Top frame is the "visual stimulation screen", i.e. the input to the model of the visual cortex.
Left bottom frame is the firing activity of pyramidal neurons in 2/3 layer of the visual cortex, i.e. the output of the model.
The rest frames are the firing activity of: pyramidal neurons in 4th cortical layer (left middle)
and interneurons in 4th (right middle) and 2/3 (right bottom) cortical layers.
We observe that pyramids in 2/3 layer are active in very local domains corresponding to the stimulus orientation inspite of weak selectivity of the pyramids in layer 4.