Chapter 6
Dorsal Stream
patial location...
-deals with pareital lobe of the brain...n its responsible for like seeing...hearing...space
involving actions
-if the parietal lobe gets damaged...it can cause us to not remember where we put
sumthing or how we control our limb...including eyes..
-the dorsal stream has neurons that r in charge of controlling how our eyes move n how
we reach for things...our hand movements..
-main idea of this was that the dorsal stream guides the actions that we do
so instead of referring it to "what" and "where" n object is....its more recommended to
say it measures "what" the object is and "how" it moves or performs actions
if the dorsal stream has to doo with reaching for an object, then it also deals with
where the object is located...since u r reaching for it
n like the size oof it..physical characterisitcs
dorsal stream--perception of movement
knoewing whats of objects isnt enough
-u need to noe the direction of movement also
there have been stuides on animals which suggest that the VC is surrounded by
ExtrastratiaCortex which contains neurons responsibe for movement
-similar experiments in humans show that damage to this regiion of brain cud result in
this disorder cant remember... actotopia or sth which is like inability to identify moving
objects..
-why is perception of movement necessary cuz it can help us percieve 3d objects .
-whar johanes did was related to all that black dressed ppl with lights attached to
them.. it was found out that u cud see the shape of humans in it and wat actions they
are doing
-and a regiion is activated Sullkuss whenever people view the video of those ppl dancing
around
thats all
n that region even became activated if ppl imagined the movements VISUAL PERCEPTION OF OBJECTS
so boundaries afterall r not that important
✗ gestalt psychology developed by a group of psychogists who beleived that
whatever we percieve , we see it in terms of elements but we make it into full forms
✗ even if we see elements of an object, we will percieve its full form
✗ n this quality was very important bcuz it showed that the way our visual system
works is very unique bcuz we can recognice objects even if they are not fully drawn or
fuzzy
✗ there r 5 laws associated with the gestalt psychology
✗ proximity law says that if objects r close to each other they look like they r from
same group....they look the same
MODELS OF PATTERN PERCEPTION
In order to form a pattern, objects in different sizez, and sequence or simultaneously
can come into existance to form a patterm
-templates by definition is like a basis to which sumthing more is made.. like a pattern
- in our visual system the concept of template is reversed..its like it searches through
the collection and matches the correct template to the stimulus..hoever some say this
might not happen since then brain will have to store way too much templates
protoype, which are just patterns except they are more flexible ...
the reason this system works better is bcuz the way our visual system works, it already
has patterns that represesnt the object we r looking at...so wen we do look at that
certain object,
our visual system just recognizes it
n find the best prototype that matches to wat we r looking at
distinctive features..
- like set of p
More
Less
