Supporting Materials

The supporting materials provided with this paper include 6 movies that are referred to in the text plus visualizations of the spatial and temporal modes for all of the trials in the two preparations (Cor34: Left Cortex and Cor32: Right Cortex) that are used in this paper. The actual movies for this and othe data sets referenced in the paper can be found at http://vip.cs.utsa.edu/cortex/Papers/CorticalWaves. Alternatively these materials are available on CD-Rom and will be provided at no cost by the authors.

Movie #1: A side-by-side comparison of the original data with a data set reconstruction using only the three largest modes (M_1,1, M_1,2 and M_2,1 for this data set). Individual frames of this movie are displayed in the left two columns of Fig. 5. The reconstructed movie captures the prominent characteristics of the rostrocaudal and dorsomedial propagation--namely the constant velocity of the cortical wave during its propagation along the rostrocaudal axis and its pronounced slowing as it travels dorsomedially into DM. Trials cor3409 and cor3207 are displayed.

Movie #2: A movie reconstructed using only mode M_1,1, corresponding to the top row of Fig. 6Aa. The reconstructed data shows a lock-step rise and fall. Because of the pseudo-color scheme, the visual appearance is dominated by the location of the peak of M_1,1, making it appear so though there is a source located centrally in VC. Trials cor3409 and cor3207 are displayed.

Movie #3: A movie reconstructed using only modes M_1,1 and M_1,2, corresponding to Fig. 6Ab. The movie partially captures the rostrocaudal movement. Trials cor3409 and cor3207 are displayed.

Movie #4: A movie reconstructed using only modes M_1,1 and M_2,1 corresponding to Fig. 6Ac. The movie partially captures the movement into DM. Trials cor3409 and cor3207 are displayed.

Movie #5: A movie animating the schematic diagram of Fig. 6Bb showing how two standing waves can add to make a traveling wave.

Movie #6: A movie of trial cor3207 corresponding to Fig. 7Bb, a trial with a secondary rise, but and a reversal of sign of the projection of M_1,2. This trial has a wave reflection in the caudal pole. The color scheme used in this movie emphasizes the amplitude and latency of the wave front. Each pixel is displayed in neutral blue until its amplitude reaches half of its maximum height. At this time the color of the pixel is changed, using a rainbow color map that reflects latency. Dark red corresponds to lowest latency, while deep purple corresponds to longest latency. Each time the pixel falls below its half-height, its color is reset to neutral blue. This color scheme shows propagation more clearly than a straight amplitude scaling.

Additional Visualizations of Trials from the Preparations used in this Paper

Preparation Cor 34: The left cortex preparation used in Fig. 3, 4, 5, 8 and 9.

Preparation Cor 32: The right cortex preparation used in Fig. 3, 4, 5, 6, 7, 8 and 9.

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