Visual Information Processing Flashcards
(30 cards)
what is memory coordinated by
prefrontal crotex
what are the 2 streams categorzied by the visual info
ventral stream: what stream: temporal stream
dorsal stream: where stream: parietal stream
what is the stream that processing info for object identificaiton and recognition
ventral stream
where does the ventral stream receive strong input from
parvocellular pathway
which stream processing info for motion perception, localization and action
dorsal stream
where does the dorsal stream receive strong input from
magnocelluar pathway
does info flow only in one direction? ex. from visual cortex to higher brain structures)
no
theres feed forward distr of visual info but theres also feedback from higher cortical areas to lower areas (top-down prcoessing)
the specialization of different cortical areas to diff aspects of visual information is known as…
cortical modularity
what are the techniques that cortical modularity can be studied by
positron emission tomography (PET)
functional magnetic resonance imaging (fMRI)
transcranial magnetic stimulation (TMS)
what is the removal of a small brain tissue from a specific location to see if it compromises the perception of visual aspect
brain ablation
what is the binding problem
the brain has to put all this processed info together so we perceive the scene
waht are the 2 methods used to prove that there is a rel’n btwn physiology and perception
selective adaptation
selective rearing
we have seen____ when we showed that adaptation to gratings causes a reduction in our sensitivity
selective adaptation
-this exmaple proves that physio-perception rel’n does exist and that physio and feature detectors can explain perception
what is selective rearing
studies that were done in animals that were reared in a control environement
-evironment can consist of only horiz or vert lines
what is the way that the neurons changed according to the environment that the kittens were reared called
neural plasticity or experience-dependent plascitiy
up the _____ the feature detectors were detectors for perceiving horiz and vert lines, lines that move toward one direction and not other
primary visual cortex
what is face fusiform area
found in the 90s, an area in the temporal lobe that responded strongly to faces
part of the IT cortex that Gross studied
how do you recognize a face (3 steps)
- you need to recognize the object as a face
- you need to detect certain features on the face
- you need to remember that this face is osmeboyd you know for example
there is a brain area that processes the face as a whole image and then separate brain that process specific features of the face
FFA is first-not prone to orientation-processes the img in a holistic way
occipital face area (OFA) and superior temporal sulcus (STS) are more specific face features
what is the the medical condition wehre you cannot recognize faces “face blind
prosopagnosia
- can resutl from damage to one of the areas responsbile for face recog (FFA, OFA, STS)
- aquired but can be congenital
what did underleider and mishkin (1982) use to study different parts of the brain
double dissociation: when there are 2 subjects taht perform 2 tasks
ex recognition task and localization task
ablanation in diff locations in the brain
what did ablation in the temporal cortex compromise
what did ablation of the parietl cortex compromise
temporal: discrimination tasks
parietal: localiaztion task
who were the first to talk about the 2 stream hyotheseis
ungerleider and mishkin
milner and goodale suggested that the dorsal pathway is not only processing “where’ info but proceses also…
how info
dorsal pathway is WHERE AND HOW
