Perception Flashcards
what does the dorsal visual stream process
where somthing is, motion
what does the ventral stream process
what is it? objects
what does the ventral visual stream process through
V2-V3-V4-IT, what, objects
As information progresses through the visual system, visual receptive fields do what
Become larger and respond to more complex information.
what does the dorsal visual processing stream proceeds through
V2-V3-MT-MST
In the lateral geniculate nucleus, most neurons are receptive to what
points of light
Neurons in the primary visual cortex are receptive to what
line orientations
what is the order of visual projections
Retina - lateral geniculate nucleus - primary visual cortex.
As you pass through the visual system what happens to receptive fields
receptive fields get larger as you pass through the visual system
What does the dorsal visual stream do
where is it? movement/ motion. Does this through V2,V3,MT,MST
what does the ventral visual stream process and how dose it do this
what is it. Does this through V2, V3,V4,IT-FFA
What is V1
Primary visual cortex, first area to receive information from retina
What is V2
Processes more complex visual stimuli
what are rods sensitive to
low light black/ white
what are cones sensitive to
higher levels of light, color
What is the visual perception pathway
stimulus- receptors- pathway to brain- processing- LGN- primary visual cortex
what is sensation
detection of stimuli from outside world
what is the general pathway
chain of sensory neurons- CNS- brain
what are the properties of V1
Retinotopic- certain areas of V1 correspond with retina, shows foveal magnification
fovea
dense receptors (allows you to see clearly)
retina
light receptors are found
optic
nerve: Brain- eye (blind spot), no receptors
Foveal Trichromacy
3 wavelength types, helpful for colors both eyes use both sides (red, green, blue)
what is the receptive field
region that can get special input and respond
cilia
hair like receptors, sound waves move them, causes neurons to fire and release neurotransmitters
cochlea
fluid filled tube, sound enters here
what does the auditory nerve do?
takes info into the brain
In what way is the auditory pathway procsesed (conterlateral, lateral, bilateral)
bilateral, info from both ears is processed
What does retinotopic mean
spatial arrangement of where visual stimuli are processed in the visual system, in the retina different regions are sensitive to different parts of visual field. (map of retna)
Describe the auditory pathway
sound/stimuls- receptors (cilia)- cochlea- auditory cortex (brain receives info)
what is the auditory cortex and what does it do
Tonotopic and specialized for sound frequencies
What happens when there is damage to the visual pathway
blindness, can see objects/ movement, but cannot recognize them, impaired depth perception and coordination
what happens when there is damage to the auditory pathway
hearing loss, impaired balance, difficulty understanding language/ speech
what does tonotopic mean
relating to the spatial arrangement of sound frequencies in the brain
Who is Gram Young
he had damage to the ventral stream in the occipital lobe.
what does the fovea allow you to do
see crisp colors
are visual projections contralateral
yes
what is trichromacy
the ability to see red, blue, and green
