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Abstract:
Complex cells are selective for stimulus orientation and
spatial frequency (like simple cells) but not for spatial phase.
While complex cell responses to drifting gratings are relatively
unmodulated, the temporal frequency of complex cell responses to
counterphase gratings is twice that of the stimulus. We show that
complex cell responses can arise through recurrent interactions
within a network of cortical cells. With weak or absent recurrent
connections, the model cells in the network show responses similar
to simple cells. Strong recurrent connections result in complex
cell responses. Our results suggest that simple and complex cells
represent the weakly and strongly coupled regimes of the same basic
neural circuit.
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