Benjamin Cowley
@benjocowley.bsky.social
Assistant Professor in computational neuroscience at Cold Spring Harbor Laboratory. Think cortically, act neuronally.
cowleygroup.cshl.edu
cowleygroup.cshl.edu
(btw, we have a dataset of V4 responses to sinusoidal gratings along with natural images if you need them!)
October 15, 2025 at 5:37 PM
(btw, we have a dataset of V4 responses to sinusoidal gratings along with natural images if you need them!)
I think a V1-bank of filters each tuned to a mixture of ori, freq, and a color should do a good job at predicting V4 responses to stimuli with those mixtures.
But a V1 bank is not predictive of V4 responses to natural images, suggesting 2nd order+ interactions a la simoncelli
But a V1 bank is not predictive of V4 responses to natural images, suggesting 2nd order+ interactions a la simoncelli
October 15, 2025 at 3:52 PM
I think a V1-bank of filters each tuned to a mixture of ori, freq, and a color should do a good job at predicting V4 responses to stimuli with those mixtures.
But a V1 bank is not predictive of V4 responses to natural images, suggesting 2nd order+ interactions a la simoncelli
But a V1 bank is not predictive of V4 responses to natural images, suggesting 2nd order+ interactions a la simoncelli
Still, that would be a fun model to use as a baseline!
October 15, 2025 at 2:44 PM
Still, that would be a fun model to use as a baseline!
Not sure ori/spatial freq/color is enough to characterize/describe the diversity of V4 tuning. E.g., the V4 neuron below is a nonlinear mix of the three. Predicting V4 responses to pure sinusoidal gratings feels a bit like trying to predict the weather really well in Iowa ignoring everywhere else.
October 15, 2025 at 2:44 PM
Not sure ori/spatial freq/color is enough to characterize/describe the diversity of V4 tuning. E.g., the V4 neuron below is a nonlinear mix of the three. Predicting V4 responses to pure sinusoidal gratings feels a bit like trying to predict the weather really well in Iowa ignoring everywhere else.