Encoding in the retina Encoding Ganglion cells have centersurround receptive fields Rods send information to magnocellular pathway Cones send information to parvocellular pathway Lateral Geniculate Nucleus ID: 776334
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Slide1
BIOL3833
Week 14: Neurobiology of Vision Part 2
Slide2Slide3Slide4Encoding in the retina
Slide5Encoding: Ganglion cells have center/surround receptive fields
Slide6Rods send information to
magnocellular
pathway
Cones send information to
parvocellular
pathway
Slide7Slide8Slide9Lateral Geniculate Nucleus
Meissirel
C et al. PNAS 1997;94:5900-5905
©1997 by National Academy of Sciences
Slide10Slide11Primary Visual Cortex
Hubel Wiesel LGN neuronsSimple Cell (V1)
Slide12Creating simple cells
Slide13Slide14Hypercolumns
in Primary Visual Cortex (V1)
Slide15Cortical vision processing: Two “streams”
Slide16Two different sources of motion illusion
Superior
colliculus
Visual cortex
Slide17Slide18What does the superior
colliculus
do?
Slide19+
Slide20BLUE
+
Slide21Slide22+
Slide23Slide24Slide25Slide26Fatiguing neurons in MT (V5)
http://michaelbach.de/ot/mot-adaptSpiral/index.html
http://www.youtube.com/watch?v=tVgOLWVYytM
Slide27Split-depth illusions
Reveal the role of competition between networks of motion-sensitive neurons
Slide28Top-down processing
Our experience and expectations change what we perceive
Slide29Slide30Slide31Bistable perceptions
Our experience and expectations change what we perceive
And reveal competing networks of neurons
Slide32Slide33Slide34