual field takes up the largest amount of
space in the cortex?
Answer:
the fovea
Question:
what determines where blindness occurs in the visual field?
Answer:
the locations of lesions in the striate cortex
Question:
what is cortical magnification?
Answer:
More neurons in cortex to process information from fovea compared with information
from peripheral retina
Question:
what is a location column?
Answer:
perpendicular to the surface of the cortex, so that all of the neurons within a location
column have their receptive fields at the same location on the retina
Question:
what is an orientation column?
Answer:
,column containing cells that respond best to a particular orientation
Question:
what is an ocular dominance column?
Answer:
it is a region of cortex with greater synaptic input from one eye.
Question:
what is a hypercolumn?
Answer:
2 sets of columns, each covering every possible orientation (0-180 degrees) w 1 set
preferring input from the left eye and 1 set preferring input from the right eye
Question:
what is the difference between a location column and a
hypercolumn?
Answer:
nothing, they are the same thing!
Question:
orientation column + ocular dominance column = ________
Answer:
hypercolumn
Question:
what is a grating?
Answer:
a stripe pattern that sensory researchers often use to determine whether feature
detectors exist in the human visual system
Question:
what is selective adaptation?
Answer:
, when neurons adapt after extended exposure and the firing rate decreases and the
neuron fires less when the stimulus is repeated afterwards
Question:
what different properties can grating vary in?
Answer:
orientation, contrast, transitions between columns, and spatial frequency
Question:
when vertical neurons become less sensitive to vertical lines
following adaptation, the threshold _________
Answer:
increases
Question:
grating adaptation only occurs if....
Answer:
the adapting grating has the same orientation as the test grating
Question:
where does grating adaptation occur?
Answer:
in the primary visual cortex
Question:
where are there binocular neurons?
Answer:
the primary visual cortex
Question:
what is interocular transfer?
Answer:
The transfer of an effect (such as adaptation) from one eye to another
