Horizontal connectivity in V1: Prediction of coherence in contour and motion integration
Fig 3
Spatio-temporal and axial selectivity of “Surround-Only” responses to centripetal AM flow.
(A) Single Cell example: Central inset cartoon: ON and OFF discharge fields, respectively in red and blue. White contour delineates the subthreshold receptive field (SRF). For comparison, respective positions of the Gabor inducer stimuli flashed in the surround are overlaid on the RF map. Two-stroke “Surround-Only” AM responses: comparison of “collinear” (red) and “parallel” (gold) responses evoked respectively along the orientation preference axis and across the width axis of the RF, with the Center-only response (black waveform). Bottom left corner, Vm subthreshold responses for sparse noise (ON (dark red) and OFF (dark blue) waveforms). (B) Dependency of Surround-Only responses on the orientation of the inducer: Right, top and bottom panels illustrate the Gabor inducer features and the color codes for the motion axis explored respectively in the ISO-and CROSS-configurations. The color code conventions are: ISO-RF: red for “collinear” along the orientation preference axis; gold for “parallel” across the RF width axis; CROSS-RF: cyan for “parallel” across the orientation preference axis; magenta for “collinear” along the RF width axis. See Text for details.