Extrastriate cortex Flashcards
The dorsal-dorsal stream processes ____ information. Damage in this area results in optic taxis which is the inability to point to or reach for a visual target. In comparison, the ventral-dorsal stream, which includes the _____ appears to play a role in space perception as well as action organization
action; MT
V4 is responsible for _____ perception. Cells in the IT cortex respond to complex forms including faces. Both V4 and IT are part of the ____ processing
color; ventral
Area MT/V5 is a component of the _____ processing stream and is well suited for the encoding of ______
dorsal; motion
________result from the adaptation of direction specific motion detectors
MAEs (motion after effect)
Cells in ____ respond best to sophisticated, albeit basic, shapes that could serve as building blocks to construct even more complex forms.
IT
The area of monkey cortex that is called IT is probably equivalent to the _____ in humans
lateral occipital complex; responding well to objects
The ____ responds well to faces but not to other objects. The _____ responds well to objects but not to faces
fusiform face area; parahippocampal
What is top down attention
the observer decides what to pay attention to.
what is bottom up attention
attention caused by an external stimulus
what is serial processing
where we direct our spotlight of attention on each object of interest to see if its available.
what is change blindness
Where we can’t see the difference between two images.
Cells in striate cortex don not demonstrate __ ____ attention
top down
Extrastriate lesions can lead to visual agnosia which refers to:
inability to recognize objects
What does akinetopsia refer to
defect in the perception of motion
What does achromatopsia refer to
pt has normal complement of cones but is unable to distinguish hues secondary to an extra striate lesion.
what is simultagnosia
pt may not be able to perceive more than one object at a time.
What is balint’s syndrome
a condition in which there is typically bilateral damage to the parietal lobes.
what is synesthesia
cortical modules appear to be abnormally linked to each other such that stimulation of one sense results in the activation of another.
V4 and IT are part of the ____ processing stream
ventral
MT is part of the _____ processing stream
dorsal
V2 encodes subjective contour which is predominantly ____ pathway
magno
Thick stripes refer to _____ pathway, interstripes/pale stripes refer to ______ pathway
magno; parvo
V2 maintains orientation, direction, disparity, subjective contour, and ____ motion
pattern
V2 goes to V4 which encodes color information, orientation, and ___ ____ patterns
non cartesian
