adaptation properties of macaque mt neurons adam kohn matt a. smith najib majaj j. anthony movshon
Post on 19-Dec-2015
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![Page 1: Adaptation Properties of Macaque MT Neurons Adam Kohn Matt A. Smith Najib Majaj J. Anthony Movshon](https://reader035.vdocuments.site/reader035/viewer/2022062714/56649d395503460f94a13f7e/html5/thumbnails/1.jpg)
Adaptation Properties of Macaque
MT Neurons
Adam Kohn
Matt A. Smith
Najib Majaj
J. Anthony Movshon
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Questions
• Change in direction tuning– Direction specificity
• Transfer of adaptation in RF– Spatial specificity
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Dragoi et al. (2000)
Specificity of V1 Adaptation Effects
•Spatial Frequency-Movshon and Lennie (1978)-Saul and Cynader (1989)
•Temporal Frequency- Saul and Cynader (1989)
•Orientation-Muller et al. (1999)
-Dragoi et al. (2000)
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TestTest Adapt
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Pre
ferr
edF
lan
kN
ull
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Response=Rmaxcn/(cn+c50n)+base
TestAdaptTest
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Pro
po
rtio
n o
f C
ells
Ratio of Contrast Sensitivities
Different Patch Same Patch
0.5
0.25
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Ratio of Contrast Sensitivities
Pro
po
rtio
n o
f C
ells
0.5
0.25
Different Patch Same Patch
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Conclusions
Adaptation in MT
•causes a change in contrast gain
•transfers across directions within the tuning curve
•does not transfer across positions within the RF