TESTING MODELS OF SIGNAL INTEGRATION IN MT Valerio Mante, Najib Majaj, Matteo Carandini, J. Anthony Movshon ETH and University of Zurich Howard Hughes Medical Institute and New York University
Jan 20, 2016
TESTING MODELS OF SIGNAL INTEGRATION IN MT
Valerio Mante, Najib Majaj, Matteo Carandini, J. Anthony Movshon
ETH and University of ZurichHoward Hughes Medical Institute and New York University
Gratings and plaids
Models of MT direction selectivity
SH pattern model
(Simoncelli and Heeger 1998)
Component model
(Movshon et al. 1983)
Abstract Pattern model
(Movshon et al. 1983)
The stimuli and their velocities
Responses of three MT cells
Component model
Abstract pattern model
SH pattern model
SH pattern model cells sum the outputof the appropriate V1 cells
The direction tuning of SH pattern model cellsfor slow gratings is bimodal
Comparisonof the modelsfor the 3 cells
Comparisonof the modelsfor 39 cells
Conclusions
To fit our data, we extended the original abstract component and pattern models and simplified the SH pattern model.
Overall, the SH pattern model and the abstract pattern model performed equally well. But the SH model has fewer free parameters.
The SH pattern model predicts some properties that are not explained by the other two.