Visual system part 2 Flashcards
ant; post in primary visual cortex
Peripheral vision; Central vision
expanded cortical representation
Central vision
goes through macula
and has expanded cortical representation
Central vision
most area 17 neurons have a preference for input
from one eye)(monocular)
Axons from LGN course to the primary visual cortex (area 17) and synapse on
layer IV neurons.
monocular; binocular
Layer IV neurons; Layer II/III, V and VI neurons
simple and complex cell
area 17
orientation of a line.
simple cell
may be direction sensitive or respond best to a corner, cross or x.
Complex cells
Cell column that prefer the same line orientation
Orientation Column
Cell clusters that respond to color
Color-Sensitive Region
wavelength sensitive
Color-Sensitive Region
Cell column that respond to input from either the R or L eye OR in the case of binocular cell, have a strong preference for the R or L eye
Ø Ocular Dominance Column
Hypercolumn
refer to a set of orientation and ocular dominance columns that receive input from a given point in the visual field
Primary visual cortex
projects to extrastriate visual areas where neurons require complex stimuli for maximal activation
Primary visual cortex respond to
fundamental aspect of a visual stimulus (orientation, contrast, motion, color, eye of origin)
Dorsal (“M”) Stream
where
perception of motion
posterior parietal association cortex
(from Dorsal (“M”) Stream)
visual information travels to the inferior temporal association cortex
Ventral (“P”) Stream
Ventral (“P”) Stream
what
size, shape, color, orientation
inferior temporal association cortex
(Ventral (“P”) Stream)
inferior temporal cortex
Lesion to V4
